Articles | Volume 20, issue 7
https://doi.org/10.5194/bg-20-1259-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-1259-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 Apr 2023
Research article |
| 05 Apr 2023
| 05 Apr 2023
Estimating oil-palm Si storage, Si return to soils, and Si losses through harvest in smallholder oil-palm plantations of Sumatra, Indonesia
Britta Greenshields
CORRESPONDING AUTHOR
Department of Physical Geography, University of Göttingen,
Göttingen, Germany
Barbara von der Lühe
Department of Physical Geography, University of Göttingen,
Göttingen, Germany
now at: Faculty of Geoscience, University of Münster, Münster, Germany
Felix Schwarz
Department of Physical Geography, University of Göttingen,
Göttingen, Germany
Harold J. Hughes
Department of Physical Geography, University of Göttingen,
Göttingen, Germany
Aiyen Tjoa
Faculty of Agriculture, Tadulako University, Palu, Indonesia
Martyna Kotowska
Department of Plant Ecology and Ecosystems Research, University of
Göttingen, Göttingen, Germany
Fabian Brambach
Department of Biodiversity, Macroecology and Biogeography, University
of Göttingen, Göttingen, Germany
Daniela Sauer
Department of Physical Geography, University of Göttingen,
Göttingen, Germany
Related authors
Britta Greenshields, Barbara von der Lühe, Harold J. Hughes, Christian Stiegler, Suria Tarigan, Aiyen Tjoa, and Daniela Sauer
SOIL, 9, 169–188, https://doi.org/10.5194/soil-9-169-2023, https://doi.org/10.5194/soil-9-169-2023, 2023
Short summary
Short summary
Silicon (Si) research could provide complementary measures in sustainably cultivating oil-palm monocultures. Our study shows that current oil-palm management practices and topsoil erosion on oil-palm plantations in Indonesia have caused a spatial distribution of essential Si pools in soil. A lack of well-balanced Si levels in topsoil could negatively affect crop yield and soil fertility for future replanting at the same plantation site. Potential measures are suggested to maintain Si cycling.
Guantao Chen, Edzo Veldkamp, Muhammad Damris, Bambang Irawan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences, 21, 513–529, https://doi.org/10.5194/bg-21-513-2024, https://doi.org/10.5194/bg-21-513-2024, 2024
Short summary
Short summary
We established an oil palm management experiment in a large-scale oil palm plantation in Jambi, Indonesia. We recorded oil palm fruit yield and measured soil CO2, N2O, and CH4 fluxes. After 4 years of treatment, compared with conventional fertilization with herbicide weeding, reduced fertilization with mechanical weeding did not reduce yield and soil greenhouse gas emissions, which highlights the legacy effects of over a decade of conventional management prior to the start of the experiment.
Nora Pfaffner, Annette Kadereit, Volker Karius, Thomas Kolb, Sebastian Kreutzer, and Daniela Sauer
E&G Quaternary Sci. J., 73, 1–22, https://doi.org/10.5194/egqsj-73-1-2024, https://doi.org/10.5194/egqsj-73-1-2024, 2024
Short summary
Short summary
We present results of the Baix loess–palaeosol sequence, SE France. Reconstructed intense soil formation under warm, moist conditions before and into the last ice age and less intense soil formations in warm (temporarily moist) phases during the generally cold, dry ice age were validated with laboratory and dating techniques. This is particularly relevant as Baix is located in the temperate–Mediterranean climate transition zone, a sensitive zone that is susceptible to future climate changes.
Britta Greenshields, Barbara von der Lühe, Harold J. Hughes, Christian Stiegler, Suria Tarigan, Aiyen Tjoa, and Daniela Sauer
SOIL, 9, 169–188, https://doi.org/10.5194/soil-9-169-2023, https://doi.org/10.5194/soil-9-169-2023, 2023
Short summary
Short summary
Silicon (Si) research could provide complementary measures in sustainably cultivating oil-palm monocultures. Our study shows that current oil-palm management practices and topsoil erosion on oil-palm plantations in Indonesia have caused a spatial distribution of essential Si pools in soil. A lack of well-balanced Si levels in topsoil could negatively affect crop yield and soil fertility for future replanting at the same plantation site. Potential measures are suggested to maintain Si cycling.
Florian Schneider, Michael Klinge, Jannik Brodthuhn, Tino Peplau, and Daniela Sauer
SOIL, 7, 563–584, https://doi.org/10.5194/soil-7-563-2021, https://doi.org/10.5194/soil-7-563-2021, 2021
Short summary
Short summary
The central Mongolian forest steppe underlies a recent decline of forested area. We analysed the site and soil properties in the Khangai Mountains to identify differences between disturbed forest areas with and without regrowth of trees. More silty soils were found under areas with tree regrowth and more sandy soils under areas without tree regrowth. Due to the continental, semi-arid climate, soil properties which increase the amount of available water are decisive for tree regrowth in Mongolia.
