Articles | Volume 15, issue 7
https://doi.org/10.5194/bg-15-2149-2018
© Author(s) 2018. 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-15-2149-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Apr 2018
Research article |
| 10 Apr 2018
| 10 Apr 2018
Wet season cyanobacterial N enrichment highly correlated with species richness and Nostoc in the northern Australian savannah
Wendy Williams
CORRESPONDING AUTHOR
School of Agriculture and Food Sciences, The University of
Queensland, Gatton 4343, Australia
Burkhard Büdel
Dept. of Biology, University of
Kaiserslautern, Kaiserslautern, Germany
Stephen Williams
School of Agriculture and Food Sciences, The University of
Queensland, Gatton 4343, Australia
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Wendy Williams, Angela Chilton, Mel Schneemilch, Stephen Williams, Brett Neilan, and Colin Driscoll
Biogeosciences, 16, 2189–2204, https://doi.org/10.5194/bg-16-2189-2019, https://doi.org/10.5194/bg-16-2189-2019, 2019
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Rare earth mining processes require the removal of topsoil that is mechanically scraped off and relocated to topsoil stockpiles, which proved beneficial for microbial biobanking. But there appears to be a critical time frame for holding topsoil, and rainfall penetration into the stockpile may result in the demise of cyanobacteria. In the longer term, provided conditions are favourable, there may be adequate cyanobacterial survival, at least down to 50 cm, to recolonise the soil surfaces.
Burkhard Büdel, Wendy J. Williams, and Hans Reichenberger
Biogeosciences, 15, 491–505, https://doi.org/10.5194/bg-15-491-2018, https://doi.org/10.5194/bg-15-491-2018, 2018
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We report on the net primary productivity of a biological soil crust from the Boodjamulla NP, Queensland. Metabolic activity lasted from September 2010 to mid-April 2011, referring to 23.6 % of the total time of the year. The first months of activity had a respiratory loss of CO2. Of the metabolic active period, 48.6 % were photosynthesis and 51.4 % dark respiration. Carbon gain was 1.72 g m−2 yr−1. The gas exchange pattern was divided into metabolically inactive winter and active summer month.
Wendy Williams, Angela Chilton, Mel Schneemilch, Stephen Williams, Brett Neilan, and Colin Driscoll
Biogeosciences, 16, 2189–2204, https://doi.org/10.5194/bg-16-2189-2019, https://doi.org/10.5194/bg-16-2189-2019, 2019
Short summary
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Rare earth mining processes require the removal of topsoil that is mechanically scraped off and relocated to topsoil stockpiles, which proved beneficial for microbial biobanking. But there appears to be a critical time frame for holding topsoil, and rainfall penetration into the stockpile may result in the demise of cyanobacteria. In the longer term, provided conditions are favourable, there may be adequate cyanobacterial survival, at least down to 50 cm, to recolonise the soil surfaces.
Michelle Szyja, Burkhard Büdel, and Claudia Colesie
Biogeosciences, 15, 1919–1931, https://doi.org/10.5194/bg-15-1919-2018, https://doi.org/10.5194/bg-15-1919-2018, 2018
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Ongoing human impact transforms habitats into surfaces lacking higher vegetation. Here, biological soil crusts (BSCs) provide ecosystem services like soil creation and carbon uptake. To understand the functioning of these areas, we examined the physiological capability of early successional BSCs. We found features enabling BSCs to cope with varying climatic stresses. BSCs are important carbon fixers independent of the dominating organism. We provide baseline data for modeling carbon fluxes.
Patrick Jung, Laura Briegel-Williams, Anika Simon, Anne Thyssen, and Burkhard Büdel
Biogeosciences, 15, 1149–1160, https://doi.org/10.5194/bg-15-1149-2018, https://doi.org/10.5194/bg-15-1149-2018, 2018
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Arctic, Antarctic and alpine biological soil crusts (BSCs) are formed by adhesion of soil particles to cyanobacteria. BSCs influence ecosystems services like soil erodibility and chemical cycles. In cold environments degradation rates are low and BSCs increase soil organic carbon through photosynthesis, whereby these soils are considered as CO2 sinks. This work provides a novel method to visualize BSCs with a focus on cyanobacteria and their contribution to soil organic carbon.
