Articles | Volume 12, issue 22
https://doi.org/10.5194/bg-12-6529-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-12-6529-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
18 Nov 2015
Research article |
| 18 Nov 2015
Edaphic, structural and physiological contrasts across Amazon Basin forest–savanna ecotones suggest a role for potassium as a key modulator of tropical woody vegetation structure and function
Centre for Tropical Environment and Sustainability Sciences (TESS) and College of Marine and Environmental Sciences, James Cook University, Cairns, 4870, Qld, Australia
Department of Life Sciences, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, Berkshire SL5 7PY, UK
T. F. Domingues
Universidade de São Paulo, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Av Bandeirantes, 3900, CEP 14040-901, Bairro Monte Alegre, Ribeirão Preto, São Paulo, Brazil
F. Schrodt
iDiv, German Centre for Integrative Biodiversity Research, Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany
Max Planck Institute for Biogeochemistry, Postfach 10 0164, 07701 Jena, Germany
F. Y. Ishida
Centre for Tropical Environment and Sustainability Sciences (TESS) and College of Marine and Environmental Sciences, James Cook University, Cairns, 4870, Qld, Australia
T. R. Feldpausch
Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4RJ, UK
G. Saiz
Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, 82467, Garmisch-Partenkirchen, Germany
C. A. Quesada
Instituto Nacional de Pesquisas da Amazonia, Manaus, Cx Postal 2223 – CEP 69080-971, Brazil
M. Schwarz
Fieldwork Assistance, PSF 101022, 07710, Jena, Germany
M. Torello-Raventos
Centre for Tropical Environment and Sustainability Sciences (TESS) and College of Science Technology and Engineering, James Cook University, Cairns, Qld, Australia
M. Gilpin
School of Geography, University of Leeds, LS2 9JT, Leeds, UK
B. S. Marimon
Universidade do Estado de Mato Grosso, Br 158, Km 655, Antiga FAB, Nova Xavantina, MT. CEP 78690-00, Brazil
B. H. Marimon-Junior
Universidade do Estado de Mato Grosso, Br 158, Km 655, Antiga FAB, Nova Xavantina, MT. CEP 78690-00, Brazil
J. A. Ratter
Royal Botanic Garden, Edinburgh, EH3 5NZ, Scotland, UK
J. Grace
School of Geosciences, University of Edinburgh, EH8 9XP, Scotland, UK
G. B. Nardoto
Campus Darcy Ribeiro – Prédio da FACE Brasília, Distrito Federal, 70910-900, Brazil
E. Veenendaal
Centre for Ecosystem Studies, University of Wageningen, P.O. Box 47, 6700AA, Wageningen, the Netherlands
L. Arroyo
Universidad Autonoma Gabriel Rene Moreno, Avenidas Centenario, Venezuela y Av. 26 de Febrero 56 Santa Cruz de la Sierra, Bolivia
D. Villarroel
Museo Noel Kempff Mercado, Av. Irala no 565 – casilla 2489, Santa Cruz, Bolivia
T. J. Killeen
Agrotecnologica Amazonica, Santa Cruz, Bolivia
M. Steininger
formerly at: Conservation International, Washington D.C., USA
O. L. Phillips
School of Geography, University of Leeds, LS2 9JT, Leeds, UK
Related authors
Carlos Alberto Quesada, Claudia Paz, Erick Oblitas Mendoza, Oliver Lawrence Phillips, Gustavo Saiz, and Jon Lloyd
SOIL, 6, 53–88, https://doi.org/10.5194/soil-6-53-2020, https://doi.org/10.5194/soil-6-53-2020, 2020
Short summary
Short summary
Amazon soils hold as much carbon (C) as is contained in the vegetation. In this work we sampled soils across 8 different Amazonian countries to try to understand which soil properties control current Amazonian soil C concentrations. We confirm previous knowledge that highly developed soils hold C through clay content interactions but also show a previously unreported mechanism of soil C stabilization in the younger Amazonian soil types which hold C through aluminium organic matter interactions.
Amelie Baomalgré Bougma, Korodjouma Ouattara, Halidou Compaore, Hassan Bismarck Nacro, Caleb Melenya, Samuel Ayodele Mesele, Vincent Logah, Azeez Jamiu Oladipupo, Elmar Veenendaal, and Jonathan Lloyd
SOIL Discuss., https://doi.org/10.5194/soil-2019-87, https://doi.org/10.5194/soil-2019-87, 2020
Preprint withdrawn
Short summary
Short summary
To better understand the development of forest islands in west Africa, our study focused on soil aggregates stability of these patches across a precipitation transect. Soil samples were taken from 0 to 5 cm and 5 to 10 cm depths and aggregate fractions with diameters: > 500, 500–250 μm and 250–53 μm determined using the water sieving method. The results showed significant higher proportion of stable meso and macroaggregates in forest islands and natural savanna compared to agricultural soil.
J. Lloyd and E. M. Veenendaal
Biogeosciences Discuss., https://doi.org/10.5194/bg-2015-660, https://doi.org/10.5194/bg-2015-660, 2016
Revised manuscript not accepted
Short summary
Short summary
Fire has been proposed as the key driver of tropical forest and savanna biome distributions with many tropical ecologists believing that these biomes constitute alternate stable states (ASS). Contributing to an ongoing debate as evidence supporting the existence of ASS in the terrestrial tropics, we find all current arguments presented as supporting the existence of ASS to be flawed, with five specific fallacious argumentation types identified.
G. Saiz, M. Bird, C. Wurster, C. A. Quesada, P. Ascough, T. Domingues, F. Schrodt, M. Schwarz, T. R. Feldpausch, E. Veenendaal, G. Djagbletey, G. Jacobsen, F. Hien, H. Compaore, A. Diallo, and J. Lloyd
Biogeosciences, 12, 5041–5059, https://doi.org/10.5194/bg-12-5041-2015, https://doi.org/10.5194/bg-12-5041-2015, 2015
Short summary
Short summary
We demonstrate and explain differential patterns in SOM dynamics in C3/C4 mixed ecosystems at various spatial scales across contrasting climate and soils. This study shows that the interdependence between biotic and abiotic factors ultimately determines whether SOM dynamics of C3- and C4-derived vegetation are at variance in ecosystems where both vegetation types coexist. The results also highlight the far-reaching implications that vegetation thickening may have for the stability of deep SOM.
E. M. Veenendaal, M. Torello-Raventos, T. R. Feldpausch, T. F. Domingues, F. Gerard, F. Schrodt, G. Saiz, C. A. Quesada, G. Djagbletey, A. Ford, J. Kemp, B. S. Marimon, B. H. Marimon-Junior, E. Lenza, J. A. Ratter, L. Maracahipes, D. Sasaki, B. Sonké, L. Zapfack, D. Villarroel, M. Schwarz, F. Yoko Ishida, M. Gilpin, G. B. Nardoto, K. Affum-Baffoe, L. Arroyo, K. Bloomfield, G. Ceca, H. Compaore, K. Davies, A. Diallo, N. M. Fyllas, J. Gignoux, F. Hien, M. Johnson, E. Mougin, P. Hiernaux, T. Killeen, D. Metcalfe, H. S. Miranda, M. Steininger, K. Sykora, M. I. Bird, J. Grace, S. Lewis, O. L. Phillips, and J. Lloyd
Biogeosciences, 12, 2927–2951, https://doi.org/10.5194/bg-12-2927-2015, https://doi.org/10.5194/bg-12-2927-2015, 2015
Short summary
Short summary
When nearby forest and savanna stands are compared, they are not as structurally different as first seems. Moreover, savanna-forest transition zones typically occur at higher rainfall for South America than for Africa but with coexistence confined to a well-defined edaphic-climate envelope. With interacting soil cation-soil water storage–precipitations effects on canopy cover also observed we argue that both soils and climate influence the location of the two major tropical vegetation types.
K. J. Bloomfield, T. F. Domingues, G. Saiz, M. I. Bird, D. M. Crayn, A. Ford, D. J. Metcalfe, G. D. Farquhar, and J. Lloyd
Biogeosciences, 11, 7331–7347, https://doi.org/10.5194/bg-11-7331-2014, https://doi.org/10.5194/bg-11-7331-2014, 2014
M. O. Johnson, M. Gloor, M. J. Kirkby, and J. Lloyd
Biogeosciences, 11, 6873–6894, https://doi.org/10.5194/bg-11-6873-2014, https://doi.org/10.5194/bg-11-6873-2014, 2014
Short summary
Short summary
We present a soil evolution model which incorporates the major processes of pedogenesis: mineral weathering, leaching, erosion, bioturbation, nutrient cycling and organic carbon inputs. We compare the modelled soil properties with soil chronosequences from Hawaii and demonstrate that the model captures well the key components of soil development. The model also highlights the important role that vegetation plays in accelerating the weathering and the release of globally important nutrients.
N. M. Fyllas, E. Gloor, L. M. Mercado, S. Sitch, C. A. Quesada, T. F. Domingues, D. R. Galbraith, A. Torre-Lezama, E. Vilanova, H. Ramírez-Angulo, N. Higuchi, D. A. Neill, M. Silveira, L. Ferreira, G. A. Aymard C., Y. Malhi, O. L. Phillips, and J. Lloyd
Geosci. Model Dev., 7, 1251–1269, https://doi.org/10.5194/gmd-7-1251-2014, https://doi.org/10.5194/gmd-7-1251-2014, 2014
Ingrid Chanca, Ingeborg Levin, Susan Trumbore, Kita Macario, Jost Lavric, Carlos Alberto Quesada, Alessandro Carioca de Araújo, Cléo Quaresma Dias Júnior, Hella van Asperen, Samuel Hammer, and Carlos Sierra
EGUsphere, https://doi.org/10.5194/egusphere-2024-883, https://doi.org/10.5194/egusphere-2024-883, 2024
Short summary
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Assessing the net carbon (C) budget of the Amazon entails considering the magnitude and timing of C absorption and losses through respiration (transit time of C). Radiocarbon-based estimates of the transit time of C in the Amazon Tall Tower Observatory (ATTO) suggest a doubling of the transit time from 6 ± 2 years and 18 ± 5 years (October 2019 and December 2021, respectively). This variability indicates that only a fraction of newly fixed C can be stored for decades or longer.
João Paulo Darela-Filho, Anja Rammig, Katrin Fleischer, Tatiana Reichert, Laynara Figueiredo Lugli, Carlos Alberto Quesada, Luis Carlos Colocho Hurtarte, Mateus Dantas de Paula, and David M. Lapola
Earth Syst. Sci. Data, 16, 715–729, https://doi.org/10.5194/essd-16-715-2024, https://doi.org/10.5194/essd-16-715-2024, 2024
Short summary
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Phosphorus (P) is crucial for plant growth, and scientists have created models to study how it interacts with carbon cycle in ecosystems. To apply these models, it is important to know the distribution of phosphorus in soil. In this study we estimated the distribution of phosphorus in the Amazon region. The results showed a clear gradient of soil development and P content. These maps can help improve ecosystem models and generate new hypotheses about phosphorus availability in the Amazon.
Luiz A. T. Machado, Jürgen Kesselmeier, Santiago Botia, Hella Van Asperen, Alessandro C. de Araújo, Paulo Artaxo, Achim Edtbauer, Rosa Ferreira, Hartwig Harder, Sam Jones, Cléo Q. Dias-Júnior, Guido G. Haytzmann, Carlos A. Quesada, Shujiro Komiya, Jost Lavric, Jos Lelieveld, Ingeborg Levin, Anke Nölscher, Eva Pfannerstill, Mira Pöhlker, Ulrich Pöschl, Akima Ringsdorf, Luciana Rizzo, Ana M. Yáñez-Serrano, Susan Trumbore, Wanda I. D. Valenti, Jordi Vila-Guerau de Arellano, David Walter, Jonathan Williams, Stefan Wolff, and Christopher Pöhlker
EGUsphere, https://doi.org/10.5194/egusphere-2023-2901, https://doi.org/10.5194/egusphere-2023-2901, 2024
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Composite analysis of the gas concentration before and after rainfall, during the day and night, gives insight into the complex relationship between trace gas variability and precipitation. This analysis helps to understand the sources and sinks of trace gases within a forest ecosystem. It elucidates processes that are not discernible under undisturbed conditions and contributes to a deeper understanding of the trace gas life cycle and its intricate interactions with cloud dynamics in the Amazon
Mahdi André Nakhavali, Lina M. Mercado, Iain P. Hartley, Stephen Sitch, Fernanda V. Cunha, Raffaello di Ponzio, Laynara F. Lugli, Carlos A. Quesada, Kelly M. Andersen, Sarah E. Chadburn, Andy J. Wiltshire, Douglas B. Clark, Gyovanni Ribeiro, Lara Siebert, Anna C. M. Moraes, Jéssica Schmeisk Rosa, Rafael Assis, and José L. Camargo
Geosci. Model Dev., 15, 5241–5269, https://doi.org/10.5194/gmd-15-5241-2022, https://doi.org/10.5194/gmd-15-5241-2022, 2022
Short summary
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In tropical ecosystems, the availability of rock-derived elements such as P can be very low. Thus, without a representation of P cycling, tropical forest responses to rising atmospheric CO2 conditions in areas such as Amazonia remain highly uncertain. We introduced P dynamics and its interactions with the N and P cycles into the JULES model. Our results highlight the potential for high P limitation and therefore lower CO2 fertilization capacity in the Amazon forest with low-fertility soils.
Rahayu Adzhar, Douglas I. Kelley, Ning Dong, Charles George, Mireia Torello Raventos, Elmar Veenendaal, Ted R. Feldpausch, Oliver L. Phillips, Simon L. Lewis, Bonaventure Sonké, Herman Taedoumg, Beatriz Schwantes Marimon, Tomas Domingues, Luzmila Arroyo, Gloria Djagbletey, Gustavo Saiz, and France Gerard
Biogeosciences, 19, 1377–1394, https://doi.org/10.5194/bg-19-1377-2022, https://doi.org/10.5194/bg-19-1377-2022, 2022
Short summary
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The MODIS Vegetation Continuous Fields (VCF) product underestimates tree cover compared to field data and could be underestimating tree cover significantly across the tropics. VCF is used to represent land cover or validate model performance in many land surface and global vegetation models and to train finer-scaled Earth observation products. Because underestimation in VCF may render it unsuitable for training data and bias model predictions, it should be calibrated before use in the tropics.
Gilvan Sampaio, Marília H. Shimizu, Carlos A. Guimarães-Júnior, Felipe Alexandre, Marcelo Guatura, Manoel Cardoso, Tomas F. Domingues, Anja Rammig, Celso von Randow, Luiz F. C. Rezende, and David M. Lapola
Biogeosciences, 18, 2511–2525, https://doi.org/10.5194/bg-18-2511-2021, https://doi.org/10.5194/bg-18-2511-2021, 2021
Short summary
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The impact of large-scale deforestation and the physiological effects of elevated atmospheric CO2 on Amazon rainfall are systematically compared in this study. Our results are remarkable in showing that the two disturbances cause equivalent rainfall decrease, though through different causal mechanisms. These results highlight the importance of not only curbing regional deforestation but also reducing global CO2 emissions to avoid climatic changes in the Amazon.
Carlos Alberto Quesada, Claudia Paz, Erick Oblitas Mendoza, Oliver Lawrence Phillips, Gustavo Saiz, and Jon Lloyd
SOIL, 6, 53–88, https://doi.org/10.5194/soil-6-53-2020, https://doi.org/10.5194/soil-6-53-2020, 2020
Short summary
Short summary
Amazon soils hold as much carbon (C) as is contained in the vegetation. In this work we sampled soils across 8 different Amazonian countries to try to understand which soil properties control current Amazonian soil C concentrations. We confirm previous knowledge that highly developed soils hold C through clay content interactions but also show a previously unreported mechanism of soil C stabilization in the younger Amazonian soil types which hold C through aluminium organic matter interactions.
Amelie Baomalgré Bougma, Korodjouma Ouattara, Halidou Compaore, Hassan Bismarck Nacro, Caleb Melenya, Samuel Ayodele Mesele, Vincent Logah, Azeez Jamiu Oladipupo, Elmar Veenendaal, and Jonathan Lloyd
SOIL Discuss., https://doi.org/10.5194/soil-2019-87, https://doi.org/10.5194/soil-2019-87, 2020
Preprint withdrawn
Short summary
Short summary
To better understand the development of forest islands in west Africa, our study focused on soil aggregates stability of these patches across a precipitation transect. Soil samples were taken from 0 to 5 cm and 5 to 10 cm depths and aggregate fractions with diameters: > 500, 500–250 μm and 250–53 μm determined using the water sieving method. The results showed significant higher proportion of stable meso and macroaggregates in forest islands and natural savanna compared to agricultural soil.