Christopher Lüthgens, Daniela Sauer, and Michael Zech
E&G Quaternary Sci. J., 69, 261–262, https://doi.org/10.5194/egqsj-69-261-2021, https://doi.org/10.5194/egqsj-69-261-2021, 2021
Greta Formaglio, Edzo Veldkamp, Xiaohong Duan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences, 17, 5243–5262, https://doi.org/10.5194/bg-17-5243-2020, https://doi.org/10.5194/bg-17-5243-2020, 2020
Short summary
Short summary
The intensive management of large-scale oil palm plantations may result in high nutrient leaching losses which reduce soil fertility and potentially pollute water bodies. The reduction in management intensity with lower fertilization rates and with mechanical weeding instead of the use of herbicide results in lower nutrient leaching losses while maintaining high yield. Lower leaching results from lower nutrient inputs from fertilizer and from higher retention by enhanced cover vegetation.
Michael Klinge, Choimaa Dulamsuren, Florian Schneider, Stefan Erasmi, Markus Hauck, Uudus Bayarsaikhan, and Daniela Sauer
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-13, https://doi.org/10.5194/bg-2020-13, 2020
Manuscript not accepted for further review
Short summary
Short summary
The Mongolian forest-steppe suffers from fire and woodcutting. The forest distribution was analysed by tree biomass, remote sensing and climate data. Tree biomass was reduced at forest edges and in small forest, and high in alluvial forests. The actual tree biomass represented 57 % of that in 1986, prior to extensive fires. Relationships between forests and topographic and climatic parameters enable modelling of potential forest, which is about three times the actual forest area.
Christopher Lüthgens, Daniela Sauer, Michael Zech, Becky Briant, Eleanor Brown, Elisabeth Dietze, Markus Fuchs, Nicole Klasen, Sven Lukas, Jan-Hendrik May, Julia Meister, Tony Reimann, Gilles Rixhon, Zsófia Ruszkiczay-Rüdiger, Bernhard Salcher, Tobias Sprafke, Ingmar Unkel, Hans von Suchodoletz, and Christian Zeeden
E&G Quaternary Sci. J., 68, 243–244, https://doi.org/10.5194/egqsj-68-243-2020, https://doi.org/10.5194/egqsj-68-243-2020, 2020
Ashehad A. Ali, Yuanchao Fan, Marife D. Corre, Martyna M. Kotowska, Evelyn Hassler, Fernando E. Moyano, Christian Stiegler, Alexander Röll, Ana Meijide, Andre Ringeler, Christoph Leuschner, Tania June, Suria Tarigan, Holger Kreft, Dirk Hölscher, Chonggang Xu, Charles D. Koven, Rosie Fisher, Edzo Veldkamp, and Alexander Knohl
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2018-236, https://doi.org/10.5194/gmd-2018-236, 2018
Revised manuscript not accepted
Short summary
Short summary
We used carbon-use and water-use related datasets of small-holder rubber plantations from Jambi province, Indonesia to develop and calibrate a rubber plant functional type for the Community Land Model (CLM-rubber). Increased sensitivity of stomata to soil water stress and enhanced respiration costs enabled the model to capture the magnitude of transpiration and leaf area index. Including temporal variations in leaf life span enabled the model to better capture the seasonality of leaf litterfall.
Johanna Lomax, Raphael Steup, Lyudmila Shumilovskikh, Christian Hoselmann, Daniela Sauer, Veit van Diedenhoven, and Markus Fuchs
DEUQUA Spec. Pub., 1, 15–28, https://doi.org/10.5194/deuquasp-1-15-2018, https://doi.org/10.5194/deuquasp-1-15-2018, 2018
Rodolfo Luiz Bezerra Nóbrega, Gabriele Lamparter, Harold Hughes, Alphonce Chenjerayi Guzha, Ricardo Santos Silva Amorim, and Gerhard Gerold
Proc. IAHS, 377, 3–7, https://doi.org/10.5194/piahs-377-3-2018, https://doi.org/10.5194/piahs-377-3-2018, 2018
Short summary
Short summary
We analyzed the impacts of deforestation on water quantity and quality in the Tapajós River, one of the main tributaries of the Amazon River. To that end, we used data from 2 years of fieldwork as well other state-of-the-art techniques in small and large areas of this study area. We found changes in water quality and quantity across small and large portions of this area. Our results show that some impacts of deforestation usually observed in small streams are also affecting the major river.
Y. Fan, O. Roupsard, M. Bernoux, G. Le Maire, O. Panferov, M. M. Kotowska, and A. Knohl
Geosci. Model Dev., 8, 3785–3800, https://doi.org/10.5194/gmd-8-3785-2015, https://doi.org/10.5194/gmd-8-3785-2015, 2015
Short summary
Short summary
A perennial crop model CLM-Palm is developed, including multilayer structure, phenology, and carbon and nitrogen allocation functions, for modeling an important oil palm agricultural system in the tropical regions. Simulated LAI, yield and NPP were calibrated and validated with multiple sites in Sumatra, Indonesia. The new model allows exploring the effects of tropical land use change, from natural ecosystems to monoculture plantations on carbon, water and energy cycles and regional climate.