Burkhard Büdel, Wendy J. Williams, and Hans Reichenberger
Biogeosciences, 15, 491–505, https://doi.org/10.5194/bg-15-491-2018, https://doi.org/10.5194/bg-15-491-2018, 2018
Short summary
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We report on the net primary productivity of a biological soil crust from the Boodjamulla NP, Queensland. Metabolic activity lasted from September 2010 to mid-April 2011, referring to 23.6 % of the total time of the year. The first months of activity had a respiratory loss of CO2. Of the metabolic active period, 48.6 % were photosynthesis and 51.4 % dark respiration. Carbon gain was 1.72 g m−2 yr−1. The gas exchange pattern was divided into metabolically inactive winter and active summer month.
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Biogeosciences, 20, 2769–2784, https://doi.org/10.5194/bg-20-2769-2023, https://doi.org/10.5194/bg-20-2769-2023, 2023
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Haiyang Shi, Geping Luo, Olaf Hellwich, Alishir Kurban, Philippe De Maeyer, and Tim Van de Voorde
Biogeosciences, 20, 2727–2741, https://doi.org/10.5194/bg-20-2727-2023, https://doi.org/10.5194/bg-20-2727-2023, 2023
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Josué Delgado-Balbuena, Henry W. Loescher, Carlos A. Aguirre-Gutiérrez, Teresa Alfaro-Reyna, Luis F. Pineda-Martínez, Rodrigo Vargas, and Tulio Arredondo
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German Vargas Gutiérrez, Daniel Pérez-Aviles, Nanette Raczka, Damaris Pereira-Arias, Julián Tijerín-Triviño, L. David Pereira-Arias, David Medvigy, Bonnie G. Waring, Ember Morrisey, Edward Brzostek, and Jennifer S. Powers
Biogeosciences, 20, 2143–2160, https://doi.org/10.5194/bg-20-2143-2023, https://doi.org/10.5194/bg-20-2143-2023, 2023
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To study whether nutrient availability controls tropical dry forest responses to reductions in soil moisture, we established the first troughfall exclusion experiment in a tropical dry forest plantation system crossed with a fertilization scheme. We found that the effects of fertilization on net primary productivity are larger than the effects of a ~15 % reduction in soil moisture, although in many cases we observed an interaction between drought and nutrient additions, suggesting colimitation.
Alina Lucia Ludat and Simon Kübler
Biogeosciences, 20, 1991–2012, https://doi.org/10.5194/bg-20-1991-2023, https://doi.org/10.5194/bg-20-1991-2023, 2023
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Satellite-based analysis illustrates the impact of geological processes for the stability of the ecosystem in the Mara River basin (Kenya/Tanzania). Newly detected fault activity influences the course of river networks and modifies erosion–deposition patterns. Tectonic surface features and variations in rock chemistry lead to localized enhancement of clay and soil moisture values and seasonally stabilised vegetation growth patterns in this climatically vulnerable region.
Erica Jaakkola, Antje Gärtner, Anna Maria Jönsson, Karl Ljung, Per-Ola Olsson, and Thomas Holst
Biogeosciences, 20, 803–826, https://doi.org/10.5194/bg-20-803-2023, https://doi.org/10.5194/bg-20-803-2023, 2023
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Increased spruce bark beetle outbreaks were recently seen in Sweden. When Norway spruce trees are attacked, they increase their production of VOCs, attempting to kill the beetles. We provide new insights into how the Norway spruce act when infested and found the emitted volatiles to increase up to 700 times and saw a change in compound blend. We estimate that the 2020 bark beetle outbreak in Sweden could have increased the total monoterpene emissions from the forest by more than 10 %.
Georg Wohlfahrt, Albin Hammerle, Felix M. Spielmann, Florian Kitz, and Chuixiang Yi
Biogeosciences, 20, 589–596, https://doi.org/10.5194/bg-20-589-2023, https://doi.org/10.5194/bg-20-589-2023, 2023
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The trace gas carbonyl sulfide (COS), which is taken up by plant leaves in a process very similar to photosynthesis, is thought to be a promising proxy for the gross uptake of carbon dioxide by plants. Here we propose a new framework for estimating a key metric to that end, the so-called leaf relative uptake rate. The values we deduce by applying principles of plant optimality are considerably lower than published values and may help reduce the uncertainty of the global COS budget.