Chantelle Burton, Richard Betts, Manoel Cardoso, Ted R. Feldpausch, Anna Harper, Chris D. Jones, Douglas I. Kelley, Eddy Robertson, and Andy Wiltshire
Geosci. Model Dev., 12, 179–193, https://doi.org/10.5194/gmd-12-179-2019, https://doi.org/10.5194/gmd-12-179-2019, 2019
Short summary
Short summary
Fire and land-use change are important disturbances within the Earth system, and their inclusion in models is critical to enable the correct simulation of vegetation cover. Here we describe developments to the land surface model JULES to represent explicit land-use change and fire and to assess the effects of each process on present day vegetation compared to observations. Using historical land-use data and the fire model INFERNO, overall model results are improved by the developments.
Kaniska Mallick, Ivonne Trebs, Eva Boegh, Laura Giustarini, Martin Schlerf, Darren T. Drewry, Lucien Hoffmann, Celso von Randow, Bart Kruijt, Alessandro Araùjo, Scott Saleska, James R. Ehleringer, Tomas F. Domingues, Jean Pierre H. B. Ometto, Antonio D. Nobre, Osvaldo Luiz Leal de Moraes, Matthew Hayek, J. William Munger, and Steven C. Wofsy
Hydrol. Earth Syst. Sci., 20, 4237–4264, https://doi.org/10.5194/hess-20-4237-2016, https://doi.org/10.5194/hess-20-4237-2016, 2016
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While quantifying vegetation water use over multiple plant function types in the Amazon Basin, we found substantial biophysical control during drought as well as a water-stress period and dominant climatic control during a water surplus period. This work has direct implication in understanding the resilience of the Amazon forest in the spectre of frequent drought menace as well as the role of drought-induced plant biophysical functioning in modulating the water-carbon coupling in this ecosystem.
J. Lloyd and E. M. Veenendaal
Biogeosciences Discuss., https://doi.org/10.5194/bg-2015-660, https://doi.org/10.5194/bg-2015-660, 2016
Revised manuscript not accepted
Short summary
Short summary
Fire has been proposed as the key driver of tropical forest and savanna biome distributions with many tropical ecologists believing that these biomes constitute alternate stable states (ASS). Contributing to an ongoing debate as evidence supporting the existence of ASS in the terrestrial tropics, we find all current arguments presented as supporting the existence of ASS to be flawed, with five specific fallacious argumentation types identified.
K. E. Clark, A. J. West, R. G. Hilton, G. P. Asner, C. A. Quesada, M. R. Silman, S. S. Saatchi, W. Farfan-Rios, R. E. Martin, A. B. Horwath, K. Halladay, M. New, and Y. Malhi
Earth Surf. Dynam., 4, 47–70, https://doi.org/10.5194/esurf-4-47-2016, https://doi.org/10.5194/esurf-4-47-2016, 2016
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The key findings of this paper are that landslides in the eastern Andes of Peru in the Kosñipata Valley rapidly turn over the landscape in ~1320 years, with a rate of 0.076% yr-1. Additionally, landslides were concentrated at lower elevations, due to an intense storm in 2010 accounting for ~1/4 of the total landslide area over the 25-year remote sensing study. Valley-wide carbon stocks were determined, and we estimate that 26 tC km-2 yr-1 of soil and biomass are stripped by landslides.
M. O. Andreae, O. C. Acevedo, A. Araùjo, P. Artaxo, C. G. G. Barbosa, H. M. J. Barbosa, J. Brito, S. Carbone, X. Chi, B. B. L. Cintra, N. F. da Silva, N. L. Dias, C. Q. Dias-Júnior, F. Ditas, R. Ditz, A. F. L. Godoi, R. H. M. Godoi, M. Heimann, T. Hoffmann, J. Kesselmeier, T. Könemann, M. L. Krüger, J. V. Lavric, A. O. Manzi, A. P. Lopes, D. L. Martins, E. F. Mikhailov, D. Moran-Zuloaga, B. W. Nelson, A. C. Nölscher, D. Santos Nogueira, M. T. F. Piedade, C. Pöhlker, U. Pöschl, C. A. Quesada, L. V. Rizzo, C.-U. Ro, N. Ruckteschler, L. D. A. Sá, M. de Oliveira Sá, C. B. Sales, R. M. N. dos Santos, J. Saturno, J. Schöngart, M. Sörgel, C. M. de Souza, R. A. F. de Souza, H. Su, N. Targhetta, J. Tóta, I. Trebs, S. Trumbore, A. van Eijck, D. Walter, Z. Wang, B. Weber, J. Williams, J. Winderlich, F. Wittmann, S. Wolff, and A. M. Yáñez-Serrano
Atmos. Chem. Phys., 15, 10723–10776, https://doi.org/10.5194/acp-15-10723-2015, https://doi.org/10.5194/acp-15-10723-2015, 2015
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This paper describes the Amazon Tall Tower Observatory (ATTO), a new atmosphere-biosphere observatory located in the remote Amazon Basin. It presents results from ecosystem ecology, meteorology, trace gas, and aerosol measurements collected at the ATTO site during the first 3 years of operation.
G. Saiz, M. Bird, C. Wurster, C. A. Quesada, P. Ascough, T. Domingues, F. Schrodt, M. Schwarz, T. R. Feldpausch, E. Veenendaal, G. Djagbletey, G. Jacobsen, F. Hien, H. Compaore, A. Diallo, and J. Lloyd
Biogeosciences, 12, 5041–5059, https://doi.org/10.5194/bg-12-5041-2015, https://doi.org/10.5194/bg-12-5041-2015, 2015
Short summary
Short summary
We demonstrate and explain differential patterns in SOM dynamics in C3/C4 mixed ecosystems at various spatial scales across contrasting climate and soils. This study shows that the interdependence between biotic and abiotic factors ultimately determines whether SOM dynamics of C3- and C4-derived vegetation are at variance in ecosystems where both vegetation types coexist. The results also highlight the far-reaching implications that vegetation thickening may have for the stability of deep SOM.
E. M. Veenendaal, M. Torello-Raventos, T. R. Feldpausch, T. F. Domingues, F. Gerard, F. Schrodt, G. Saiz, C. A. Quesada, G. Djagbletey, A. Ford, J. Kemp, B. S. Marimon, B. H. Marimon-Junior, E. Lenza, J. A. Ratter, L. Maracahipes, D. Sasaki, B. Sonké, L. Zapfack, D. Villarroel, M. Schwarz, F. Yoko Ishida, M. Gilpin, G. B. Nardoto, K. Affum-Baffoe, L. Arroyo, K. Bloomfield, G. Ceca, H. Compaore, K. Davies, A. Diallo, N. M. Fyllas, J. Gignoux, F. Hien, M. Johnson, E. Mougin, P. Hiernaux, T. Killeen, D. Metcalfe, H. S. Miranda, M. Steininger, K. Sykora, M. I. Bird, J. Grace, S. Lewis, O. L. Phillips, and J. Lloyd
Biogeosciences, 12, 2927–2951, https://doi.org/10.5194/bg-12-2927-2015, https://doi.org/10.5194/bg-12-2927-2015, 2015
Short summary
Short summary
When nearby forest and savanna stands are compared, they are not as structurally different as first seems. Moreover, savanna-forest transition zones typically occur at higher rainfall for South America than for Africa but with coexistence confined to a well-defined edaphic-climate envelope. With interacting soil cation-soil water storage–precipitations effects on canopy cover also observed we argue that both soils and climate influence the location of the two major tropical vegetation types.
K. J. Bloomfield, T. F. Domingues, G. Saiz, M. I. Bird, D. M. Crayn, A. Ford, D. J. Metcalfe, G. D. Farquhar, and J. Lloyd
Biogeosciences, 11, 7331–7347, https://doi.org/10.5194/bg-11-7331-2014, https://doi.org/10.5194/bg-11-7331-2014, 2014
M. O. Johnson, M. Gloor, M. J. Kirkby, and J. Lloyd
Biogeosciences, 11, 6873–6894, https://doi.org/10.5194/bg-11-6873-2014, https://doi.org/10.5194/bg-11-6873-2014, 2014
Short summary
Short summary
We present a soil evolution model which incorporates the major processes of pedogenesis: mineral weathering, leaching, erosion, bioturbation, nutrient cycling and organic carbon inputs. We compare the modelled soil properties with soil chronosequences from Hawaii and demonstrate that the model captures well the key components of soil development. The model also highlights the important role that vegetation plays in accelerating the weathering and the release of globally important nutrients.
A. P. Schrier-Uijl, P. S. Kroon, D. M. D. Hendriks, A. Hensen, J. Van Huissteden, F. Berendse, and E. M. Veenendaal
Biogeosciences, 11, 4559–4576, https://doi.org/10.5194/bg-11-4559-2014, https://doi.org/10.5194/bg-11-4559-2014, 2014
N. M. Fyllas, E. Gloor, L. M. Mercado, S. Sitch, C. A. Quesada, T. F. Domingues, D. R. Galbraith, A. Torre-Lezama, E. Vilanova, H. Ramírez-Angulo, N. Higuchi, D. A. Neill, M. Silveira, L. Ferreira, G. A. Aymard C., Y. Malhi, O. L. Phillips, and J. Lloyd
Geosci. Model Dev., 7, 1251–1269, https://doi.org/10.5194/gmd-7-1251-2014, https://doi.org/10.5194/gmd-7-1251-2014, 2014
B. B. L. Cintra, J. Schietti, T. Emillio, D. Martins, G. Moulatlet, P. Souza, C. Levis, C. A. Quesada, and J. Schöngart
Biogeosciences, 10, 7759–7774, https://doi.org/10.5194/bg-10-7759-2013, https://doi.org/10.5194/bg-10-7759-2013, 2013
A. D. A. Castanho, M. T. Coe, M. H. Costa, Y. Malhi, D. Galbraith, and C. A. Quesada
Biogeosciences, 10, 2255–2272, https://doi.org/10.5194/bg-10-2255-2013, https://doi.org/10.5194/bg-10-2255-2013, 2013
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Upscaling dryland carbon and water fluxes with artificial neural networks of optical, thermal, and microwave satellite remote sensing
Sun-induced fluorescence as a proxy for primary productivity across vegetation types and climates
Technical note: A view from space on global flux towers by MODIS and Landsat: the FluxnetEO data set
Changing sub-Arctic tundra vegetation upon permafrost degradation: impact on foliar mineral element cycling
Land Management Contributes significantly to observed Vegetation Browning in Syria during 2001–2018
MODIS Vegetation Continuous Fields tree cover needs calibrating in tropical savannas
Assessing the representation of the Australian carbon cycle in global vegetation models
Assessing the response of soil carbon in Australia to changing inputs and climate using a consistent modelling framework
Reviews and syntheses: Ongoing and emerging opportunities to improve environmental science using observations from the Advanced Baseline Imager on the Geostationary Operational Environmental Satellites
First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region
The impact of wildfire on biogeochemical fluxes and water quality in boreal catchments
Examining the sensitivity of the terrestrial carbon cycle to the expression of El Niño
Subalpine grassland productivity increased with warmer and drier conditions, but not with higher N deposition, in an altitudinal transplantation experiment
Reviews and syntheses: Impacts of plant-silica–herbivore interactions on terrestrial biogeochemical cycling
Implementation of nitrogen cycle in the CLASSIC land model
Combined effects of ozone and drought stress on the emission of biogenic volatile organic compounds from Quercus robur L.
A bottom-up quantification of foliar mercury uptake fluxes across Europe
Lagged effects regulate the inter-annual variability of the tropical carbon balance
Spatial variations in terrestrial net ecosystem productivity and its local indicators
Nitrogen cycling in CMIP6 land surface models: progress and limitations
Decomposing reflectance spectra to track gross primary production in a subalpine evergreen forest
Sensitivity of 21st century simulated ecosystem indicators to model parameters, prescribed climate drivers, RCP scenarios and forest management actions for two Finnish boreal forest sites
Summarizing the state of the terrestrial biosphere in few dimensions
Patterns and trends of the dominant environmental controls of net biome productivity
Localized basal area affects soil respiration temperature sensitivity in a coastal deciduous forest
Dissolved organic carbon mobilized from organic horizons of mature and harvested black spruce plots in a mesic boreal region
Ideas and perspectives: Proposed best practices for collaboration at cross-disciplinary observatories
Effects of leaf length and development stage on the triple oxygen isotope signature of grass leaf water and phytoliths: insights for a proxy of continental atmospheric humidity
Response of simulated burned area to historical changes in environmental and anthropogenic factors: a comparison of seven fire models
Estimation of coarse dead wood stocks in intact and degraded forests in the Brazilian Amazon using airborne lidar
Theoretical uncertainties for global satellite-derived burned area estimates
Estimating global gross primary productivity using chlorophyll fluorescence and a data assimilation system with the BETHY-SCOPE model
How representative are FLUXNET measurements of surface fluxes during temperature extremes?
Stable carbon and nitrogen isotopic composition of leaves, litter, and soils of various ecosystems along an elevational and land-use gradient at Mount Kilimanjaro, Tanzania
Comparison of CO2 and O2 fluxes demonstrate retention of respired CO2 in tree stems from a range of tree species
Tropical climate–vegetation–fire relationships: multivariate evaluation of the land surface model JSBACH
Martin Jung, Jacob Nelson, Mirco Migliavacca, Tarek El-Madany, Dario Papale, Markus Reichstein, Sophia Walther, and Thomas Wutzler
Biogeosciences, 21, 1827–1846, https://doi.org/10.5194/bg-21-1827-2024, https://doi.org/10.5194/bg-21-1827-2024, 2024
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We present a methodology to detect inconsistencies in perhaps the most important data source for measurements of ecosystem–atmosphere carbon, water, and energy fluxes. We expect that the derived consistency flags will be relevant for data users and will help in improving our understanding of and our ability to model ecosystem–climate interactions.
Prajwal Khanal, Anne J. Hoek Van Dijke, Timo Schaffhauser, Wantong Li, Sinikka J. Paulus, Chunhui Zhan, and René Orth
Biogeosciences, 21, 1533–1547, https://doi.org/10.5194/bg-21-1533-2024, https://doi.org/10.5194/bg-21-1533-2024, 2024
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Water availability is essential for vegetation functioning, but the depth of vegetation water uptake is largely unknown due to sparse ground measurements. This study correlates vegetation growth with soil moisture availability globally to infer vegetation water uptake depth using only satellite-based data. We find that the vegetation water uptake depth varies across climate regimes and vegetation types and also changes during dry months at a global scale.
Anna-Maria Virkkala, Pekka Niittynen, Julia Kemppinen, Maija E. Marushchak, Carolina Voigt, Geert Hensgens, Johanna Kerttula, Konsta Happonen, Vilna Tyystjärvi, Christina Biasi, Jenni Hultman, Janne Rinne, and Miska Luoto
Biogeosciences, 21, 335–355, https://doi.org/10.5194/bg-21-335-2024, https://doi.org/10.5194/bg-21-335-2024, 2024
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Arctic greenhouse gas (GHG) fluxes of CO2, CH4, and N2O are important for climate feedbacks. We combined extensive in situ measurements and remote sensing data to develop machine-learning models to predict GHG fluxes at a 2 m resolution across a tundra landscape. The analysis revealed that the system was a net GHG sink and showed widespread CH4 uptake in upland vegetation types, almost surpassing the high wetland CH4 emissions at the landscape scale.
Thomas Baer, Gerhard Furrer, Stephan Zimmermann, and Patrick Schleppi
Biogeosciences, 20, 4577–4589, https://doi.org/10.5194/bg-20-4577-2023, https://doi.org/10.5194/bg-20-4577-2023, 2023
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Nitrogen (N) deposition to forest ecosystems is a matter of concern because it affects their nutrient status and makes their soil acidic. We observed an ongoing acidification in a montane forest in central Switzerland even if the subsoil of this site contains carbonates and is thus well buffered. We experimentally added N to simulate a higher pollution, and this increased the acidification. After 25 years of study, however, we can see the first signs of recovery, also under higher N deposition.