E. Hassler, M. D. Corre, A. Tjoa, M. Damris, S. R. Utami, and E. Veldkamp
Biogeosciences, 12, 5831–5852, https://doi.org/10.5194/bg-12-5831-2015, https://doi.org/10.5194/bg-12-5831-2015, 2015
Short summary
Short summary
We found that in Indonesia, oil palm displayed reduced soil CO2 fluxes compared to forest and rubber plantations; this was mainly caused by reduced litter input. Furthermore, we measured reduced soil CH4 uptake in oil palm and rubber plantations compared to forest; this was due to a decrease in soil N availability in the converted land uses. Our study shows for the first time that differences in soil fertility control soil-atmosphere exchange of CO2 and CH4 in a tropical landscape.
Related subject area
Biogeochemistry: Land
Monitoring the impact of forest changes on carbon uptake with solar-induced fluorescence measurements from GOME-2A and TROPOMI for an Australian and Chinese case study
Technical note: Flagging inconsistencies in flux tower data
Relevance of near-surface soil moisture vs. terrestrial water storage for global vegetation functioning
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra
Long-term additions of ammonium nitrate to montane forest ecosystems may cause limited soil acidification, even in the presence of soil carbonate
Leaf carbon and nitrogen stoichiometric variation along environmental gradients
Soil carbon-concentration and carbon-climate feedbacks in CMIP6 Earth system models
Gross primary productivity and the predictability of CO2: more uncertainty in what we predict than how well we predict it
Scale variance in the carbon dynamics of fragmented, mixed-use landscapes estimated using model–data fusion
Seasonal controls override forest harvesting effects on the composition of dissolved organic matter mobilized from boreal forest soil organic horizons
Carbon cycle extremes accelerate weakening of the land carbon sink in the late 21st century
Assessing the sensitivity of multi-frequency passive microwave vegetation optical depth to vegetation properties
Seasonal variation of mercury concentration of ancient olive groves of Lebanon
Soil organic matter diagenetic state informs boreal forest ecosystem feedbacks to climate change
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
Juliëtte C. S. Anema, Klaas Folkert Boersma, Piet Stammes, Gerbrand Koren, William Woodgate, Philipp Köhler, Christian Frankenberg, and Jacqui Stol
Biogeosciences, 21, 2297–2311, https://doi.org/10.5194/bg-21-2297-2024, https://doi.org/10.5194/bg-21-2297-2024, 2024
Short summary
Short summary
To keep the Paris agreement goals within reach, negative emissions are necessary. They can be achieved with mitigation techniques, such as reforestation, which 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 due to reforestation and vegetation regrowth.
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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.
Rebecca M. Varney, Pierre Friedlingstein, Sarah E. Chadburn, Eleanor J. Burke, and Peter M. Cox
EGUsphere, https://doi.org/10.5194/egusphere-2023-2666, https://doi.org/10.5194/egusphere-2023-2666, 2023
Short summary
Short summary
Soil carbon is the largest store of carbon on the land surface of Earth and is known to be particularly sensitive to climate change. Understanding this future response is vital to successfully meet Paris agreement targets, which rely heavily on carbon uptake by the land surface. In this study, the individual responses of soil carbon are quantified and compared amongst CMIP6 Earth system models used within the most recent IPCC report, and the role of soils within the land response is highlighted.
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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.
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Aholoukpè, H. N. S., Dubos, B., Deleporte, P., Flori, A., Amadji, L. G.,
Chotte, J. L., and Blavet, D.: Allometric equations for estimating oil palm
stem biomass in the ecological context of Benin, West Africa, Trees, 32,
1669–1680, https://doi.org/10.1007/s00468-018-1742-8, 2018.
Albakri, Z. M., Saufi, M., Kassim, M., Abdullah, A. F., and Harith, H. H.:
SCIENCE and TECHNOLOGY Analysis of Oil Palm Leaf Phyllotaxis towards
Development of Models to Determine the Fresh Fruit Bunch (FFB) Maturity
Stages, Yield and Site-Specific Harvesting, Pertanika J. Sci. Technol.,
27, 659–672, 2019.
Alexandre, A., Meunier, J.-D., Colin, F., and Koud, J.-M.: Plant impact on
the biogeochemical cycle of silicon and related weathering processes,
Geochim. Cosmochim. Ac., 61, 677–682,
https://doi.org/10.1016/S0016-7037(97)00001-X, 1997.
Allen, K., Corre, M. D., Kurniawan, S., Utami, S. R., and Veldkamp, E.:
Spatial variability surpasses land-use change effects on soil biochemical
properties of converted lowland landscapes in Sumatra, Indonesia, Geoderma,
284, 42–50, https://doi.org/10.1016/j.geoderma.2016.08.010, 2016.