François Jonard, Andrew F. Feldman, Daniel J. Short Gianotti, and Dara Entekhabi
Biogeosciences, 19, 5575–5590, https://doi.org/10.5194/bg-19-5575-2022, https://doi.org/10.5194/bg-19-5575-2022, 2022
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We investigate the spatial and temporal patterns of light and water limitation in plant function at the ecosystem scale. Using satellite observations, we characterize the nonlinear relationships between sun-induced chlorophyll fluorescence (SIF) and water and light availability. This study highlights that soil moisture limitations on SIF are found primarily in drier environments, while light limitations are found in intermediately wet regions.
Nikolai Knapp, Sabine Attinger, and Andreas Huth
Biogeosciences, 19, 4929–4944, https://doi.org/10.5194/bg-19-4929-2022, https://doi.org/10.5194/bg-19-4929-2022, 2022
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The biomass of forests is determined by forest growth and mortality. These quantities can be estimated with different methods such as inventories, remote sensing and modeling. These methods are usually being applied at different spatial scales. The scales influence the obtained frequency distributions of biomass, growth and mortality. This study suggests how to transfer between scales, when using forest models of different complexity for a tropical forest.
Kai Chen, Kevin S. Burgess, Fangliang He, Xiang-Yun Yang, Lian-Ming Gao, and De-Zhu Li
Biogeosciences, 19, 4801–4810, https://doi.org/10.5194/bg-19-4801-2022, https://doi.org/10.5194/bg-19-4801-2022, 2022
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Why does plants' distributional range size vary enormously? This study provides evidence that seed mass, intraspecific seed mass variation, seed dispersal mode and phylogeny contribute to explaining species distribution variation on a geographic scale. Our study clearly shows the importance of including seed life-history traits in modeling and predicting the impact of climate change on species distribution of seed plants.
Ying Ying Chen, Huan Yang, Gen Sheng Bao, Xiao Pan Pang, and Zheng Gang Guo
Biogeosciences, 19, 4521–4532, https://doi.org/10.5194/bg-19-4521-2022, https://doi.org/10.5194/bg-19-4521-2022, 2022
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Investigating the effect of the presence of plateau pikas on ecosystem services of alpine meadows is helpful to understand the role of the presence of small mammalian herbivores in grasslands. The results of this study showed that the presence of plateau pikas led to higher biodiversity conservation, soil nitrogen and phosphorus maintenance, and carbon sequestration of alpine meadows, whereas it led to lower forage available to livestock and water conservation of alpine meadows.
Clement Jean Frédéric Delcourt and Sander Veraverbeke
Biogeosciences, 19, 4499–4520, https://doi.org/10.5194/bg-19-4499-2022, https://doi.org/10.5194/bg-19-4499-2022, 2022
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This study provides new equations that can be used to estimate aboveground tree biomass in larch-dominated forests of northeast Siberia. Applying these equations to 53 forest stands in the Republic of Sakha (Russia) resulted in significantly larger biomass stocks than when using existing equations. The data presented in this work can help refine biomass estimates in Siberian boreal forests. This is essential to assess changes in boreal vegetation and carbon dynamics.
Iris Johanna Aalto, Eduardo Eiji Maeda, Janne Heiskanen, Eljas Kullervo Aalto, and Petri Kauko Emil Pellikka
Biogeosciences, 19, 4227–4247, https://doi.org/10.5194/bg-19-4227-2022, https://doi.org/10.5194/bg-19-4227-2022, 2022
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Tree canopies are strong moderators of understory climatic conditions. In tropical areas, trees cool down the microclimates. Using remote sensing and field measurements we show how even intermediate canopy cover and agroforestry trees contributed to buffering the hottest temperatures in Kenya. The cooling effect was the greatest during hot days and in lowland areas, where the ambient temperatures were high. Adopting agroforestry practices in the area could assist in mitigating climate change.