Huiying Xu, Han Wang, Iain Colin Prentice, and Sandy P. Harrison
Biogeosciences, 20, 4511–4525, https://doi.org/10.5194/bg-20-4511-2023, https://doi.org/10.5194/bg-20-4511-2023, 2023
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Leaf carbon (C) and nitrogen (N) are crucial elements in leaf construction and physiological processes. This study reconciled the roles of phylogeny, species identity, and climate in stoichiometric traits at individual and community levels. The variations in community-level leaf N and C : N ratio were captured by optimality-based models using climate data. Our results provide an approach to improve the representation of leaf stoichiometry in vegetation models to better couple N with C cycling.
Juliëtte C. S. Anema, Klaas Folkert Boersma, Piet Stammes, Gerbrand Koren, William Woodgate, Philipp Köhler, Christian Frankenberg, and Jacqui Stol
EGUsphere, https://doi.org/10.5194/egusphere-2023-1930, https://doi.org/10.5194/egusphere-2023-1930, 2023
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To keep the Paris agreement goals within reach, negative emissions will be necessary. They can be achieved with mitigation techniques such as reforestation that remove CO2 from the atmosphere. While governments have pinned their hopes on them, there is not yet a good set of tools to objectively determine whether negative emissions do what they promise. Here we show how satellite measurements of plant fluorescence are useful in detecting carbon uptake by reforestation and vegetation regrowth.
István Dunkl, Nicole Lovenduski, Alessio Collalti, Vivek K. Arora, Tatiana Ilyina, and Victor Brovkin
Biogeosciences, 20, 3523–3538, https://doi.org/10.5194/bg-20-3523-2023, https://doi.org/10.5194/bg-20-3523-2023, 2023
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Despite differences in the reproduction of gross primary productivity (GPP) by Earth system models (ESMs), ESMs have similar predictability of the global carbon cycle. We found that, although GPP variability originates from different regions and is driven by different climatic variables across the ESMs, the ESMs rely on the same mechanisms to predict their own GPP. This shows that the predictability of the carbon cycle is limited by our understanding of variability rather than predictability.
David T. Milodowski, T. Luke Smallman, and Mathew Williams
Biogeosciences, 20, 3301–3327, https://doi.org/10.5194/bg-20-3301-2023, https://doi.org/10.5194/bg-20-3301-2023, 2023
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Model–data fusion (MDF) allows us to combine ecosystem models with Earth observation data. Fragmented landscapes, with a mosaic of contrasting ecosystems, pose a challenge for MDF. We develop a novel MDF framework to estimate the carbon balance of fragmented landscapes and show the importance of accounting for ecosystem heterogeneity to prevent scale-dependent bias in estimated carbon fluxes, disturbance fluxes in particular, and to improve ecological fidelity of the calibrated models.
Keri L. Bowering, Kate A. Edwards, and Susan E. Ziegler
Biogeosciences, 20, 2189–2206, https://doi.org/10.5194/bg-20-2189-2023, https://doi.org/10.5194/bg-20-2189-2023, 2023
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Dissolved organic matter (DOM) mobilized from surface soils is a source of carbon (C) for deeper mineral horizons but also a mechanism of C loss. Composition of DOM mobilized in boreal forests varied more by season than as a result of forest harvesting. Results suggest reduced snowmelt and increased fall precipitation enhance DOM properties promoting mineral soil C stores. These findings, coupled with hydrology, can inform on soil C fate and boreal forest C balance in response to climate change.
Bharat Sharma, Jitendra Kumar, Auroop R. Ganguly, and Forrest M. Hoffman
Biogeosciences, 20, 1829–1841, https://doi.org/10.5194/bg-20-1829-2023, https://doi.org/10.5194/bg-20-1829-2023, 2023
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Rising atmospheric carbon dioxide increases vegetation growth and causes more heatwaves and droughts. The impact of such climate extremes is detrimental to terrestrial carbon uptake capacity. We found that due to overall climate warming, about 88 % of the world's regions towards the end of 2100 will show anomalous losses in net biospheric productivity (NBP) rather than gains. More than 50 % of all negative NBP extremes were driven by the compound effect of dry, hot, and fire conditions.
Britta Greenshields, Barbara von der Lühe, Felix Schwarz, Harold J. Hughes, Aiyen Tjoa, Martyna Kotowska, Fabian Brambach, and Daniela Sauer
Biogeosciences, 20, 1259–1276, https://doi.org/10.5194/bg-20-1259-2023, https://doi.org/10.5194/bg-20-1259-2023, 2023
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Silicon (Si) can have multiple beneficial effects on crops such as oil palms. In this study, we quantified Si concentrations in various parts of an oil palm (leaflets, rachises, fruit-bunch parts) to derive Si storage estimates for the total above-ground biomass of an oil palm and 1 ha of an oil-palm plantation. We proposed a Si balance by identifying Si return (via palm fronds) and losses (via harvest) in the system and recommend management measures that enhance Si cycling.
Luisa Schmidt, Matthias Forkel, Ruxandra-Maria Zotta, Samuel Scherrer, Wouter A. Dorigo, Alexander Kuhn-Régnier, Robin van der Schalie, and Marta Yebra
Biogeosciences, 20, 1027–1046, https://doi.org/10.5194/bg-20-1027-2023, https://doi.org/10.5194/bg-20-1027-2023, 2023
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Vegetation attenuates natural microwave emissions from the land surface. The strength of this attenuation is quantified as the vegetation optical depth (VOD) parameter and is influenced by the vegetation mass, structure, water content, and observation wavelength. Here we model the VOD signal as a multi-variate function of several descriptive vegetation variables. The results help in understanding the effects of ecosystem properties on VOD.
Nagham Tabaja, David Amouroux, Lamis Chalak, François Fourel, Emmanuel Tessier, Ihab Jomaa, Milad El Riachy, and Ilham Bentaleb
Biogeosciences, 20, 619–633, https://doi.org/10.5194/bg-20-619-2023, https://doi.org/10.5194/bg-20-619-2023, 2023
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This study investigates the seasonality of the mercury (Hg) concentration of olive trees. Hg concentrations of foliage, stems, soil surface, and litter were analyzed on a monthly basis in ancient olive trees growing in two groves in Lebanon. Our study draws an adequate baseline for the eastern Mediterranean and for the region with similar climatic inventories on Hg vegetation uptake in addition to being a baseline for new studies on olive trees in the Mediterranean.
Allison N. Myers-Pigg, Karl Kaiser, Ronald Benner, and Susan E. Ziegler
Biogeosciences, 20, 489–503, https://doi.org/10.5194/bg-20-489-2023, https://doi.org/10.5194/bg-20-489-2023, 2023
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Boreal forests, historically a global sink for atmospheric CO2, store carbon in vast soil reservoirs. To predict how such stores will respond to climate warming we need to understand climate–ecosystem feedbacks. We find boreal forest soil carbon stores are maintained through enhanced nitrogen cycling with climate warming, providing direct evidence for a key feedback. Further application of the approach demonstrated here will improve our understanding of the limits of climate–ecosystem feedbacks.
Matthew P. Dannenberg, Mallory L. Barnes, William K. Smith, Miriam R. Johnston, Susan K. Meerdink, Xian Wang, Russell L. Scott, and Joel A. Biederman
Biogeosciences, 20, 383–404, https://doi.org/10.5194/bg-20-383-2023, https://doi.org/10.5194/bg-20-383-2023, 2023
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Earth's drylands provide ecosystem services to many people and will likely be strongly affected by climate change, but it is quite challenging to monitor the productivity and water use of dryland plants with satellites. We developed and tested an approach for estimating dryland vegetation activity using machine learning to combine information from multiple satellite sensors. Our approach excelled at estimating photosynthesis and water use largely due to the inclusion of satellite soil moisture.
Mark Pickering, Alessandro Cescatti, and Gregory Duveiller
Biogeosciences, 19, 4833–4864, https://doi.org/10.5194/bg-19-4833-2022, https://doi.org/10.5194/bg-19-4833-2022, 2022
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This study explores two of the most recent products in carbon productivity estimation, FLUXCOM gross primary productivity (GPP), calculated by upscaling local measurements of CO2 exchange, and remotely sensed sun-induced chlorophyll a fluorescence (SIF). High-resolution SIF data are valuable in demonstrating similarity in the SIF–GPP relationship between vegetation covers, provide an independent probe of the FLUXCOM GPP model and demonstrate the response of SIF to meteorological fluctuations.
Sophia Walther, Simon Besnard, Jacob Allen Nelson, Tarek Sebastian El-Madany, Mirco Migliavacca, Ulrich Weber, Nuno Carvalhais, Sofia Lorena Ermida, Christian Brümmer, Frederik Schrader, Anatoly Stanislavovich Prokushkin, Alexey Vasilevich Panov, and Martin Jung
Biogeosciences, 19, 2805–2840, https://doi.org/10.5194/bg-19-2805-2022, https://doi.org/10.5194/bg-19-2805-2022, 2022
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Satellite observations help interpret station measurements of local carbon, water, and energy exchange between the land surface and the atmosphere and are indispensable for simulations of the same in land surface models and their evaluation. We propose generalisable and efficient approaches to systematically ensure high quality and to estimate values in data gaps. We apply them to satellite data of surface reflectance and temperature with different resolutions at the stations.
Elisabeth Mauclet, Yannick Agnan, Catherine Hirst, Arthur Monhonval, Benoît Pereira, Aubry Vandeuren, Maëlle Villani, Justin Ledman, Meghan Taylor, Briana L. Jasinski, Edward A. G. Schuur, and Sophie Opfergelt
Biogeosciences, 19, 2333–2351, https://doi.org/10.5194/bg-19-2333-2022, https://doi.org/10.5194/bg-19-2333-2022, 2022
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Arctic warming and permafrost degradation largely affect tundra vegetation. Wetter lowlands show an increase in sedges, whereas drier uplands favor shrub expansion. Here, we demonstrate that the difference in the foliar elemental composition of typical tundra vegetation species controls the change in local foliar elemental stock and potential mineral element cycling through litter production upon a shift in tundra vegetation.
Tiexi Chen, Renjie Guo, Qingyun Yan, Xin Chen, Shengjie Zhou, Chuanzhuang Liang, Xueqiong Wei, and Han Dolman
Biogeosciences, 19, 1515–1525, https://doi.org/10.5194/bg-19-1515-2022, https://doi.org/10.5194/bg-19-1515-2022, 2022
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Currently people are very concerned about vegetation changes and their driving factors, including natural and anthropogenic drivers. In this study, a general browning trend is found in Syria during 2001–2018, indicated by the vegetation index. We found that land management caused by social unrest is the main cause of this browning phenomenon. The mechanism initially reported here highlights the importance of land management impacts at the regional scale.
Rahayu Adzhar, Douglas I. Kelley, Ning Dong, Charles George, Mireia Torello Raventos, Elmar Veenendaal, Ted R. Feldpausch, Oliver L. Phillips, Simon L. Lewis, Bonaventure Sonké, Herman Taedoumg, Beatriz Schwantes Marimon, Tomas Domingues, Luzmila Arroyo, Gloria Djagbletey, Gustavo Saiz, and France Gerard
Biogeosciences, 19, 1377–1394, https://doi.org/10.5194/bg-19-1377-2022, https://doi.org/10.5194/bg-19-1377-2022, 2022
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The MODIS Vegetation Continuous Fields (VCF) product underestimates tree cover compared to field data and could be underestimating tree cover significantly across the tropics. VCF is used to represent land cover or validate model performance in many land surface and global vegetation models and to train finer-scaled Earth observation products. Because underestimation in VCF may render it unsuitable for training data and bias model predictions, it should be calibrated before use in the tropics.
Lina Teckentrup, Martin G. De Kauwe, Andrew J. Pitman, Daniel S. Goll, Vanessa Haverd, Atul K. Jain, Emilie Joetzjer, Etsushi Kato, Sebastian Lienert, Danica Lombardozzi, Patrick C. McGuire, Joe R. Melton, Julia E. M. S. Nabel, Julia Pongratz, Stephen Sitch, Anthony P. Walker, and Sönke Zaehle
Biogeosciences, 18, 5639–5668, https://doi.org/10.5194/bg-18-5639-2021, https://doi.org/10.5194/bg-18-5639-2021, 2021
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The Australian continent is included in global assessments of the carbon cycle such as the global carbon budget, yet the performance of dynamic global vegetation models (DGVMs) over Australia has rarely been evaluated. We assessed simulations by an ensemble of dynamic global vegetation models over Australia and highlighted a number of key areas that lead to model divergence on both short (inter-annual) and long (decadal) timescales.
Juhwan Lee, Raphael A. Viscarra Rossel, Mingxi Zhang, Zhongkui Luo, and Ying-Ping Wang
Biogeosciences, 18, 5185–5202, https://doi.org/10.5194/bg-18-5185-2021, https://doi.org/10.5194/bg-18-5185-2021, 2021
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We performed Roth C simulations across Australia and assessed the response of soil carbon to changing inputs and future climate change using a consistent modelling framework. Site-specific initialisation of the C pools with measurements of the C fractions is essential for accurate simulations of soil organic C stocks and composition at a large scale. With further warming, Australian soils will become more vulnerable to C loss: natural environments > native grazing > cropping > modified grazing.
Anam M. Khan, Paul C. Stoy, James T. Douglas, Martha Anderson, George Diak, Jason A. Otkin, Christopher Hain, Elizabeth M. Rehbein, and Joel McCorkel
Biogeosciences, 18, 4117–4141, https://doi.org/10.5194/bg-18-4117-2021, https://doi.org/10.5194/bg-18-4117-2021, 2021
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Remote sensing has played an important role in the study of land surface processes. Geostationary satellites, such as the GOES-R series, can observe the Earth every 5–15 min, providing us with more observations than widely used polar-orbiting satellites. Here, we outline current efforts utilizing geostationary observations in environmental science and look towards the future of GOES observations in the carbon cycle, ecosystem disturbance, and other areas of application in environmental science.
Lydia Stolpmann, Caroline Coch, Anne Morgenstern, Julia Boike, Michael Fritz, Ulrike Herzschuh, Kathleen Stoof-Leichsenring, Yury Dvornikov, Birgit Heim, Josefine Lenz, Amy Larsen, Katey Walter Anthony, Benjamin Jones, Karen Frey, and Guido Grosse
Biogeosciences, 18, 3917–3936, https://doi.org/10.5194/bg-18-3917-2021, https://doi.org/10.5194/bg-18-3917-2021, 2021
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Our new database summarizes DOC concentrations of 2167 water samples from 1833 lakes in permafrost regions across the Arctic to provide insights into linkages between DOC and environment. We found increasing lake DOC concentration with decreasing permafrost extent and higher DOC concentrations in boreal permafrost sites compared to tundra sites. Our study shows that DOC concentration depends on the environmental properties of a lake, especially permafrost extent, ecoregion, and vegetation.
Gustaf Granath, Christopher D. Evans, Joachim Strengbom, Jens Fölster, Achim Grelle, Johan Strömqvist, and Stephan J. Köhler
Biogeosciences, 18, 3243–3261, https://doi.org/10.5194/bg-18-3243-2021, https://doi.org/10.5194/bg-18-3243-2021, 2021
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We measured element losses and impacts on water quality following a wildfire in Sweden. We observed the largest carbon and nitrogen losses during the fire and a strong pulse of elements 1–3 months after the fire that showed a fast (weeks) and a slow (months) release from the catchments. Total carbon export through water did not increase post-fire. Overall, we observed a rapid recovery of the biogeochemical cycling of elements within 3 years but still an annual net release of carbon dioxide.
Lina Teckentrup, Martin G. De Kauwe, Andrew J. Pitman, and Benjamin Smith
Biogeosciences, 18, 2181–2203, https://doi.org/10.5194/bg-18-2181-2021, https://doi.org/10.5194/bg-18-2181-2021, 2021
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The El Niño–Southern Oscillation (ENSO) describes changes in the sea surface temperature patterns of the Pacific Ocean. This influences the global weather, impacting vegetation on land. There are two types of El Niño: central Pacific (CP) and eastern Pacific (EP). In this study, we explored the long-term impacts on the carbon balance on land linked to the two El Niño types. Using a dynamic vegetation model, we simulated what would happen if only either CP or EP El Niño events had occurred.