Amirruddin, A. D., Muharam, F. M., and Mazlan, N.: Assessing leaf scale
measurement for nitrogen content of oil palm: Performance of discriminant
analysis and support vector machine classifiers, Int. J. Remote Sens., 38,
7260–7280, https://doi.org/10.1080/01431161.2017.1372862, 2017.
Awalludin, M. F., Sulaiman, O., Hashim, R., and Nadhari, W. N. A. W.: An
overview of the oil palm industry in Malaysia and its waste utilization
through thermochemical conversion, specifically via liquefaction, Renew. Sustain. Energ. Rev., 50, 1469–1484,
https://doi.org/10.1016/j.rser.2015.05.085, 2015.
Carey, J.: Soil age alters the global silicon cycle, Science, 369,
1161–1162, https://doi.org/10.1126/science.abd9425, 2020.
Carey, J. C. and Fulweiler, R. W.: The Terrestrial Silica Pump, PLoS One, 7,
e52932, https://doi.org/10.1371/journal.pone.0052932, 2012.
Carey, J. C. and Fulweiler, R. W.: Human appropriation of biogenic silicon
– the increasing role of agriculture, Funct. Ecol., 30, 1331–1339,
https://doi.org/10.1111/1365-2435.12544, 2016.
Chang, S. H.: An overview of empty fruit bunch from oil palm as feedstock
for bio-oil production, Biomass Bioenerg., 62, 174–181,
https://doi.org/10.1016/j.biombioe.2014.01.002, 2014.
Clough, Y., Krishna, V. v., Corre, M. D., Darras, K., Denmead, L. H.,
Meijide, A., Moser, S., Musshoff, O., Steinebach, S., Veldkamp, E., Allen,
K., Barnes, A. D., Breidenbach, N., Brose, U., Buchori, D., Daniel, R.,
Finkeldey, R., Harahap, I., Hertel, D., Holtkamp, A. M., Hörandl, E.,
Irawan, B., Jaya, I. N. S., Jochum, M., Klarner, B., Knohl, A., Kotowska, M.
M., Krashevska, V., Kreft, H., Kurniawan, S., Leuschner, C., Maraun, M.,
Melati, D. N., Opfermann, N., Pérez-Cruzado, C., Prabowo, W. E.,
Rembold, K., Rizali, A., Rubiana, R., Schneider, D., Tjitrosoedirdjo, S. S.,
Tjoa, A., Tscharntke, T., and Scheu, S.: Land-use choices follow
profitability at the expense of ecological functions in Indonesian
smallholder landscapes, Nat. Commun., 7, 1–12,
https://doi.org/10.1038/ncomms13137, 2016.
Clymans, W., Struyf, E., Govers, G., Vandevenne, F., and Conley, D. J.:
Anthropogenic impact on amorphous silica pools in temperate soils,
Biogeosciences, 8, 2281–2293, https://doi.org/10.5194/bg-8-2281-2011, 2011.
Clymans, W., Struyf, E., Van den Putte, A., Langhans, C., Wang, Z., and
Govers, G.: Amorphous silica mobilization by inter-rill erosion: Insights
from rainfall experiments, Earth Surf. Process. Landf., 40, 1171–1181,
https://doi.org/10.1002/esp.3707, 2015.
Conley, D. J., Likens, G. E., Buso, D. C., Saccone, L., Bailey, S. W., and
Johnson, C. E.: Deforestation causes increased dissolved silicate losses in
the Hubbard Brook Experimental Forest, Glob. Change Biol., 14, 2548–2554,
https://doi.org/10.1111/j.1365-2486.2008.01667.x, 2008.
Corley, R. H. V. and Tinker, P. B.: The Oil Palm, 5th Edn., Wiley, 687 pp.,
https://doi.org/10.1017/cbo9781316530122.010, 2016.
Corley, R. H. V., Hardon, J. J., and Tan, G. Y.: Analysis of growth of the
oil palm (Elaeis guineensis Jacq.), I. Estimation of growth parameters and
application in breeding, Euphytica, 20, 307–315,
https://doi.org/10.1007/BF00056093, 1971.
De Coster, G. L.: The Geology of the central and south sumatra basins, 77–110, 1974.
Darras, K. F. A., Corre, M. D., Formaglio, G., Tjoa, A., Potapov, A.,
Brambach, F., Sibhatu, K. T., Grass, I., Rubiano, A. A., Buchori, D.,
Drescher, J., Fardiansah, R., Hölscher, D., Irawan, B., Kneib, T.,
Krashevska, V., Krause, A., Kreft, H., Li, K., Maraun, M., Polle, A.,
Ryadin, A. R., Rembold, K., Stiegler, C., Scheu, S., Tarigan, S.,
Valdés-Uribe, A., Yadi, S., Tscharntke, T., and Veldkamp, E.: Reducing
Fertilizer and Avoiding Herbicides in Oil Palm Plantations – Ecological and
Economic Valuations, Front. Forest. Glob. Change, 2, 1–15,
https://doi.org/10.3389/ffgc.2019.00065, 2019.
Datnoff, L. E., Deren, C. W., and Snyder, G. H.: Silicon fertilization for
disease management of rice in Florida, Crop Prot., 16, 525–531,
https://doi.org/10.1016/S0261-2194(97)00033-1, 1997.
de Tombeur, F., Turner, B. L., Laliberté, E., Lambers, H., Mahy, G.,
Faucon, M. P., Zemunik, G., and Cornelis, J. T.: Plants sustain the
terrestrial silicon cycle during ecosystem retrogression, Science,
369, 1245–1248, https://doi.org/10.1126/science.abc0393, 2020.
Dislich, C., Keyel, A. C., Salecker, J., Kisel, Y., Meyer, K. M., Auliya,
M., Barnes, A. D., Corre, M. D., Darras, K., Faust, H., Hess, B., Klasen,
S., Knohl, A., Kreft, H., Meijide, A., Nurdiansyah, F., Otten, F., Pe'er,
G., Steinebach, S., Tarigan, S., Tölle, M. H., Tscharntke, T., and
Wiegand, K.: A review of the ecosystem functions in oil palm plantations,
using forests as a reference system, Biol. Rev., 92, 1539–1569,
https://doi.org/10.1111/brv.12295, 2017.
Drescher, J., Rembold, K., Allen, K., Beckscha, P., Buchori, D., Clough, Y.,
Faust, H., Fauzi, A. M., Gunawan, D., Hertel, D., Irawan, B., Jaya, I. N.
S., Klarner, B., Kleinn, C., Knohl, A., Kotowska, M. M., Krashevska, V.,
Krishna, V., Leuschner, C., Lorenz, W., Meijide, A., Melati, D., Steinebach,
S., Tjoa, A., Tscharntke, T., Wick, B., Wiegand, K., Kreft, H., and Scheu,
S.: Ecological and socio-economic functions across tropical land use systems
after rainforest conversion, Philos. T. R. Soc.
B, 371, 20150275,
https://doi.org/10.1098/rstb.2015.0275, 2016.
Dungani, R., Jawaid, M., Khalil, H. P. S. A., Jasni, Aprilia, S., Hakeem, K.
R., Hartati, S., and Islam, M. N.: A review on quality enhancement of oil
palm trunk waste by resin impregnation: Future materials, Bioresources, 8,
3136–3156, https://doi.org/10.15376/biores.8.2.3136-3156, 2013.
Epstein, E.: The anomaly of silicon in plant biology, P.
Natl. Acad. Sci. USA, 91, 11–17,
https://doi.org/10.1073/pnas.91.1.11, 1994.
Epstein, E.: Silicon: its manifold roles in plants, Ann. Appl.
Biol., 155, 155–160, https://doi.org/10.1111/j.1744-7348.2009.00343.x,
2009.
Euler, M., Hoffmann, M. P., Fathoni, Z., and Schwarze, S.: Exploring yield
gaps in smallholder oil palm production systems in eastern Sumatra,
Indonesia, Agr. Sci. China, 146, 111–119,
https://doi.org/10.1016/j.agsy.2016.04.007, 2016a.
Euler, M., Schwarze, S., Siregar, H., and Qaim, M.: Oil Palm Expansion among
Smallholder Farmers in Sumatra, Indonesia, J. Agr. Econ., 67, 658–676,
https://doi.org/10.1111/1477-9552.12163, 2016b.
FAO: Oilseeds, Oils & Meals, Monthly Price and Policy Update No. 132, July 2020 (MPPU – issue no. 132, July 2020), 2020.
Fox, J. and Weisberg, S.: An { R} Companion to
Applied Regression, 3rd Edn., Thousand Oaks, CA, Sage,
https://socialsciences. mcmaster.ca/jfox/Books/Companion/ (last access: 8 February 2023), 2019.
Gaveau, D. L. A., Locatelli, B., Salim, M. A., Husnayaen, Manurung, T.,
Descals, A., Angelsen, A., Meijaard, E., and Sheil, D.: Slowing
deforestation in Indonesia follows declining oil palm expansion and lower
oil prices, PLoS One, 17, e0266178,
https://doi.org/10.1371/journal.pone.0266178, 2022.