Matthias Volk, Matthias Suter, Anne-Lena Wahl, and Seraina Bassin
Biogeosciences, 18, 2075–2090, https://doi.org/10.5194/bg-18-2075-2021, https://doi.org/10.5194/bg-18-2075-2021, 2021
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Grassland ecosystem services like forage production and greenhouse gas storage in the soil depend on plant growth.
In an experiment in the mountains with warming treatments, we found that despite dwindling soil water content, the grassland growth increased with up to +1.3 °C warming (annual mean) compared to present temperatures. Even at +2.4 °C the growth was still larger than at the reference site.
This suggests that plant growth will increase due to global warming in the near future.
Bernice C. Hwang and Daniel B. Metcalfe
Biogeosciences, 18, 1259–1268, https://doi.org/10.5194/bg-18-1259-2021, https://doi.org/10.5194/bg-18-1259-2021, 2021
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Despite growing recognition of herbivores as important ecosystem engineers, many major gaps remain in our understanding of how silicon and herbivory interact to shape biogeochemical processes. We highlight the need for more research particularly in natural settings as well as on the potential effects of herbivory on terrestrial silicon cycling to understand potentially critical animal–plant–soil feedbacks.
Ali Asaadi and Vivek K. Arora
Biogeosciences, 18, 669–706, https://doi.org/10.5194/bg-18-669-2021, https://doi.org/10.5194/bg-18-669-2021, 2021
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More than a quarter of the current anthropogenic CO2 emissions are taken up by land, reducing the atmospheric CO2 growth rate. This is because of the CO2 fertilization effect which benefits 80 % of global vegetation. However, if nitrogen and phosphorus nutrients cannot keep up with increasing atmospheric CO2, the magnitude of this terrestrial ecosystem service may reduce in future. This paper implements nitrogen constraints on photosynthesis in a model to understand the mechanisms involved.
Arianna Peron, Lisa Kaser, Anne Charlott Fitzky, Martin Graus, Heidi Halbwirth, Jürgen Greiner, Georg Wohlfahrt, Boris Rewald, Hans Sandén, and Thomas Karl
Biogeosciences, 18, 535–556, https://doi.org/10.5194/bg-18-535-2021, https://doi.org/10.5194/bg-18-535-2021, 2021
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Drought events are expected to become more frequent with climate change. Along with these events atmospheric ozone is also expected to increase. Both can stress plants. Here we investigate to what extent these factors modulate the emission of volatile organic compounds (VOCs) from oak plants. We find an antagonistic effect between drought stress and ozone, impacting the emission of different BVOCs, which is indirectly controlled by stomatal opening, allowing plants to control their water budget.
Lena Wohlgemuth, Stefan Osterwalder, Carl Joseph, Ansgar Kahmen, Günter Hoch, Christine Alewell, and Martin Jiskra
Biogeosciences, 17, 6441–6456, https://doi.org/10.5194/bg-17-6441-2020, https://doi.org/10.5194/bg-17-6441-2020, 2020
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Mercury uptake by trees from the air represents an important but poorly quantified pathway in the global mercury cycle. We determined mercury uptake fluxes by leaves and needles at 10 European forests which were 4 times larger than mercury deposition via rainfall. The amount of mercury taken up by leaves and needles depends on their age and growing height on the tree. Scaling up our measurements to the forest area of Europe, we estimate that each year 20 t of mercury is taken up by trees.
A. Anthony Bloom, Kevin W. Bowman, Junjie Liu, Alexandra G. Konings, John R. Worden, Nicholas C. Parazoo, Victoria Meyer, John T. Reager, Helen M. Worden, Zhe Jiang, Gregory R. Quetin, T. Luke Smallman, Jean-François Exbrayat, Yi Yin, Sassan S. Saatchi, Mathew Williams, and David S. Schimel
Biogeosciences, 17, 6393–6422, https://doi.org/10.5194/bg-17-6393-2020, https://doi.org/10.5194/bg-17-6393-2020, 2020
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We use a model of the 2001–2015 tropical land carbon cycle, with satellite measurements of land and atmospheric carbon, to disentangle lagged and concurrent effects (due to past and concurrent meteorological events, respectively) on annual land–atmosphere carbon exchanges. The variability of lagged effects explains most 2001–2015 inter-annual carbon flux variations. We conclude that concurrent and lagged effects need to be accurately resolved to better predict the world's land carbon sink.
Erqian Cui, Chenyu Bian, Yiqi Luo, Shuli Niu, Yingping Wang, and Jianyang Xia
Biogeosciences, 17, 6237–6246, https://doi.org/10.5194/bg-17-6237-2020, https://doi.org/10.5194/bg-17-6237-2020, 2020
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Mean annual net ecosystem productivity (NEP) is related to the magnitude of the carbon sink of a specific ecosystem, while its inter-annual variation (IAVNEP) characterizes the stability of such a carbon sink. Thus, a better understanding of the co-varying NEP and IAVNEP is critical for locating the major and stable carbon sinks on land. Based on daily NEP observations from eddy-covariance sites, we found local indicators for the spatially varying NEP and IAVNEP, respectively.
Taraka Davies-Barnard, Johannes Meyerholt, Sönke Zaehle, Pierre Friedlingstein, Victor Brovkin, Yuanchao Fan, Rosie A. Fisher, Chris D. Jones, Hanna Lee, Daniele Peano, Benjamin Smith, David Wårlind, and Andy J. Wiltshire
Biogeosciences, 17, 5129–5148, https://doi.org/10.5194/bg-17-5129-2020, https://doi.org/10.5194/bg-17-5129-2020, 2020
Rui Cheng, Troy S. Magney, Debsunder Dutta, David R. Bowling, Barry A. Logan, Sean P. Burns, Peter D. Blanken, Katja Grossmann, Sophia Lopez, Andrew D. Richardson, Jochen Stutz, and Christian Frankenberg
Biogeosciences, 17, 4523–4544, https://doi.org/10.5194/bg-17-4523-2020, https://doi.org/10.5194/bg-17-4523-2020, 2020
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We measured reflected sunlight from an evergreen canopy for a year to detect changes in pigments that play an important role in regulating the seasonality of photosynthesis. Results show a strong mechanistic link between spectral reflectance features and pigment content, which is validated using a biophysical model. Our results show spectrally where, why, and when spectral features change over the course of the season and show promise for estimating photosynthesis remotely.
Jarmo Mäkelä, Francesco Minunno, Tuula Aalto, Annikki Mäkelä, Tiina Markkanen, and Mikko Peltoniemi
Biogeosciences, 17, 2681–2700, https://doi.org/10.5194/bg-17-2681-2020, https://doi.org/10.5194/bg-17-2681-2020, 2020
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We assess the relative magnitude of uncertainty sources on ecosystem indicators of the 21st century climate change on two boreal forest sites. In addition to RCP and climate model uncertainties, we included the overlooked model parameter uncertainty and management actions in our analysis. Management was the dominant uncertainty factor for the more verdant southern site, followed by RCP, climate and parameter uncertainties. The uncertainties were estimated with canonical correlation analysis.
Guido Kraemer, Gustau Camps-Valls, Markus Reichstein, and Miguel D. Mahecha
Biogeosciences, 17, 2397–2424, https://doi.org/10.5194/bg-17-2397-2020, https://doi.org/10.5194/bg-17-2397-2020, 2020
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To closely monitor the state of our planet, we require systems that can monitor
the observation of many different properties at the same time. We create
indicators that resemble the behavior of many different simultaneous
observations. We apply the method to create indicators representing the
Earth's biosphere. The indicators show a productivity gradient and a water
gradient. The resulting indicators can detect a large number of changes and
extremes in the Earth system.
Barbara Marcolla, Mirco Migliavacca, Christian Rödenbeck, and Alessandro Cescatti
Biogeosciences, 17, 2365–2379, https://doi.org/10.5194/bg-17-2365-2020, https://doi.org/10.5194/bg-17-2365-2020, 2020
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This work investigates the sensitivity of terrestrial CO2 fluxes to climate drivers. We observed that CO2 flux is mostly controlled by temperature during the growing season and by radiation off season. We also observe that radiation importance is increasing over time while sensitivity to temperature is decreasing in Eurasia. Ultimately this analysis shows that ecosystem response to climate is changing, with potential repercussions for future terrestrial sink and land role in climate mitigation.
Stephanie C. Pennington, Nate G. McDowell, J. Patrick Megonigal, James C. Stegen, and Ben Bond-Lamberty
Biogeosciences, 17, 771–780, https://doi.org/10.5194/bg-17-771-2020, https://doi.org/10.5194/bg-17-771-2020, 2020
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Soil respiration (Rs) is the flow of CO2 from the soil surface to the atmosphere and is one of the largest carbon fluxes on land. This study examined the effect of local basal area (tree area) on Rs in a coastal forest in eastern Maryland, USA. Rs measurements were taken as well as distance from soil collar, diameter, and species of each tree within a 15 m radius. We found that trees within 5 m of our sampling points had a positive effect on how sensitive soil respiration was to temperature.
Keri L. Bowering, Kate A. Edwards, Karen Prestegaard, Xinbiao Zhu, and Susan E. Ziegler
Biogeosciences, 17, 581–595, https://doi.org/10.5194/bg-17-581-2020, https://doi.org/10.5194/bg-17-581-2020, 2020
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We examined the effects of season and tree harvesting on the flow of water and the organic carbon (OC) it carries from boreal forest soils. We found that more OC was lost from the harvested forest because more precipitation reached the soil surface but that during periods of flushing in autumn and snowmelt a limit on the amount of water-extractable OC is reached. These results contribute to an increased understanding of carbon loss from boreal forest soils.
Jason Philip Kaye, Susan L. Brantley, Jennifer Zan Williams, and the SSHCZO team
Biogeosciences, 16, 4661–4669, https://doi.org/10.5194/bg-16-4661-2019, https://doi.org/10.5194/bg-16-4661-2019, 2019
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Interdisciplinary teams can only capitalize on innovative ideas if members work well together through collegial and efficient use of field sites, instrumentation, samples, data, and model code. Thus, biogeoscience teams may benefit from developing a set of best practices for collaboration. We present one such example from a the Susquehanna Shale Hills critical zone observatory. Many of the themes from our example are universal, and they offer insights useful to other biogeoscience teams.
Anne Alexandre, Elizabeth Webb, Amaelle Landais, Clément Piel, Sébastien Devidal, Corinne Sonzogni, Martine Couapel, Jean-Charles Mazur, Monique Pierre, Frédéric Prié, Christine Vallet-Coulomb, Clément Outrequin, and Jacques Roy
Biogeosciences, 16, 4613–4625, https://doi.org/10.5194/bg-16-4613-2019, https://doi.org/10.5194/bg-16-4613-2019, 2019
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This calibration study shows that despite isotope heterogeneity along grass leaves, the triple oxygen isotope composition of bulk leaf phytoliths can be estimated from the Craig and Gordon model, a mixing equation and a mean leaf water–phytolith fractionation exponent (lambda) of 0.521. The results strengthen the reliability of the 17O–excess of phytoliths to be used as a proxy of atmospheric relative humidity and open tracks for its use as an imprint of leaf water 17O–excess.
Lina Teckentrup, Sandy P. Harrison, Stijn Hantson, Angelika Heil, Joe R. Melton, Matthew Forrest, Fang Li, Chao Yue, Almut Arneth, Thomas Hickler, Stephen Sitch, and Gitta Lasslop
Biogeosciences, 16, 3883–3910, https://doi.org/10.5194/bg-16-3883-2019, https://doi.org/10.5194/bg-16-3883-2019, 2019
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This study compares simulated burned area of seven global vegetation models provided by the Fire Model Intercomparison Project (FireMIP) since 1900. We investigate the influence of five forcing factors: atmospheric CO2, population density, land–use change, lightning and climate.
We find that the anthropogenic factors lead to the largest spread between models. Trends due to climate are mostly not significant but climate strongly influences the inter-annual variability of burned area.
Marcos A. S. Scaranello, Michael Keller, Marcos Longo, Maiza N. dos-Santos, Veronika Leitold, Douglas C. Morton, Ekena R. Pinagé, and Fernando Del Bon Espírito-Santo
Biogeosciences, 16, 3457–3474, https://doi.org/10.5194/bg-16-3457-2019, https://doi.org/10.5194/bg-16-3457-2019, 2019
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The coarse dead wood component of the tropical forest carbon pool is rarely measured. For the first time, we developed models for predicting coarse dead wood in Amazonian forests by using airborne laser scanning data. Our models produced site-based estimates similar to independent field estimates found in the literature. Our study provides an approach for estimating coarse dead wood pools from remotely sensed data and mapping those pools over large scales in intact and degraded forests.
James Brennan, Jose L. Gómez-Dans, Mathias Disney, and Philip Lewis
Biogeosciences, 16, 3147–3164, https://doi.org/10.5194/bg-16-3147-2019, https://doi.org/10.5194/bg-16-3147-2019, 2019
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We estimate the uncertainties associated with three global satellite-derived burned area estimates. The method provides unique uncertainties for the three estimates at the global scale for 2001–2013. We find uncertainties of 4 %–5.5 % in global burned area and uncertainties of 8 %–10 % in the frequently burning regions of Africa and Australia.
Alexander J. Norton, Peter J. Rayner, Ernest N. Koffi, Marko Scholze, Jeremy D. Silver, and Ying-Ping Wang
Biogeosciences, 16, 3069–3093, https://doi.org/10.5194/bg-16-3069-2019, https://doi.org/10.5194/bg-16-3069-2019, 2019
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This study presents an estimate of global terrestrial photosynthesis. We make use of satellite chlorophyll fluorescence measurements, a visible indicator of photosynthesis, to optimize model parameters and estimate photosynthetic carbon uptake. This new framework incorporates nonlinear, process-based understanding of the link between fluorescence and photosynthesis, an advance on past approaches. This will aid in the utility of fluorescence to quantify terrestrial carbon cycle feedbacks.
Sophie V. J. van der Horst, Andrew J. Pitman, Martin G. De Kauwe, Anna Ukkola, Gab Abramowitz, and Peter Isaac
Biogeosciences, 16, 1829–1844, https://doi.org/10.5194/bg-16-1829-2019, https://doi.org/10.5194/bg-16-1829-2019, 2019
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Measurements of surface fluxes are taken around the world and are extremely valuable for understanding how the land and atmopshere interact, and how the land can amplify temerature extremes. However, do these measurements sample extreme temperatures, or are they biased to the average? We examine this question and highlight data that do measure surface fluxes under extreme conditions. This provides a way forward to help model developers improve their models.
Friederike Gerschlauer, Gustavo Saiz, David Schellenberger Costa, Michael Kleyer, Michael Dannenmann, and Ralf Kiese
Biogeosciences, 16, 409–424, https://doi.org/10.5194/bg-16-409-2019, https://doi.org/10.5194/bg-16-409-2019, 2019
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Mount Kilimanjaro is an iconic environmental asset under serious threat due to increasing human pressures and climate change constraints. We studied variations in the stable isotopic composition of carbon and nitrogen in plant, litter, and soil material sampled along a strong land-use and altitudinal gradient. Our results show that, besides management, increasing temperatures in a changing climate may promote carbon and nitrogen losses, thus altering the stability of Kilimanjaro ecosystems.
Boaz Hilman, Jan Muhr, Susan E. Trumbore, Norbert Kunert, Mariah S. Carbone, Päivi Yuval, S. Joseph Wright, Gerardo Moreno, Oscar Pérez-Priego, Mirco Migliavacca, Arnaud Carrara, José M. Grünzweig, Yagil Osem, Tal Weiner, and Alon Angert
Biogeosciences, 16, 177–191, https://doi.org/10.5194/bg-16-177-2019, https://doi.org/10.5194/bg-16-177-2019, 2019
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Combined measurement of CO2 / O2 fluxes in tree stems suggested that on average 41 % of the respired CO2 was not emitted locally to the atmosphere. This finding strengthens the recognition that CO2 efflux from tree stems is not an accurate measure of respiration. The CO2 / O2 fluxes did not vary as expected if CO2 dissolution in the xylem sap was the main driver for the CO2 retention. We suggest the examination of refixation of respired CO2 as a possible mechanism for CO2 retention.
Gitta Lasslop, Thomas Moeller, Donatella D'Onofrio, Stijn Hantson, and Silvia Kloster
Biogeosciences, 15, 5969–5989, https://doi.org/10.5194/bg-15-5969-2018, https://doi.org/10.5194/bg-15-5969-2018, 2018
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We apply a multivariate model evaluation to the relationship between climate, vegetation and fire in the tropics using the JSBACH land surface model and two remote-sensing data sets, with the aim to identify the potential for model improvement. The overestimation of tree cover for low precipitation and a very strong relationship between tree cover and burned area indicates opportunities in the improvement of drought effects and the impact of fire on tree cover or the adaptation of trees to fire.
Cited articles
Ahmad, I. and Maathuis, F. J. M.: Cellular and tissue distribution of potassium: physiological relevance, mechanisms and regulation, J. Plant Physiol., 171, 708–714, https://doi.org/10.1016/j.jplph.2013.10.016, 2014.
Ahuja, L., Naney, J., Green, R., and Nielsen, D.: Macroporosity to characterize spatial variability of hydraulic conductivity and effects of land management, Soil Sci. Soc. Am. J., 48, 699–702, 1984.
Aidar, M., Schmidt, S., Moss, G., Stewart, G., and Joly, C.: Nitrogen use strategies of neotropical rainforest trees in threatened Atlantic Forest, Plant Cell Environ., 26, 389–399, 2003.
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop Evapotranspiration – Guidelines for Computing Crop Water Requirements – FAO Irrigation and Drainage Paper 56, FAO, Rome, 300, 6541, 1998.
Alvarez-Clare, S., Mack, M., and Brooks, M.: A direct test of nitrogen and phosphorus limitation to net primary productivity in a lowland tropical wet forest, Ecology, 94, 1540–1551, 2013.
Anderson, J. M. and Ingram, J. S. I.: Tropical Soil Biology and Fertility: a Handbook of Methods, CAB International, Wallingford, UK, 1–221, 1993.
Anschütz, U., Becker, D., and Shabala, S.: Going beyond nutrition: regulation of potassium homoeostasis as a common denominator of plant adaptive responses to environment, J. Plant Physiol., 171, 670–687, https://doi.org/10.1016/j.jplph.2014.01.009, 2014.
Araujo-Murakami, A., Doughty, C. E., Metcalfe, D. B., Silva-Espejo, J. E., Arroyo, L., Heredia, J. P., Flores, M., Sibler, R., Mendizabal, L. M., and Pardo-Toledo, E.: The productivity, allocation and cycling of carbon in forests at the dry margin of the Amazon forest in Bolivia, Plant Ecol. Divers., 7, 55–69, 2014.
Askew, G., Moffatt, D., Montgomery, R., and Searl, P.: Interrelationships of soils and vegetation in the savanna-forest boundary zone of North-Eastern Mato Grosso, Geogr. J., 136, 370–376, 1970.
Avenard, J.-M. and Tricart, J.: Le contact forêt-savane: rôle des régimes hydriques des sols dans l'Ouest de la Côte-d'Ivoire, Ann. Geogr., 81, 421–450, 1972.
Baldeck, C. A., Colgan, M. S., Féret, J. B., Levick, S. R., Martin, R. E., and Asner, G. P.: Landscape-scale variation in plant community composition of an African savanna from airborne species mapping, Ecol. Appl., 24, 84–93, https://doi.org/10.1890/13-0307.1, 2014.
Bartlett, M. K., Scoffoni, C., and Sack, L.: The determinants of leaf turgor loss point and prediction of drought tolerance of species and biomes: a global meta-analysis, Ecol. Lett., 15, 393–405, https://doi.org/10.1111/j.1461-0248.2012.01751.x,, 2012.
Bates, D., Mächler, M., Bolker, B., and Walker, S.: Fitting Linear Mixed-Effects Models Using lme4, Journal of Statistical Software 67(1), https://doi.org/10.18637/jss.v067.i01, 2015.
Beer, C., Ciais, P., Reichstein, M., Baldocchi, D., Law, B., Papale, D., Soussana, J. F., Ammann, C., Buchmann, N., and Frank, D.: Temporal and among-site variability of inherent water use efficiency at the ecosystem level, Global Biogeochem. Cy., 23, 1–13, 2009.
Ben-Shahar, R.: Abundance of trees and grasses in a woodland savanna in relation to environmental factors, J. Veg. Sci., 2, 345–350, https://doi.org/10.2307/3235926, 1991.
Bevington, P. R. and Robinson, D. K.: Data Reduction and Error Analysis for the Physical Sciences, McGraw-Hill, New York, 336 pp., 1969.
Bird, M. I., Veenendaal, E. M., and Lloyd, J. J.: Soil carbon inventories and δ13C along a moisture gradient in Botswana, Glob. Change Biol., 10, 342–349, https://doi.org/10.1046/j.1365-2486.2003.00695.x, 2004.
Bloomfield, K. J.: The Nature of Photosynthetic Phosphorus Limitations for Tropical Tree Species, Ph.D. thesis, School of Geography, University of Leeds, 160 pp., 2012.
Bloomfield, K. J., Domingues, T. F., Saiz, G., Bird, M. I., Crayn, D. M., Ford, A., Metcalfe, D. J., Farquhar, G. D., and Lloyd, J.: Contrasting photosynthetic characteristics of forest vs. savanna species (Far North Queensland, Australia), Biogeosciences, 11, 7331–7347, https://doi.org/10.5194/bg-11-7331-2014, 2014.
Bond, W. J.: What limits trees in C4 grasslands and savannas?, Annu. Rev. Ecol. Evol. S., 39, 641–659, 2008.
Bond, W. J.: Do nutrient-poor soils inhibit development of forests? A nutrient stock analysis, Plant Soil, 334, 47–60, https://doi.org/10.1007/s11104-010-0440-0, 2010.
Borchert, R. and Pockman, W. T.: Water storage capacitance and xylem tension in isolated branches of temperate and tropical trees, Tree Physiol., 25, 457–466, https://doi.org/10.1093/treephys/25.4.457, 2005.
Braun, H. J., Versteegh, C., and Böhme, H.: Holz-Bautypen tropischer Bäume und ihre Einordnung in die Organisation des Hydrosystems, Holzforschung, 22, 16–21, 1968.
Breimer, R. F., Van Kekem, A., and Van Reuler, H.: Guidelines for soil survey and land evaluation in ecological research, Unesco, 125 pp., 1986.
Briggs, R. D.: Site Classification Field Guide, Maine Agriculture and Forest Experiment Station, 15 pp., 1994.
Britto, D. T. and Kronzucker, H. J.: Ecological significance and complexity of N-source preference in plants, Ann. Bot.-London, 112, 957–963, https://doi.org/10.1093/aob/mct157, 2013.
Brooks, R. and Corey, A.: Hydraulic properties of porous media, Hydrology Papers, Colorado State University, 37 pp., 1964.
Buckley, T. N., Miller, J. D., and Farquhar, G. D.: The mathematics of linked optimisation for water and nitrogen use in a canopy, Silva Fenn., 36, 639–669, 2002.
Cawson, J., Sheridan, G., Smith, H., and Lane, P.: Surface runoff and erosion after prescribed burning and the effect of different fire regimes in forests and shrublands: a review, Int. J. Wildland Fire, 21, 857–872, 2012.
Cernusak, L. A., Hutley, L. B., Beringer, J., Holtum, J. A., and Turner, B. L.: Photosynthetic physiology of eucalypts along a sub-continental rainfall gradient in northern Australia, Agr. Forest Meteorol., 151, 1462–1470, 2011.
Clegg, B. and O'Connor, T.: The vegetation of Malilangwe Wildlife Reserve, south-eastern Zimbabwe, Afr. J. Range For. Sci., 29, 109–131, 2012.
Cleveland, C. C., Townsend, A. R., Taylor, P., Alvarez-Clare, S., Bustamante, M. M. C., Chuyong, G., Dobrowski, S. Z., Grierson, P., Harms, K. E., Houlton, B. Z., Marklein, A., Parton, W., Porder, S., Reed, S. C., Sierra, C. A., Silver, W. L., Tanner, E. V. J., and Wieder, W. R.: Relationships among net primary productivity, nutrients and climate in tropical rain forest: a pan-tropical analysis, Ecol. Lett., 14, 939–947, https://doi.org/10.1111/j.1461-0248.2011.01658.x, 2011.
Cochrane, T. T.: Chemical properties of native savanna and forest soils in central Brazil, Soil Sci. Soc. Am. J., 53, 139–141, 1989.
Cochrane, T. T. and Cochrane, T. A.: Amazon Forest and Savanna lands: A Guide to the Climates, Vegetation, Landscapes and Soils of Central Tropical South America, CreateSpace, 188 pp., 2010.
Coetzee, B., Meulen, F., Zwanziger, S., Gonsalves, P., and Weisser, P.: A phytosociological classification of the Nylsvley Nature Reserve, Bothalia, 12, 137–160, 1976.
Cole, M. M.: Cerrado, Caatinga and Pantanal: the distribution and origin of the savanna vegetation of Brazil, Geogr. J., 126, 168–179, 1960.
Cole, M. M.: The Savannas, Biogeography and Geobotany, Academic Press, 438 pp., 1986.
Collins, D. B. G. and Bras, R. L.: Plant rooting strategies in water-limited ecosystems, Water Resour. Res., 43, W06407, https://doi.org/10.1029/2006WR005541, 2007.
Comins, H. and McMurtrie, R.: Long-term response of nutrient-limited forests to CO2 enrichment; equilibrium behavior of plant-soil models, B. Ecol. Soc. Am., 3, 666–681, 1993.
Cook, G.: The fate of nutrients during fires in a tropical savanna, Aust. J. Ecol., 19, 359–365, 1994.
Coughenour, M. B. and Ellis, J. E.: Landscape and climatic control of woody vegetation in a dry tropical ecosystem: Turkana District, Kenya, J. Biogeogr., 20, 383–398, 1993.
Cronje, H. P., Panagos, M. D., and Reilly, B. K.: The plant communities of the Andover Game Reserve, South Africa: original research, Koedoe: African Protected Area Conservation and Science, 50, 184–201, 2008.
Daly, D. C. and Mitchell, J. D.: Lowland vegetation of tropical South America – an overview, in: Imperfect Balance Landscape Transformations in the Pre-Columbian Americas, edited by: Lentz, D., Columbia University Press, New York, 391–454, 2000.
Dantas, V. D. L., Batalha, M. A., França, H., and Pausas, J. G.: Resource availability shapes fire-filtered savannas, J. Veg. Sci., 26, 395–403, https://doi.org/10.1111/jvs.12247, 2015.
de Assis, A., Coelho, R., da Silva Pinheiro, E., and Durigan, G.: Water availability determines physiognomic gradient in an area of low-fertility soils under Cerrado vegetation, Plant Ecol., 212, 1135–1147, https://doi.org/10.1007/s11258-010-9893-8, 2011.
DeBano, L. F.: The role of fire and soil heating on water repellency in wildland environments: a review, J. Hydrol., 231, 195–206, 2000.
de Gannes, V., Eudoxie, G., and Hickey, W. J.: Impacts of edaphic factors on communities of ammonia-oxidizing archaea, ammonia-oxidizing bacteria and nitrification in tropical soils, Plos One, 9 (2), e89568, https://doi.org/10.1371/journal.pone.0089568, 2014.
de Moraes, J. M., Schuler, A. E., Dunne, T., Figueiredo, R. D. O., and Victoria, R. L.: Water storage and runoff processes in plinthic soils under forest and pasture in eastern Amazonia, Hydrol. Process., 20, 2509–2526, https://doi.org/10.1002/hyp.6213, 2006.
Dent, D. and Young, A.: Soil Survey and Land Evaluation, George Allen & Unwin., 278 pp., 1981.
Diouf, A., Barbier, N., Lykke, A. M., Couteron, P., Deblauwe, V., Mahamane, A., Saadou, M., and Bogaert, J.: Relationships between fire history, edaphic factors and woody vegetation structure and composition in a semi-arid savanna landscape (Niger, West Africa), Appl. Veg. Sci., 15, 488–500, https://doi.org/10.1111/j.1654-109X.2012.01187.x, 2012.
Domingues, T. F., Berry, J. A., Martinelli, L. A., Ometto, J. P. H. B., and Ehleringer, J. R.: Parameterization of canopy structure and leaf-level gas exchange for an Amazonian tropical rain forest (Tapajós National Forest, Pará, Brazil), Earth Interact., 9, 1–23, https://doi.org/10.1175/EI149.1, 2005.
Domingues, T. F., Meir, P., Feldpausch, T. R., Saiz, G., Veenendaal, E. M., Schrodt, F., Bird, M., Djagbletey, G., Hien, F., Compaore, H., Diallo, A., Grace, J., and Lloyd, J.: Co-limitation of photosynthetic capacity by nitrogen and phosphorus in West Africa woodlands, Plant Cell Environ., 33, 959–980, https://doi.org/10.1111/j.1365-3040.2010.02119.x, 2010.
Domingues, T. F., Ishida, F. Y., Feldpausch, T. R., Grace, J., Meir, P., Saiz, G., Sene, O., Schrodt, F., Sonké, B., Taedoumg, H., Veenendaal, E. M., Lewis, S. L., and Lloyd, J.: Biome-specific effects of nitrogen and phosphorus on the photosynthetic characteristics of trees at a forest-savanna boundary in Cameroon, Oecologia, 178, 659–672, https://doi.org/10.1007/s00442-015-3250-5, 2015.
Doughty, C. E., Malhi, Y., Araujo-Murakami, A., Metcalfe, D. B., Silva-Espejo, J. E., Arroyo, L., Heredia, J. P., Pardo-Toledo, E., Mendizabal, L. M., and Rojas-Landivar, V. D.: Allocation trade-offs dominate the response of tropical forest growth to seasonal and interannual drought, Ecology, 95, 2192–2201, 2014.
Dowling, A. J., Webb, A. A., and Scanlan, J. C.: Surface soil chemical and physical patterns in a Brigalow–Dawson gum forest, Central Queensland, Aust. J. Ecol., 11, 155–162, https://doi.org/10.1111/j.1442-9993.1986.tb01386.x, 1986.
Dunin, F. and Aston, A.: The development and proving of models of large scale evapotranspiration: an Australian study, Agr. Water Manage., 8, 305–323, 1984.
Durigan, G. and Ratter, J. A.: Successional changes in cerrado and cerrado/forest ecotonal vegetation in Western São Paulo State, Brazil, 1962–2000, Edin. J. Bot., 63, 119–130, https://doi.org/10.1017/S0960428606000357, 2006.
Dye, P. and Walker, B.: Vegetation–environment relations on sodic soils of Zimbabwe Rhodesia, J. Ecol., 68, 589–606, 1980.
Egilla, J. N., Davies, F. T. J., and Drew, M. C.: Effect of potassium on drought resistance of Hibiscus rosa-sinensis cv. Leprechaun: plant growth, leaf macro- and micronutrient content and root longevity, Plant Soil, 229, 213–224, https://doi.org/10.1023/A:1004883032383, 2001.
Egilla, J. N., Davies, F. T. J., and Boutton, T. W.: Drought stress influences leaf water content, photosynthesis, and water-use efficiency of Hibiscus rosa-sinensis at three potassium concentrations, Photosynthetica, 43, 135–140, https://doi.org/10.1007/s11099-005-5140-2, 2005.
Eiten, G.: Delimitation of the cerrado concept, Plant Ecol., 36, 169–178, https://doi.org/10.1007/bf02342599, 1978.
El-Mesbahi, M. N., Azcon, R., Ruiz-Lozano, J. M., and Aroca, R.: Plant potassium content modifies the effects of arbuscular mycorrhizal symbiosis on root hydraulic properties in maize plants, Mycorrhiza, 22, 555–564, https://doi.org/10.1007/s00572-012-0433-3, 2012.
Farquhar, G. D., Ehleringer, J. R., and Hubick, K. T.: Carbon isotope discrimination and photosynthesis, Annu. Rev. Plant Phys., 40, 503–537, 1989.
Farquhar, G. D., Buckley, T. N., and Miller, J. M.: Optimal stomatal control in relation to leaf area and nitrogen content, Silva Fenn., 36, 625–637, 2002.
Favier, C., Aleman, J., Bremond, L., Dubois, M. A., Freycon, V., and Yangakola, J.-M.: Abrupt shifts in African savanna tree cover along a climatic gradient, Global Ecol. Biogeogr., 21, 787–797, https://doi.org/10.1111/j.1466-8238.2011.00725.x, 2012.