Grass, I., Kubitza, C., Krishna, V. v., Corre, M. D., Mußhoff, O.,
Pütz, P., Drescher, J., Rembold, K., Ariyanti, E. S., Barnes, A. D.,
Brinkmann, N., Brose, U., Brümmer, B., Buchori, D., Daniel, R., Darras,
K. F. A., Faust, H., Fehrmann, L., Hein, J., Hennings, N., Hidayat, P.,
Hölscher, D., Jochum, M., Knohl, A., Kotowska, M. M., Krashevska, V.,
Kreft, H., Leuschner, C., Lobite, N. J. S., Panjaitan, R., Polle, A.,
Potapov, A. M., Purnama, E., Qaim, M., Röll, A., Scheu, S., Schneider,
D., Tjoa, A., Tscharntke, T., Veldkamp, E., and Wollni, M.: Trade-offs
between multifunctionality and profit in tropical smallholder landscapes,
Nat. Commun., 11, 1–13, https://doi.org/10.1038/s41467-020-15013-5, 2020.
Grasshoff, K., Kremling, K., and Ehrhardt, M.: Methods of sea water
analysis, 3rd Edn., John Wiley & Sons, 899 pp.,
https://doi.org/10.1016/0304-4203(78)90045-2, 2009.
Greenshields, B., von der Lühe, B., Hughes, H. J., Stiegler, C., Tarigan, S., Tjoa, A., and Sauer, D.: Oil-palm management alters the spatial distribution of amorphous silica and mobile silicon in topsoils, SOIL, 9, 169–188, https://doi.org/10.5194/soil-9-169-2023, 2023.
Guntzer, F., Keller, C., Poulton, P. R., McGrath, S. P., and Meunier, J. D.:
Long-term removal of wheat straw decreases soil amorphous silica at
Broadbalk, Rothamsted, Plant Soil, 352, 173–184,
https://doi.org/10.1007/s11104-011-0987-4, 2012.
Haynes, R. J.: A contemporary overview of silicon availability in
agricultural soils, J. Plant Nutr. Soil Sci., 177,
831–844, https://doi.org/10.1002/jpln.201400202, 2014.
Haynes, R. J.: The nature of biogenic Si and its potential role in Si supply
in agricultural soils, Agr. Ecosyst. Environ., 245, 100–111,
https://doi.org/10.1016/j.agee.2017.04.021, 2017.
Heinrichs, H. and Hermann, A. G.: Praktikum der Analytischen Geochemie, in:
Lehrbuch, Springer Berlin, Heidelberg, https://doi.org/10.1007/978-3-642-61286-2, 1990.
Heinrichs, H., Brumsack, H. J., Loftfield, N., and König, N.:
Verbessertes Druckaufschlußsystem für biologische und anorganische
Materialien, Z. Pflanz. Bodenkunde, 149,
350–353, 1986.
Hennings, N., Becker, J. N., Guillaume, T., Damris, M., Dippold, M. A., and
Kuzyakov, Y.: Riparian wetland properties counter the effect of land-use
change on soil carbon stocks after rainforest conversion to plantations,
Catena, 196, 104941, https://doi.org/10.1016/j.catena.2020.104941,
2021.
Hughes, H. J., Hung, D. T., and Sauer, D.: Silicon recycling through rice
residue management does not prevent silicon depletion in paddy rice
cultivation, Nutr. Cycl. Agroecosyst., 118, 75–89,
https://doi.org/10.1007/s10705-020-10084-8, 2020.
IUSS Working Group WRB: World Reference Base or Soil Resources 2014, update
2015 International soil classification system for naming soils and creating
legends for soil maps, FAO, Rome, 4th Edn., International
Union of Soil Sciences (IUSS), Vienna, Austria, 1–191,
https://doi.org/10.1017/S0014479706394902, 2022.
Klotzbücher, T., Klotzbücher, A., Kaiser, K., Merbach, I., and
Mikutta, R.: Impact of agricultural practices on plant-available silicon,
Geoderma, 331, 15–17, https://doi.org/10.1016/j.geoderma.2018.06.011, 2018.
Kotowska, M. M., Leuschner, C., Triadiati, T., Meriem, S., and Hertel, D.:
Quantifying above- and belowground biomass carbon loss with forest
conversion in tropical lowlands of Sumatra (Indonesia), Glob. Change Biol., 21,
3620–3634, https://doi.org/10.1111/gcb.12979, 2015.
Laumonier, Y.: The Vegetation and Physiography of Sumatra, in: Geobotany,
Vol. 22, Kluwer Academic Publishers, 223,
https://doi.org/10.1007/978-94-009-0031-8, 1997.
Lewis, K., Rumpang, E., Kho, L. K., McCalmont, J., Teh, Y. A., Gallego-Sala,
A., and Hill, T. C.: An assessment of oil palm plantation aboveground
biomass stocks on tropical peat using destructive and non-destructive
methods, Sci. Rep., 10, 1–12, https://doi.org/10.1038/s41598-020-58982-9,
2020.
Li, Z. and Delvaux, B.: Phytolith-rich biochar: A potential Si fertilizer in
desilicated soils, GCB Bioenergy, 11, 1264–1282,
https://doi.org/10.1111/gcbb.12635, 2019.