Feldpausch, T. R., Banin, L., Phillips, O. L., Baker, T. R., Lewis, S. L., Quesada, C. A., Affum-Baffoe, K., Arets, E. J. M. M., Berry, N. J., Bird, M., Brondizio, E. S., de Camargo, P., Chave, J., Djagbletey, G., Domingues, T. F., Drescher, M., Fearnside, P. M., França, M. B., Fyllas, N. M., Lopez-Gonzalez, G., Hladik, A., Higuchi, N., Hunter, M. O., Iida, Y., Salim, K. A., Kassim, A. R., Keller, M., Kemp, J., King, D. A., Lovett, J. C., Marimon, B. S., Marimon-Junior, B. H., Lenza, E., Marshall, A. R., Metcalfe, D. J., Mitchard, E. T. A., Moran, E. F., Nelson, B. W., Nilus, R., Nogueira, E. M., Palace, M., Patiño, S., Peh, K. S.-H., Raventos, M. T., Reitsma, J. M., Saiz, G., Schrodt, F., Sonké, B., Taedoumg, H. E., Tan, S., White, L., Wöll, H., and Lloyd, J.: Height-diameter allometry of tropical forest trees, Biogeosciences, 8, 1081–1106, https://doi.org/10.5194/bg-8-1081-2011, 2011.
Feng, X., Vico, G., and Porporato, A.: On the effects of seasonality on soil water balance and plant growth, Water Resour. Res., 48, W05543, https://doi.org/10.1029/2011WR011263, 2012.
Fraser, S., Van Rooyen, T., and Verster, E.: Soil–plant relationships in the central Kruger National Park, Koedoe, 30, 19–34, 1987.
Fromm, J.: Wood formation of trees in relation to potassium and calcium nutrition, Tree Physiol., 30, 1140–1147, https://doi.org/10.1093/treephys/tpq024, 2010.
Funk, J. L., Glenwinkel, L. A., and Sack, L.: Differential allocation to photosynthetic and non-photosynthetic nitrogen fractions among native and invasive species, PloS one, 8, e64502, https://doi.org/10.1371/journal.pone.0064502, 2013
Furley, P. A. and Ratter, J. A.: Soil resources and plant communities of the central Brazilian cerrado and their development, J. Biogeogr., 15, 97–108, 1988.
Fyllas, N. M., Patiño, S., Baker, T. R., Bielefeld Nardoto, G., Martinelli, L. A., Quesada, C. A., Paiva, R., Schwarz, M., Horna, V., Mercado, L. M., Santos, A., Arroyo, L., Jiménez, E. M., Luizão, F. J., Neill, D. A., Silva, N., Prieto, A., Rudas, A., Silviera, M., Vieira, I. C. G., Lopez-Gonzalez, G., Malhi, Y., Phillips, O. L., and Lloyd, J.: Basin-wide variations in foliar properties of Amazonian forest: phylogeny, soils and climate, Biogeosciences, 6, 2677–2708, https://doi.org/10.5194/bg-6-2677-2009, 2009.
Fyllas, N. M., Quesada, C. A., and Lloyd, J.: Deriving plant functional types for Amazonian forests for use in vegetation dynamics models, Perspect. Plant Ecol., 14, 97–110, https://doi.org/10.1016/j.ppees.2011.11.001, 2012.
Fyllas, N. M., Gloor, E., Mercado, L. M., Sitch, S., Quesada, C. A., Domingues, T. F., Galbraith, D. R., Torre-Lezama, A., Vilanova, E., Ramírez-Angulo, H., Higuchi, N., Neill, D. A., Silveira, M., Ferreira, L., Aymard C., G. A., Malhi, Y., Phillips, O. L., and Lloyd, J.: Analysing Amazonian forest productivity using a new individual and trait-based model (TFS v.1), Geosci. Model Dev., 7, 1251–1269, https://doi.org/10.5194/gmd-7-1251-2014, 2014.
Gandiwa, E., Zisadza-Gandiwa, P., Goza, D., Mashapa, C., and Muboko, N.: Diversity and structure of woody vegetation across areas with different soils in Gonarezhou National Park, Zimbabwe, South. Forests, 76, 111–116, https://doi.org/10.2989/20702620.2014.921007, 2014.
Gee, G. W. and Bauder, J. W.: Particle-size analysis, in: Methods in Soil Analysis, Part 1, Physical and Mineralogical Methods, edited by: Klute, A., American Society of Agronomy and Soil Science Society of America, Madison, Wisconsin, USA, 383–409, 1986.
Givan, C. V.: Metabolic detoxification of ammonia in tissues of higher plants, Phytochemistry, 18, 375–382, 1979.
Good, S. P. and Caylor, K. K.: Climatological determinants of woody cover in Africa, P. Natl. Acad. Sci. USA, 108, 4902–4907, https://doi.org/10.1073/pnas.1013100108, 2011.
Goodland, R. and Pollard, R.: The Brazilian cerrado vegetation: a fertility gradient, J. Ecol., 61, 219–224, 1973.
Grace, J., Lloyd, J., Miranda, A. C., Miranda, H., and Gash, J. H. C.: Fluxes of carbon dioxide and water vapour over a C4 pasture in southwestern Amazonia (Brazil), Aust. J. Plant Physiol., 25, 519–530, 1998.
Grace, J. B. and Bollen, K. A.: Interpreting the results from multiple regression and structural equation models, Bull. Ecol. Soc. Am., 86, 283–295, 2005.
Grigal, D. F.: A soil-based aspen productivity index for Minnesota, Forest Ecol. Manag., 257, 1465–1473, https://doi.org/10.1016/j.foreco.2008.12.022, 2009.
Guswa, A. J.: The influence of climate on root depth: a carbon cost-benefit analysis, Water Resour. Res., 44, W02427, https://doi.org/10.1029/2007WR006384, 2008.
Guswa, A. J.: Effect of plant uptake strategy on the water – optimal root depth, Water Resour. Res., 46, 1–5, 2010.
Guy, P. R.: Notes on the vegetation types of the Zambezi Valley, Rhodesia, between the Kariba and Mpata gorges, Kirkia, 10, 543–557, 1977.
Guy, P. R.: Changes in the biomass and productivity of woodlands in the Sengwa Wildlife Research Area, Zimbabwe, J. Appl. Ecol., 18, 507–519, https://doi.org/10.2307/2402412, 1981.
Haase, R. and Beck, G.: Structure and composition of savanna vegetation in northern Bolivia: a preliminary report, Brittonia, 41, 80–100, https://doi.org/10.2307/2807594, 1989.
Hafsi, C., Debez, A., and Abdelly, C.: Potassium deficiency in plants: effects and signaling cascades, Acta Physiol. Plant, 36, 1055–1070, https://doi.org/10.1007/s11738-014-1491-2, 2014.
Halliwell, B.: Chloroplast Metabolism, The Structure and Function of Chloroplasts in Green Leaf Cells, Clarendon Press, Oxford,257 pp., 1981.
Hanan, N. P., Tredennick, A. T., Prihodko, L., Bucini, G., and Dohn, J.: Analysis of stable states in global savannas: is the CART pulling the horse?, Global Ecol. Biogeogr., 23, 259–263, 2013.
Hänsch, R. and Mendel, R. R.: Physiological functions of mineral micronutrients (Cu, Zn, Mn, Fe, Ni, Mo, B, Cl), Curr. Opin. Plant Biol., 12, 259–266, 2009.
Hart, C.: Relative humidity, EMC, and collapse shrinkage in wood, Forest Prod. J., 32, 45–54, 1984.
Hedley, M. J., Stewart, J. W. B., and Chauhan, B. S.: Changes in inorganic and organic soil phosphorus fractions induced by cultivation practices and by laboratory incubations, Soil Sci. Soc. Am. J., 46, 970–976, 1982.
Hietz, P., Horsky, M., Prohaska, T., Lang, I., and Grabner, M.: High-resolution densitometry and elemental analysis of tropical wood, Trees, 1–11, 2014.
Hijmans, R. J., Cameron, S. E., Parra, J. L., Jones, P. G., and Jarvis, A.: Very high resolution interpolated climate surfaces for global land areas, Int. J. Climatol., 25, 1965–1978, https://doi.org/10.1002/joc.1276, 2005.
Hirota, M., Holmgren, M., Van Nes, E. H., and Scheffer, M.: Global resilience of tropical forest and savanna to critical transitions, Science, 334, 232–235, https://doi.org/10.1126/science.1210657, 2011.
Hodnett, M. G. and Tomasella, J.: Marked differences between van Genuchten soil water-retention parameters for temperate and tropical soils a new water-retention pedo-transfer functions developed for tropical soils, Geoderma, 108, 155–180, https://doi.org/10.1016/S0016-7061(02)00105-2, 2002.
Hoffmann, W. A., Franco, A. C., Moreira, M. Z., and Haridasan, M.: Specific leaf area explains differences in leaf traits between congeneric savanna and forest trees, Funct. Ecol., 19, 932–940, 2005.
Hoffmann, W. A., Geiger, E. L., Gotsch, S. G., Rossatto, D. R., Silva, L. C., Lau, O. L., Haridasan, M., and Franco, A. C.: Ecological thresholds at the savanna-forest boundary: how plant traits, resources and fire govern the distribution of tropical biomes, Ecol. Lett., 15, 759–768, 2012.
Hollander, M. and Wolfe, D. A.: Nonparametric Statistical Methods, J. Wiley & Sons, New York, 816 pp., 1999.
Kenzo, T., Ichie, T., Watanabe, Y., Yoneda, R., Nonomiya, I., and Koike, T.: Changes in photosynthesis and leaf characteristics with tree height in five diperocarp species in a tropical rain forest, Tree Physiol., 26, 865–873, https://doi.org/10.1093/treephys/26.7.865, 2006.
Killeen, T. J., Jardim, A., Mamani, F., and Rojas, N.: Diversity, composition and structure of a tropical semideciduous forest in the Chiquitania region of Santa Cruz, Bolivia, J. Trop. Ecol., 14, 803–827, 1998.
Killeen, T. J., Chavez, E., Peña-Claros, M., Toledo, M., Arroyo, L., Caballero, J., Correa, L., Guillén, R., Quevedo, R., and Saldias, M.: The Chiquitano dry forest, the transition between humid and dry forest in eastern lowland Bolivia, in: Neotropical Savannas and Seasonally Dry Forests: Plant Diversity, Biogeography, and Conservation, edited by: Pennington, R. T., Lewis, G. P., and Ratter, J. A., CRC Press, Boca Rato, 213–233, 2006.
Kim, Y., Knox, R. G., Longo, M., Medvigy, D., Hutyra, L. R., Pyle, E. H., Wofsy, S. C., Bras, R. L., and Moorcroft, P. R.: Seasonal carbon dynamics and water fluxes in an Amazon rainforest, Glob. Change Biol., 18, 1322–1334, https://doi.org/10.1111/j.1365-2486.2011.02629.x, 2012.
Kloke, J.D., and Mckean, J.W.: Rfit: Rank-based estimation for linear models, The R Journal, 4, 57–64, 2012.
Kronzucker, H., Coskun, D., Schulze, L., Wong, J., and Britto, D.: Sodium as nutrient and toxicant, Plant Soil, 369, 1–23, https://doi.org/10.1007/s11104-013-1801-2, 2013.
Kugbe, J., Fosu, M., and Vlek, P. G.: Impact of season, fuel load and vegetation cover on fire mediated nutrient losses across savanna agro-ecosystems: the case of northern Ghana, Nutr. Cycl. Agroecosys., https://doi.org/10.1007/s10705-014-9635-8, 2014.
Le Roux, C., Grunow, J., Morris, J., Bredenkamp, G., and Scheepers, J.: Classification of the vegetation of the Etosha National Park, S. Afr. J. Bot., 54, 1–10, 1988.
Lebaudy, A., Vavasseur, A., Hosy, E., Dreyer, D., Leonhardt, N., Thibaud, J. B., Véry, A.-A., Simonneau, T., and Hervé, S.: Plant adaptation to fluctuating environment and biomass production are strongly dependent on guard cell potassium channels, P. Natl. Acad. Sci. USA, 105, 5271–5276, https://doi.org/10.1073/pnas.0709732105, 2008.
Lehmann, C. E. R., Archibald, S. A., Hoffmann, W. A., and Bond, W. J.: Deciphering the distribution of the savanna biome, New Phytol., 191, 197–209, https://doi.org/10.1111/j.1469-8137.2011.03689.x, 2011.
Lehmann, C. E. R., Anderson, T. M., Sankaran, M., Higgins, S. I., Archibald, S., Hoffmann, W. A., Hanan, N. P., Williams, R. J., Fensham, R. J., Felfili, J.,Hutley, L. B., Ratnam, J., San Jose, J., Montes, R., Franklin, D., Russell-Smith, J., Ryan, C. M., Durigan, G., Hiernaux, P., Haidar, R., Bowman, D. M. J. S., and Bond, W. J.: Savanna vegetation–fire–climate relationships differ among continents, Science, 343, 548–552, 2014.
Leigh, R. A. and Wyn Jones, R. G.: A hypothesis relating critical potassium concentrations for growth to the distribution and function of this ion in the plant cell, New Phytol., 97, 1–13, https://doi.org/10.1111/j.1469-8137.1984.tb04103.x, 1984.
Lloyd, J. and Farquhar, G. D.: 13C discrimination during CO2 assimilation by the terrestrial biosphere, Oecologia, 99, 201–215, https://doi.org/10.1007/bf00627732, 1994.
Lloyd, J., Bird, M. I., Vellen, L., Miranda, A. C., Veenendaal, E. M., Djagbletey, G., Miranda, H. S., Cook, G., and Farquhar, G. D.: Contributions of woody and herbaceous vegetation to tropical savanna ecosystem productivity: a quasi-global estimate, Tree Physiol., 28, 451–468, https://doi.org/10.1093/treephys/28.3.451, 2008.
Lloyd, J., Goulden, M., Ometto, J. P., Fyllas, N. M., Quesada, C. A., and Patino, S.: Ecophysiology of forest and savanna vegetation, in: Amazonia and Climate Change, edited by: Keller, M., Gash, J. and Silva Dias, P., American Geophysical Union, Washington D.C., 463–484, 2009.
Lloyd, J., Patiño, S., Paiva, R. Q., Nardoto, G. B., Quesada, C. A., Santos, A. J. B., Baker, T. R., Brand, W. A., Hilke, I., Gielmann, H., Raessler, M., Luizão, F. J., Martinelli, L. A., and Mercado, L. M.: Optimisation of photosynthetic carbon gain and within-canopy gradients of associated foliar traits for Amazon forest trees, Biogeosciences, 7, 1833–1859, https://doi.org/10.5194/bg-7-1833-2010, 2010.
Lopes, A. and Cox, F.: Cerrado vegetation in Brazil: an edaphic gradient, Agron. J., 69, 828–831, 1977.
Lopez-Gonzalez, G., Lewis, S. L., Burkitt, M., and Phillips, O. L.: ForestPlots net: a web application and research tool to manage and analyse tropical forest plot data, J. Veg. Sci., 22, 610–613, 2011.
Maathuis, F. J. M.: Physiological functions of mineral macronutrients, Curr. Opin. Plant Biol., 12, 250–258, https://doi.org/10.1016/j.pbi.2009.04.003, 2009.
Male, P. S.: Site index studies of established exotic species for the Granite Belt, Research Paper no. 11., Department of Forestry, Queensland, Australia, 36 pp., 1981.
Mantlana, K. B., Arneth, A., Veenendaal, E. M., Wohland, P., Wolski, P., Kolle, O., Wagner, M., and Lloyd, J.: Photosynthetic properties of C4 plants growing in an African savanna/wetland mosaic, J. Exp. Bot., 59, 3941–3952, https://doi.org/10.1093/jxb/ern237, 2008.
Mapaure, I.: The distribution of Colophospermum mopane (Leguminosae: Caesalpinioideae) in Africa, Kirkia, 15, 1–5, 1994.
Marimon, B. S., Lima, E. de S. , Duarte, T., Chieregatto, L., and Ratter, J. A.: Observations on the vegetation of northeastern Mato Grosso, Brazil. IV. An analysis of the Cerrado-Amazonian Forest ecotone, Edin. J. Bot., 63, 323–341, 2006.
Marques, J. J., Schulze, D. G., Curi, N., and Mertzman, S. A.: Trace element geochemistry in Brazilian Cerrado soils, Geoderma, 121, 31–43, 2004.
McKean, J. W., Terpstra, J. T., and Kloke, J. D.: Computational rank-based statistics, Wiley Interdisciplinary Reviews: Computational Statistics, 1, 132–140, https://doi.org/10.1002/wics.29, 2009.
Milewski, A. V. and Mills, A. J.: Does life consistently maximise energy intensity?, Biol. Rev., 85, 859–879, 2010.
Mengel, K. and Arneke, W.-W.: Effect of potassium on the water potential, the pressure potential, the osmotic potential and cell elongation in leaves of Phaseolus vulgaris, Physiol. Plantarum, 54, 402–408, 1982.
Mengel, K., Viro, M., and Hehl, G.: Effect of potassium on uptake and incorporation of ammonium-nitrogen of rice plants, Plant Soil, 44, 547–558, 1976.
Mercado, L. M., Patiño, S., Domingues, T. F., Fyllas, N. M., Weedon, G. P., Sitch, S., Quesada, C. A., Phillips, O. L., Aragão, L. E. O. C., Malhi, Y., Dolman, A. J., Restrepo-Coupe, N., Saleska, S. R., Baker, T. R., Almeida, S., Higuchi, N., and Lloyd, J.: Variations in Amazon forest productivity correlated with foliar nutrients and modelled rates of photosynthetic carbon supply, Philos. T. R. Soc. B, 366, 3316–3329, https://doi.org/10.1098/rstb.2011.0045, 2011.
Mews, H., Marimon, B. S., and Ratter, J. A.: Observations on the vegetation of Mato Grosso, Brazil. V. Changes in the woody species diversity of a forest in the Cerrado–Amazonian forest transition zone and notes on the forests of the region, Edin. J. Bot., 69, 239–253, 2012.
Miller, J. M., Williams, R. J., and Farquhar, G. D.: Carbon isotope discrimination by a sequence of Eucalyptus species along a subcontinental rainfall gradient in Australia, Funct. Ecol., 15, 222–232, https://doi.org/10.1046/j.1365-2435.2001.00508.x, 2001.
Mills, A. J. , and Fey, M.: Frequent fires intensify soil crusting: physicochemical feedback in the pedoderm of long-term burn experiments in South Africa, Geoderma, 121, 45–64, 2004.
Mills, A. J., Rogers, K. H., Stalmans, M., and Witkowski, E. T. F.: A framework for exploring the determinants of savanna and grassland distribution, Bioscience, 56, 579–589, 2006.
Mills, A. J., Milewski, A. V., Fey, M. V., Gröngröft, A., Petersen, A., and Sirami, C.: Constraint on woody cover in relation to nutrient content of soils in western southern Africa, Oikos, 122, 136–148, https://doi.org/10.1111/j.1600-0706.2012.20417.x, 2013.
Miranda, A. C., Miranda, H. S., Lloyd, J., Grace, J., Francey, R. J., McIntyre, J. A., Meir, P., Riggan, P., Lockwood, R., and Brass, J.: Fluxes of carbon, water and energy over Brazilian cerrado: an analysis using eddy covariance and stable isotopes, Plant Cell Environ., 20, 315–328, https://doi.org/10.1046/j.1365-3040.1997.d01-80.x, 1997.
Mlambo, D.: Influence of soil fertility on the physiognomy of the African savanna tree Colophospermum mopane, Afr. J. Ecol., 45, 109–111, https://doi.org/10.1111/j.1365-2028.2006.00676.x, 2007.
Moene, A. F. and van Dam, J. C.: Transport in the Atmosphere–Vegetation–Soil Continuum, Cambridge University Press, New York, 436 pp., 2014.
Mokany, K., Raison, R. J., and Prokushkin, A. S.: Critical analysis of root: shoot ratios in terrestrial biomes, Glob. Change Biol., 12, 84–96, https://doi.org/10.1111/j.1365-2486.2005.001043.x, 2006.
Morel-Seytoux, H. J., Meyer, P. D., Nachabe, M., Tourna, J., van Genuchten, M. T., and Lenhard, R. J.: Parameter equivalence for the Brooks-Corey and Van Genuchten soil characteristics: preserving the effective capillary drive, Water Resour. Res., 32, 1251–1258, https://doi.org/10.1029/96WR00069, 1996.
Mualem, Y.: A new model for predicting the hydraulic conductivity of unsaturated porous media, Water Resour. Res., 12, 513–522, 1976.
Murdoch, G., Ojo Atere, J., Colborne, G., Olomu, E., and Odugbesan, E.: Soils of the Western State savanna in Nigeria, Vol. 1, The Environment, Land Resource Study (UK), no. 23., 1976.
Murphy, B. P. and Bowman, D. M.: What controls the distribution of tropical forest and savanna?, Ecol. Lett., 15, 748–758, 2012.
Nardoto, G. B., Quesada, C. A., Patiño, S., Saiz, G., Baker, T. R., Schwarz, M., Schrodt, F., Feldpausch, T. R., Domingues, T. F., Marimon, B. S., Marimon Junior, B.-H., Vieira, I. C. G., Silveira, M., Bird, M. I., Phillips, O. L., Lloyd, J., and Martinelli, L. A.: Basin-wide variations in Amazon forest nitrogen-cycling characteristics as inferred from Plant Soil 15N:14N measurements, Plant Ecol. Divers., 7, 173–187, https://doi.org/10.1080/17550874.2013.807524, 2013.
Nelson, D. W. and Sommers, L. E.: Total carbon and total nitrogen, in: Methods of Soil Analysis: Part 3 – Chemical Methods, edited by: Sparks, D. L., SSSA Book Series No 5, American Society of Agronomy/Soil Science Society of America, Madison, WI, 961–1010, 1996.
Norman, J. S. and Barrett, J. E.: Substrate and nutrient limitation of ammonia-oxidizing bacteria and archaea in temperate forest soil, Soil Biol. Biochem., 69, 141–146, https://doi.org/10.1016/j.soilbio.2013.11.003, 2014.
Nyamapfene, K.: A note on some Zimbabwean soil–vegetation relationships of important indicator value in soil survey, Kirkia, 13, 239–242, 1988.
O'Connor, T.: Woody vegetation–environment relations in a semi-arid savanna in the northern Transvaal, S. Afr. J. Bot., 58, 268–274, 1992.
Oliveira-Filho, A. T. and Ratter, J. A.: Vegetation physiognomies and woody flora of the cerrado biome, in: The Cerrados of Brazil. Ecology and Natural History of a Neotropical Savanna, Columbia University Press, 91–120, 2002.
Oliveras, I., Meirelles, S. T., Hirakuri, V. L., Freitas, C. R., Miranda, H. S., and Pivello, V. R.: Effects of fire regimes on herbaceous biomass and nutrient dynamics in the Brazilian savanna, Int. J. Wildland Fire, 22, 368–380, https://doi.org/10.1071/WF10136, 2013.
Olsen, S. R. and Sommers, E. L.: Phosphorus soluble in sodium bicarbonate, in: Methods of Soil Analysis, Part 2, Chemical and Microbiological Properties, edited by: Page, A. L., Miller, RH. H., and Keeney, D. R., American Society of Agronomy, Soil Science Society of America, Madison, WIS, 404–430, 1982.
Osakabe, Y., Arinaga, N., Umezawa, T., Katsura, S., Nagamachi, K., Tanaka, H., Ohiraki, H., Yamada, K., Seo, S.-U., Abo, M., Yoshimura, E., Shinozaki, K., and Yamaguchi-Shinozaki, K.: Osmotic stress responses and plant growth controlled by potassium transporters in arabidopsis, Plant Cell Online, 25, 609–624, https://doi.org/10.1105/tpc.112.105700, 2013.
Ostle, N. J., Smith, P., Fisher, R., Ian Woodward, F., Fisher, J. B., Smith, J. U., Galbraith, D., Levy, P., Meir, P., McNamara, N. P., and Bardgett, R. D.: Integrating plant–soil interactions into global carbon cycle models, J. Ecol., 97, 851–863, https://doi.org/10.1111/j.1365-2745.2009.01547.x, 2009.
Pavlick, R., Drewry, D. T., Bohn, K., Reu, B., and Kleidon, A.: The Jena Diversity-Dynamic Global Vegetation Model (JeDi-DGVM): a diverse approach to representing terrestrial biogeography and biogeochemistry based on plant functional trade-offs, Biogeosciences, 10, 4137–4177, https://doi.org/10.5194/bg-10-4137-2013, 2013.
Pella, E.: Elemental organic analysis, Part 2, State of the art, Am. Lab., 22, 28–32, 1990.
Pennington, R. T., Lewis, G. P., and Ratter, J. A.: An overview of the plant diversity, biogeography and conservation of neotropical savannas and seasonally dry forests, in: Neotropical Savannas and Seasonally Dry Forests: Plant Biodiversity, Biogeography and Conservation, 1–29, 2006.
Pineda-Garcia, F., Paz, H., and Meinzer, F. C.: Drought resistance in early and late secondary successional species from a tropical dry forest: the interplay between xylem resistance to embolism, sapwood water storage and leaf shedding, Plant Cell Environ., 36, 405–418, 2013.
Pleysier, J. L. and Juo, A. S. R.: A single-extraction method using silver-thiourea for measuring exchangeable cations and effective CEC in soils with variable charges, Soil Sci., 129, 205–211, 1980.
Poorter, H. and de Jong, R.: A comparison of specific leaf area, chemical composition and leaf construction costs of field plants from 15 habitats differing in productivity, New Phytol., 143, 163–176, https://doi.org/10.1046/j.1469-8137.1999.00428.x, 1999.
Poorter, H., Niinemets, U., Poorter, L., Wright, I. J., and Villar, R.: Causes and consequences of variation in leaf mass per area (LMA): a meta-analysis, New Phytol., 182, 565–588, https://doi.org/10.1111/j.1469-8137.2009.02830.x, 2009.
Prado, D. E. and Gibbs, P. E.: Patterns of species distributions in the dry seasonal forests of South America, Ann. Mo. Bot. Gard., 80, 902–927, 1993.
Priess, J., Then, C., and Fölster, H.: Litter and fine-root production in three types of tropical premontane rain forest in SE Venezuela, Plant Ecol., 143, 171–187, 1999.
Quesada, C. A. and Lloyd, J.: Soil–vegetation interactions in Amazonia, in: The Large-scale Biosphere–Atmosphere Programme in Amazonia, edited by: Nagy, L., Forsberg, B., and Artaxo, P., Ecological Studies, Springer-Verlag, in press, 2015.
Quesada, C. A., Hodnett, M. G., Breyer, L. M., Santos, A. J. B., Andrade, S., Miranda, H. S., Miranda, A. C., and Lloyd, J.: Seasonal variations in soil water in two woodland savannas of central Brazil with different fire histories, Tree Physiol., 28, 405–415, https://doi.org/10.1093/treephys/28.3.405, 2008.
Quesada, C. A., Lloyd, J., Schwarz, M., Patiño, S., Baker, T. R., Czimczik, C., Fyllas, N. M., Martinelli, L., Nardoto, G. B., Schmerler, J., Santos, A. J. B., Hodnett, M. G., Herrera, R., Luizão, F. J., Arneth, A., Lloyd, G., Dezzeo, N., Hilke, I., Kuhlmann, I., Raessler, M., Brand, W. A., Geilmann, H., Moraes Filho, J. O., Carvalho, F. P., Araujo Filho, R. N., Chaves, J. E., Cruz Junior, O. F., Pimentel, T. P., and Paiva, R.: Variations in chemical and physical properties of Amazon forest soils in relation to their genesis, Biogeosciences, 7, 1515–1541, https://doi.org/10.5194/bg-7-1515-2010, 2010.
Quesada, C. A., Lloyd, J., Anderson, L. O., Fyllas, N. M., Schwarz, M., and Czimczik, C. I.: Soils of Amazonia with particular reference to the RAINFOR sites, Biogeosciences, 8, 1415–1440, https://doi.org/10.5194/bg-8-1415-2011, 2011.
Quesada, C. A., Phillips, O. L., Schwarz, M., Czimczik, C. I., Baker, T. R., Patiño, S., Fyllas, N. M., Hodnett, M. G., Herrera, R., Almeida, S., Alvarez Dávila, E., Arneth, A., Arroyo, L., Chao, K. J., Dezzeo, N., Erwin, T., di Fiore, A., Higuchi, N., Honorio Coronado, E., Jimenez, E. M., Killeen, T., Lezama, A. T., Lloyd, G., López-González, G., Luizão, F. J., Malhi, Y., Monteagudo, A., Neill, D. A., Núñez Vargas, P., Paiva, R., Peacock, J., Peñuela, M. C., Peña Cruz, A., Pitman, N., Priante Filho, N., Prieto, A., Ramírez, H., Rudas, A., Salomão, R., Santos, A. J. B., Schmerler, J., Silva, N., Silveira, M., Vásquez, R., Vieira, I., Terborgh, J., and Lloyd, J.: Basin-wide variations in Amazon forest structure and function are mediated by both soils and climate, Biogeosciences, 9, 2203–2246, https://doi.org/10.5194/bg-9-2203-2012, 2012.
R Core Team: A language and environment for statistical computing, R Foundation for Statistical Computing, Vienna, Austria, 2013.
Ratter, J. A.: Transition between cerrado and forest vegetation in Brazil, in: Nature and Dynamics of Forest–Savanna Boundaries, edited by: Furley, P. A., Proctor, J., and Ratter, J. A., Chapman and Hall, London, 417–430, 1992.
Rawls, W. J., Pachepsky, Y. A., Ritchie, J. C., Sobecki, T. M., and Bloodworth, H.: Effect of soil organic carbon on soil water retention, Geoderma, 116, 61–76, https://doi.org/10.1016/S0016-7061(03)00094-6, 2003.
Rieuwerts, J. S.: The mobility and bioavailability of trace metals in tropical soils: a review, Chem. Spec. Bioavailab., 19, 75–85, 2007.
Ringrose, S., Matheson, W., Wolski, P., and Huntsman-Mapila, P.: Vegetation cover trends along the Botswana Kalahari transect, J. Arid Environ., 54, 297–317, https://doi.org/10.1006/jare.2002.1092, 2003.
Ritchie, M. W. and Hamann, J. D.: Individual-tree height-, diameter-and crown-width increment equations for young Douglas-fir plantations, New Forest., 35, 173–186, 2008.
Robertson, G.: Nitrification and denitrification in humid tropical ecosystems: potential controls on nitrogen retention, in: Mineral nutrients in tropical forest and savanna ecosystems, edited by: Proctor, J. British Ecological Society Special Publication, Blackwell, 9, 55–69, 1989.
Römheld, V. and Kirkby, E. A.: Research on potassium in agriculture: needs and prospects, Plant Soil, 335, 155–180, 2010.
Rossatto, D.: Spatial patterns of species richness and phylogenetic diversity of woody plants in the neotropical savannas of Brazil, Braz. J. Bot, 37, 1–10, https://doi.org/10.1007/s40415-014-0070-5, 2014.
Rossatto, D., Hoffmann, W., de Carvalho Ramos Silva, L., Haridasan, M., Sternberg, L. L., and Franco, A.: Seasonal variation in leaf traits between congeneric savanna and forest trees in Central Brazil: implications for forest expansion into savanna, Trees, 27, 1139–1150, https://doi.org/10.1007/s00468-013-0864-2, 2013.
Russell, J., Moore, A., and Coaldrake, J.: Relationships between subtropical, semiarid forest of Acacia harpophylla (Brigalow), microrelief, and chemical properties of associated gilgai soil, Aust. J. Bot., 15, 481–498, https://doi.org/10.1071/BT9670481, 1967.
Saiz, G., Bird, M. I., Domingues, T., Schrodt, F., Schwarz, M., Feldpausch, T. R., Veenendaal, E., Djagbletey, G., Hien, F., Compaore, H., Diallo, A., and Lloyd, J.: Variation in soil carbon stocks and their determinants across a precipitation gradient in West Africa, Glob. Change Biol., 18, 1670–1683, https://doi.org/10.1111/j.1365-2486.2012.02657.x, 2012.