Li, Z., de Tombeur, F., Vander Linden, C., Cornelis, J. T., and Delvaux, B.: Soil microaggregates store phytoliths in a sandy loam, Geoderma, 360,
114037, https://doi.org/10.1016/j.geoderma.2019.114037, 2020.
Liang, Y., Nikolic, M., Bélanger, R., Gong, H., and Song, A.: Silicon in
Agriculture, Springer, Dordrecht, 235 pp.,
https://doi.org/10.1007/978-94-017-9978-2, 2015.
Lucas, Y., Luizão, F. J., Chauvel, A., Rouiller, J., and Nahon, D.: The
relation between biological activity of the rain forest and mineral
composition of soils, Science, 260, 521–523, 1993.
Luke, S. H., Purnomo, D., Advento, A. D., Aryawan, A. A. K., Naim, M.,
Pikstein, R. N., Ps, S., Rambe, T. D. S., Soeprapto, Caliman, J.-P.,
Snaddon, J. L., Foster, W. A., and Turner, E. C.: Effects of understory
vegetation management on plant communities in oil palm plantations in
Sumatra, Indonesia, Front. Forest. Glob. Change, 2, 1–13,
https://doi.org/10.3389/ffgc.2019.00033, 2019.
Ma, J. F. and Takahashi, E.: Silicon-accumulating plants in the plant
kingdom, in: Soil, fertilizer, and plant silicon research in Japan, Elsevier
Science, Amsterdam, Elsevier, 63–71,
https://doi.org/10.1016/b978-044451166-9/50005-1, 2002.
Meijaard, E., Brooks, T., Carlson, K. M., Slade, E. M., and Ulloa, J. G.:
The environmental impacts of palm oil in context, Nat. Plants, 6, 1418–1426,
https://doi.org/10.1038/s41477-020-00813-w, 2020.
Munevar, F. and Romero, A.: Soil and plant silicon status in oil palm crops
in Colombia, Exp. Agric., 51, 1–11,
https://doi.org/10.1017/S0014479714000374, 2015.
Ollivier, J., Flori, A., Cochard, B., Amblard, P., Turnbull, N., Syahputra,
I., Suryana, E., Lubis, Z., Surya, E., Sihombing, E., and Gasselin, D. T.:
Genetic variation in nutrient uptake and nutrient use efficiency of oil
palm, J. Plant. Nutr., 40, 558–573,
https://doi.org/10.1080/01904167.2016.1262415, 2017.
Omar, F. N., Mohammed, M. A. P., and Baharuddin, A. S.: Effect of silica
bodies on the mechanical behaviour of oil palm empty fruit bunch fibres,
Bioresources, 9, 7041–7058, https://doi.org/10.15376/biores.9.4.7041-7058,
2014.
Onoja, E., Chandren, S., Abdul Razak, F. I., Mahat, N. A., and Wahab, R. A.:
Oil Palm (Elaeis guineensis) Biomass in Malaysia: The Present and Future
Prospects, Waste Biomass Valori., 10, 2099–2117,
https://doi.org/10.1007/s12649-018-0258-1, 2019.
Pratiwi, W., Sugiharto, A., and Sugesty, S.: The effect of pulping process
variable and elemental chlorine free bleaching on the quality of oil palm
trunk pulp, Jurnal Selulosa, 8, 85–94, https://doi.org/10.25269/jsel.v8i02.218,
2018.
Puppe, D., Kaczorek, D., Schaller, J., Barkusky, D., and Sommer, M.: Crop
straw recycling prevents anthropogenic desilication of agricultural
soil–plant systems in the temperate zone – Results from a long-term field
experiment in NE Germany, Geoderma, 403, 1–13,
https://doi.org/10.1016/j.geoderma.2021.115187, 2021.
Qaim, M., Sibhatu, K. T., Siregar, H., and Grass, I.: Environmental,
Economic, and Social Consequences of the Oil Palm Boom, Annu. Rev. Resour.
Econ., 12, 1–24,
https://doi.org/10.1146/annurev-resource-110119-024922, 2020.
Rees, A. R.: The apical organization and phyllotaxis of the oil palm, Ann.
Bot., 28, 57–69, https://doi.org/10.1093/oxfordjournals.aob.a083895, 1964.,
Revelle, W.: psych: Procedures for Personality and Psychological Research, Northwestern University,
Evanston, Illinois, USA,
2022.
Rubinsin, N., Daud, W. R. W., Kamarudin, S. K., Masdar, M. S., Rosli, M. I.,
Samsatli, S., Tapia, J. F., Wan Ab Karim Ghani, W. A., and Lim, K. L.:
Optimization of oil palm empty fruit bunches value chain in peninsular
malaysia, Food Bioprod. Process., 119, 179–194,
https://doi.org/10.1016/j.fbp.2019.11.006, 2020.
Saccone, L., Conley, D. J., Koning, E., Sauer, D., Sommer, M., Kaczorek, D.,
Blecker, S. W., and Kelly, E. F.: Assessing the extraction and
quantification of amorphous silica in soils of forest and grassland
ecosystems, Eur. J. Soil Sci., 58, 1446–1459,
https://doi.org/10.1111/j.1365-2389.2007.00949.x, 2007.
Santi, L. P., Kalbuadi, D. N., and Goenadi, D. H.: Empty fruit bunches as
potential source for biosilica fertilizer for oil palm, J. Trop. Biodivers.
Biotechnol., 4, 90–96, https://doi.org/10.22146/jtbb.38749, 2019.
Schaller, J., Turner, B. L., Weissflog, A., Pino, D., Bielnicka, A. W., and
Engelbrecht, B. M. J.: Silicon in tropical forests: large variation across
soils and leaves suggests ecological significance, Biogeochemistry, 140,
161–174, https://doi.org/10.1007/s10533-018-0483-5, 2018.
Selamat, M. E., Hashim, R., Sulaiman, O., Kassim, M. H. M., Saharudin, N.
I., and Taiwo, O. F. A.: Comparative study of oil palm trunk and rice husk
as fillers in gypsum composite for building material, Constr. Build. Mater.,
197, 526–532, https://doi.org/10.1016/j.conbuildmat.2018.11.003, 2019.
Struyf, E., Smis, A., Van Damme, S., Garnier, J., Govers, G., Van Wesemael,
B., Conley, D. J., Batelaan, O., Frot, E., Clymans, W., Vandevenne, F.,
Lancelot, C., Goos, P., and Meire, P.: Historical land use change has
lowered terrestrial silica mobilization, Nat. Commun., 1, 127–129,
https://doi.org/10.1038/ncomms1128, 2010.
Tarigan, S., Stiegler, C., Wiegand, K., Knohl, A., and Murtilaksono, K.:
Relative contribution of evapotranspiration and soil compaction to the
fluctuation of catchment discharge: case study from a plantation landscape,
Hydrol. Sci. J., 65, 1239–1248,
https://doi.org/10.1080/02626667.2020.1739287, 2020.
Tsujino, R., Yumoto, T., Kitamura, S., Djamaluddin, I., and Darnaedi, D.:
History of forest loss and degradation in Indonesia, Land Use Policy, 57,
335–347, https://doi.org/10.1016/j.landusepol.2016.05.034, 2016.
vander Linden, C. and Delvaux, B.: The weathering stage of tropical soils
affects the soil-plant cycle of silicon, but depending on land use,
Geoderma, 351, 209–220, https://doi.org/10.1016/j.geoderma.2019.05.033,
2019.
Vandevenne, F., Struyf, E., Clymans, W., and Meire, P.: Agricultural silica
harvest: have humans created a new loop in the global silica cycle?, Front.
Ecol. Environ., 10, 243–248, https://doi.org/10.1890/110046, 2012.
von der Lühe, B., Pauli, L., Greenshields, B., Hughes, H. J., Tjoa, A.,
and Sauer, D.: Transformation of Lowland Rainforest into Oil-palm
Plantations and use of Fire alter Topsoil and Litter Silicon Pools and
Fluxes, Silicon, 13, 4345–4353, https://doi.org/10.1007/s12633-020-00680-2,
2020.
von der Lühe, B., Bezler, K., Hughes, H. J., Greenshields, B., Tjoa, A.,
and Sauer, D.: Oil-palm and Rainforest Phytoliths Dissolve at Different
Rates – with Implications for Silicon Cycling After Transformation of
Rainforest Into Oil-palm Plantation, Silicon, 1347–1354,
https://doi.org/10.1007/s12633-022-02066-y, 2022.
Wickham, H.: ggplot2: Elegant Graphics for Data Analysis, Springer-Verlag New York, 2016.
Woittiez, L. S., van Wijk, M. T., Slingerland, M., van Noordwijk, M., and
Giller, K. E.: Yield gaps in oil palm: A quantitative review of contributing
factors, Europ. J. Agron., 83, 57–77,
https://doi.org/10.1016/j.eja.2016.11.002, 2017.
Woittiez, L. S., Slingerland, M., Rafik, R., and Giller, K. E.: Nutritional
imbalance in smallholder oil palm plantations in Indonesia, Nutr. Cycl.
Agroecosyst., 111, 73–86, https://doi.org/10.1007/s10705-018-9919-5, 2018.
Zellner, W., Tubaña, B., Rodrigues, F. A., and Datnoff, L. E.: Silicon's
Role in Plant Stress Reduction and Why This Element Is Not Used Routinely
for Managing Plant Health, Plant Dis., 105, 2033–2049,
https://doi.org/10.1094/PDIS-08-20-1797-FE, 2021.
Short summary
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.
Silicon (Si) can have multiple beneficial effects on crops such as oil palms. In this study, we...
Altmetrics
Final-revised paper
Preprint