Sanchez, P. A.: Properties and Management of Soils in the Tropics, Wiley, New York,618 pp., 1976.
Sankaran, M., Hanan, N. P., Scholes, R. J., Ratnam, J., Augine, D. J., Cade, B. S., Gignoux, J., Higgins, S. I., Le Roux, X., Ludwig, F., Ardo, J., Banyikwa, F., Bronn, A., Bucini, G., Caylor, K. K., Coughenour, M. B., Diouf, A., Ekaya, W., Feral, C. J., Feb, E. C., Frost, P. G. H., Hiernaux, P., Hrabar, H., Metzger, K. L., Prins, H. H. T., Ringrose, S., Sea, W., Tews, J., Worden, J., and Zambatis, N.: Determinants of woody cover in African savannas, Nature, 438, 846–849, 2005.
Sankaran, M., Ratnam, J., and Hanan, N.: Woody cover in African savannas: the role of resources, fire and herbivory, Global Ecol. Biogeogr., 17, 236–245, 2008.
Santiago, L. S., Wright, S. J., Harms, K. E., Yavitt, J. B., Korine, C., Garcia, M. N., and Turner, B. L.: Tropical tree seedling growth responses to nitrogen, phosphorus and potassium addition, J. Ecol., 100, 309–316, https://doi.org/10.1111/j.1365-2745.2011.01904.x, 2012.
Sayer, E. J., Wright, S. J., Tanner, E. V., Yavitt, J. B., Harms, K. E., Powers, J. S., Kaspari, M., Garcia, M. N., and Turner, B. L.: Variable responses of lowland tropical forest nutrient status to fertilization and litter manipulation, Ecosystems, 15, 387–400, 2012.
Scheiter, S. and Higgins, S. I.: Impacts of climate change on the vegetation of Africa: an adaptive dynamic vegetation modelling approach, Glob. Change Biol., 15, 2224–2246, https://doi.org/10.1111/j.1365-2486.2008.01838.x, 2009.
Schenk, H. J.: The shallowest possible water extraction profile: a null model for global root distributions, Vadose Zone J., 7, 1119–1124, https://doi.org/10.2136/vzj2007.0119, 2008.
Schenk, H. J. and Jackson, R. B.: Rooting depths, lateral root spreads and below-ground/above-ground allometries of plants in water-limited ecosystems, J. Ecol., 90, 480–494, 2002.
Schmidt, S. and Stewart, G. R.: Transport, storage and mobilization of nitrogen by trees and shrubs in the wet/dry tropics of northern Australia, Tree Physiol., 18, 403–410, https://doi.org/10.1093/treephys/18.6.403, 1998.
Schmimper, A. F. W.: Plant-geography upon a Physiological Basis, Clarendon Press, Oxford, 839 pp., 1903.
Scholtz, R., Kiker, G. A., Smit, I. P. J., and Venter, F. J.: Identifying drivers that influence the spatial distribution of woody vegetation in Kruger National Park, South Africa, Ecosphere, 5, art71, https://doi.org/10.1890/ES14-00034.1, 2014.
Schrodt, F., Domingues, T. F., Feldpausch, T., Saiz, G., Quesada, C. A., Schwarz, M., Ishida, F. Y., Compaore, H., Diallo, A., Djagbletey, G., Hien, F., Hiernaux, P., Mougin, E., Sonké, B., Zapfack, L., Bird, M. I., Lewis, S. L., Meir, P., Phillips, O. L., Grace, J., Veenendaal, E., and Lloyd, J.: Foliar trait contrasts between African forest and savanna trees: genetic versus environmental effects, Funct. Plant Biol., 42, 63–83, https://doi.org/10.1071/FP14040, 2014.
Schulze, E.-D., Williams, R. J., Farquhar, G. D., Schulze, W., Langridge, J., Miller, J. M., and Walker, B. H.: Carbon and nitrogen isotope discrimination and nitrogen nutrition of trees along a rainfall gradient in northern Australia, Funct. Plant Biol., 25, 413–425, https://doi.org/10.1071/PP97113, 1998.
Shabala, S. and Pottosin, I.: Regulation of potassium transport in plants under hostile conditions: implications for abiotic and biotic stress tolerance, Physiol. Plantarum, 151, 257–279, https://doi.org/10.1111/ppl.12165, 2014.
Shukla, M. K.: Soil Physics: an Introduction, 458 pp., CRC Press, 2013.
Silva, J., Fariñas, M., Felfili, J., and Klink, C.: Spatial heterogeneity, land use and conservation in the cerrado region of Brazil, J. Biogeogr., 33, 536–548, 2006.
Silva, L. C., Hoffmann, W. A., Rossatto, D. R., Haridasan, M., Franco, A. C., and Horwath, W. R.: Can savannas become forests? A coupled analysis of nutrient stocks and fire thresholds in central Brazil, Plant Soil, 373, 1–14, 2013.
Skarpe, C.: Plant community structure in relation to grazing and environmental changes along a north–south transect in the western Kalahari, Vegetatio, 68, 3–18, 1986.
Smith, J.: Distribution of tree species in the Sudan in relation to rainfall and soil texture, Suan. Min. Agr. Bull. 4, Agricultural Publications Committee, Khartoum, 1951.
Spicer, R.: Symplasmic networks in secondary vascular tissues: parenchyma distribution and activity supporting long-distance transport, J. Exp. Bot., 65, 1829–1848, https://doi.org/10.1093/jxb/ert459, 2014.
Stamp, N.: Out of the quagmire of plant defense hypotheses, Q. Rev. Biol., 78, 23–55, 2003.
Staver, A. C., Archibald, S., and Levin, S. A.: The global extent and determinants of savanna and forest as alternative biome states, Science, 334, 230–232, https://doi.org/10.1126/science.1210465, 2011.
Steininger, M. K., Tabor, K., Small, J., Pinto, C., Soliz, J., and Chavez, E.: A satellite model of forest flammability, Environ. Manage., 52, 136–150, 2013.
Stewart, G. R., Hegarty, E. E., and Specht, R. L.: Inorganic nitrogen assimilation in plants of Austrlian rainforest communities, Physiol. Plantarum, 74, 26–33, https://doi.org/10.1111/j.1399-3054.1988.tb04936.x, 1988.
Thomas, M. F.: Tropical Geomorphology: a Study of Weathering and Landform Development in Warm Climates, Focal Problems in Geography Series, The McMillan Press, London, 331 pp., 1974.
Thompson, J., Viana, J., Proctor, J., and Ratter, J. A.: Contrasting forest-savanna boundaries on Maraca Island, Roraima, Brazil, in: Nature and Dynamics of Forest-Savanna Boundaries, edited by: Furley, P., Proctor, J., and Ratter, J. A., Chapman and Hall, London, 367–391, 1992.
Tomasella, J. and Hodnett, M. G.: Estimating unsaturated hydraulic conductivity of Brazilian soils using soil–water retention data, Soil Sci., 162, 703–712, 1997.
Torello-Raventos, M., Feldpausch, T. R., Veenendaal, E., Schrodt, F., Saiz, G., Domingues, T. F., Djagbletey, G., Ford, A., Kemp, J., Marimon, B. S., Marimon, B. H., Lenza, E., Ratter, J. A., Maracahipes, L., Sasaki, D., Sonke, B., Zapfack, L., Taedoumg, H., Villarroel, D., Schwarz, M., Quesada, C. A., Ishida, F. Y., Nardoto, G. B., Affum-Baffoe, K., Arroyo, L., Bowman, D. M. J. S., Compaore, H., Davies, K., Diallo, A., Fyllas, N. M., Gilpin, M., Hien, F., Johnson, M., Killeen, T. J., Metcalfe, D., Miranda, H. S., Steininger, M., Thomson, J., Sykora, K., Mougin, E., Hiernaux, P., Bird, M. I., Grace, J., Lewis, S. L., Phillips, O. L., and Lloyd, J.: On the delineation of tropical vegetation types with an emphasis on forest/savanna transitions, Plant Ecol. Divers., 6, 101–137, https://doi.org/10.1080/17550874.2012.762812, 2013.
Trapnell, C. G., Martin, J. D., and Allan, W.: Vegetation-soil map of Northern Rhodesia, 2nd ed., Ministry of Agriculture Lusaka, 1950.
Tripler, C. E., Kaushal, S. S., Likens, G. E., and Todd Walter, M.: Patterns in potassium dynamics in forest ecosystems, Ecol. Lett., 9, 451–466, 2006.
Tsay, Y.-F., Ho, C.-H., Chen, H.-Y., and Lin, S.-H.: Integration of nitrogen and potassium signaling, Annu. Rev. Plant Biol., 62, 207–226, 2011.
Turner, J., Thompson, C., Turvey, N., Hopmans, P., and Ryan, P.: A soil technical classification system for Pinus radiata (D. Don) plantations. I. Development, Aust. J. Soil Res., 28, 797–811, https://doi.org/10.1071/SR9900797, 1990.
Umar, S.: Alleviating adverse effects of water stress on yield of sorghum, mustard and groundnut by potassium application, Pak. J. Bot., 38, 1373–1380, 2006.
VanDerWal, J., Falconi, L., Januchowski, S., Shoo, L., Storlie, C.:SDMTools: Species Distribution Modelling Tools: Tools for processing data associated with species distribution modelling exercises, R package version 1.1-20, 2015.
Van Reeuwijk, L. P.: Procedures for Soil Analysis, 6th edn., International Soil Reference Information Centre, ISRIC, Wageningen, the Netherlands, 120 pp., 2002.
Veenendaal, E. M., Torello-Raventos, M., Feldpausch, T. R., Domingues, T. F., Gerard, F., Schrodt, F., Saiz, G., Quesada, C. A., Djagbletey, G., Ford, A., Kemp, J., Marimon, B. S., Marimon-Junior, B. H., Lenza, E., Ratter, J. A., Maracahipes, L., Sasaki, D., Sonké, B., Zapfack, L., Villarroel, D., Schwarz, M., Yoko Ishida, F., Gilpin, M., Nardoto, G. B., Affum-Baffoe, K., Arroyo, L., Bloomfield, K., Ceca, G., Compaore, H., Davies, K., Diallo, A., Fyllas, N. M., Gignoux, J., Hien, F., Johnson, M., Mougin, E., Hiernaux, P., Killeen, T., Metcalfe, D., Miranda, H. S., Steininger, M., Sykora, K., Bird, M. I., Grace, J., Lewis, S., Phillips, O. L., and Lloyd, J.: Structural, physiognomic and above-ground biomass variation in savanna-forest transition zones on three continents – how different are co-occurring savanna and forest formations?, Biogeosciences, 12, 2927–2951, https://doi.org/10.5194/bg-12-2927-2015, 2015.
Viani, R. A. G., Rodrigues, R. R., Dawson, T. E., and Oliveira, R. S.: Savanna soil fertility limits growth but not survival of tropical forest tree seedlings, Plant Soil, 349, 341–353, https://doi.org/10.1007/s11104-011-0879-7, 2011.
Viani, R. A. G., Rodrigues, R. R., Dawson, T. E., Lambers, H., and Oliveira, R. S.: Soil pH accounts for differences in species distribution and leaf nutrient concentrations of Brazilian woodland savannah and seasonally dry forest species, Perspect. Plant Ecol., 16, 64–74, https://doi.org/10.1016/j.ppees.2014.02.001, 2014.
Villarroel, D., Catari, J. C., Calderon, D., Mendez, R., and Feldpausch, T.: Estructura, composición y diversidad arbórea de dos áreas de Cerrado sensu stricto de la Chiquitanía (Santa Cruz, Bolivia), Ecología en Bolivia, 45, 116–130, 2010.
Vitousek, P. M. and Sanford, R. L.: Nutrient cycling in moist tropical forest, Annu. Rev. Ecol. Syst., 17, 137–167, https://doi.org/10.1146/annurev.es.17.110186.001033, 1986.
Wakeel, A., Farooq, M., Qadir, M., and Schubert, S.: Potassium substitution by sodium in plants, Crit. Rev. Plant Sci., 30, 401–413, https://doi.org/10.1080/07352689.2011.587728, 2011.
Wang, M., Zheng, Q., Shen, Q., and Guo, S.: The critical role of potassium in plant stress response, Int. J. Mol. Sci., 14, 7370–7390, 2013.
Ward, D., Wiegand, K., and Getzin, S.: Walter's two-layer hypothesis revisited: back to the roots!, Oecologia, 172, 617–630, 2013.
Warman, L. and Moles, A. T.: Alternative stable states in Australia's Wet Tropics: a theoretical framework for the field data and a field-case for the theory, Landscape Ecol., 24, 1–13, 2009.
Weiskittel, A. R., Hann, D. W., Kershaw Jr, J. A., and Vanclay, J. K.: Forest Growth and Yield Modeling, John Wiley & Sons,413 pp., 2011.
Werger, M. J. A.: Vegetation Structure in the Southern Kalahari, J. Ecol., 66, 933–941, https://doi.org/10.2307/2259305, 1978.
Wesseling, J., van Wijk, W. R., Fireman, M., van't Woudt, B. D., and Hagan, R. M.: Land drainage in relation to soils and crops, in: Drainage of Agricultural Lands, edited by: Luthin, J. N., Agronomy Monograph, Am. Soc. Agr., 461–578, 1957.
White, D. A. and Hood, C. S.: Vegetation patterns and environmental gradients in tropical dry forests of the northern Yucatan Peninsula, J. Veg. Sci., 15, 151–160, https://doi.org/10.1111/j.1654-1103.2004.tb02250.x, 2004.
Williams, R., Duff, G., Bowman, D., and Cook, G.: Variation in the composition and structure of tropical savannas as a function of rainfall and soil texture along a large-scale climatic gradient in the Northern Territory, Australia, J. Biogeogr., 23, 747–756, 1996.
Witkowski, E. T. F. and O'Connor, T. G.: Topo-edaphic, floristic and physiognomic gradients of woody plants in a semi-arid African savanna woodland, Vegetatio, 124, 9–23, https://doi.org/10.1007/BF00045140, 1996.
Wood, S. N.: Generalized Additive Models: an Introduction with R, Chapman & Hall/CRC, Bota Racon, 392 pp., 2006.
Wood, S. N.: Fast stable restricted maximum likelihood and marginal likelihood estimation of semiparametric generalized linear models, J. Roy. Stat. Soc. B, 73, 3–36, 2011.
Wright, S. J., Yavitt, J. B., Wurzburger, N., Turner, B. L., Tanner, E. V. J., Sayer, E. J., Santiago, L. S., Kaspari, M., Hedin, L. O., Harms, K. E., Garcia, M. N., and Corre, M. D.: Potassium, phosphorus, or nitrogen limit root allocation, tree growth, or litter production in a lowland tropical forest, Ecology, 92, 1616–1625, https://doi.org/10.1890/10-1558.1, 2011.
Xu, G., Fan, X., and Miller, A. J.: Plant nitrogen assimilation and use efficiency, Annu. Rev. Plant Biol., 63, 153–182, 2012.
Yao, H., Gao, Y., Nicol, G. W., Campbell, C. D., Prosser, J. I., Zhang, L., Han, W., and Singh, B. K.: Links between ammonia oxidizer community structure, abundance, and nitrification potential in acidic soils, Appl. Environ. Microb., 77, 4618–4625, 2011.
Young, A.: Tropical Soils and Soil Survey, CUP Archive,468 pp., 1980.
Zerihun, A., Montagu, K., Hoffmann, M., and Bray, S.: Patterns of below- and aboveground biomass in Eucalyptus populnea woodland communities of Northeast Australia along a rainfall gradient, Ecosystems, 9, 501–515, https://doi.org/10.1007/s10021-005-0155-x, 2006.
Zörb, C., Senbayram, M., and Peiter, E.: Potassium in agriculture – status and perspectives, J. Plant Physiol., 171, 656–669, 2014.
Zuur, A., Ieno, E. N., Walker, N., Saveliev, A. A., and Smith, G. M.: Mixed Effects Models and Extensions in Ecology with R, Springer,574 pp., 2009.
Short summary
Across tropical South America, forest soils are typically of a higher cation status than their savanna equivalents with soil exchangeable potassium a key soil nutrient differentiating these two vegetation types. Differences in soil water storage capacity are also important – interacting with both potassium availability and precipitation regimes in a relatively complex manner.
Across tropical South America, forest soils are typically of a higher cation status than their...
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