Jing Wang and Xuefa Wen
Biogeosciences, 19, 4197–4208, https://doi.org/10.5194/bg-19-4197-2022, https://doi.org/10.5194/bg-19-4197-2022, 2022
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Excess radiation and low temperatures exacerbate drought impacts on canopy conductance (Gs) among transects. The primary determinant of drought stress on Gs was soil moisture on the Loess Plateau (LP) and the Mongolian Plateau (MP), whereas it was the vapor pressure deficit on the Tibetan Plateau (TP). Radiation exhibited a negative effect on Gs via drought stress within transects, while temperature had negative effects on stomatal conductance on the TP but no effect on the LP and MP.
Sylvain Monteux, Janine Mariën, and Eveline J. Krab
Biogeosciences, 19, 4089–4105, https://doi.org/10.5194/bg-19-4089-2022, https://doi.org/10.5194/bg-19-4089-2022, 2022
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Quantifying the feedback from the decomposition of thawing permafrost soils is crucial to establish adequate climate warming mitigation scenarios. Past efforts have focused on abiotic and to some extent microbial drivers of decomposition but not biotic drivers such as soil fauna. We added soil fauna (Collembola Folsomia candida) to permafrost, which introduced bacterial taxa without affecting bacterial communities as a whole but increased CO2 production (+12 %), presumably due to priming.
Mirjam Pfeiffer, Munir P. Hoffmann, Simon Scheiter, William Nelson, Johannes Isselstein, Kingsley Ayisi, Jude J. Odhiambo, and Reimund Rötter
Biogeosciences, 19, 3935–3958, https://doi.org/10.5194/bg-19-3935-2022, https://doi.org/10.5194/bg-19-3935-2022, 2022
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Smallholder farmers face challenges due to poor land management and climate change. We linked the APSIM crop model and the aDGVM2 vegetation model to investigate integrated management options that enhance ecosystem functions and services. Sustainable intensification moderately increased yields. Crop residue grazing reduced feed gaps but not for dry-to-wet season transitions. Measures to improve soil water and nutrient status are recommended. Landscape-level ecosystem management is essential.
Marina Corrêa Scalon, Imma Oliveras Menor, Renata Freitag, Karine S. Peixoto, Sami W. Rifai, Beatriz Schwantes Marimon, Ben Hur Marimon Junior, and Yadvinder Malhi
Biogeosciences, 19, 3649–3661, https://doi.org/10.5194/bg-19-3649-2022, https://doi.org/10.5194/bg-19-3649-2022, 2022
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We investigated dynamic nutrient flow and demand in a typical savanna and a transition forest to understand how similar soils and the same climate dominated by savanna vegetation can also support forest-like formations. Savanna relied on nutrient resorption from wood, and nutrient demand was equally partitioned between leaves, wood and fine roots. Transition forest relied on resorption from the canopy biomass and nutrient demand was predominantly driven by leaves.
Emma Bousquet, Arnaud Mialon, Nemesio Rodriguez-Fernandez, Stéphane Mermoz, and Yann Kerr
Biogeosciences, 19, 3317–3336, https://doi.org/10.5194/bg-19-3317-2022, https://doi.org/10.5194/bg-19-3317-2022, 2022
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Pre- and post-fire values of four climate variables and four vegetation variables were analysed at the global scale, in order to observe (i) the general fire likelihood factors and (ii) the vegetation recovery trends over various biomes. The main result of this study is that L-band vegetation optical depth (L-VOD) is the most impacted vegetation variable and takes the longest to recover over dense forests. L-VOD could then be useful for post-fire vegetation recovery studies.
Chen Yang, Yue Shi, Wenjuan Sun, Jiangling Zhu, Chengjun Ji, Yuhao Feng, Suhui Ma, Zhaodi Guo, and Jingyun Fang
Biogeosciences, 19, 2989–2999, https://doi.org/10.5194/bg-19-2989-2022, https://doi.org/10.5194/bg-19-2989-2022, 2022
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Quantifying China's forest biomass C pool is important in understanding C cycling in forests. However, most of studies on forest biomass C pool were limited to the period of 2004–2008. Here, we used a biomass expansion factor method to estimate C pool from 1977 to 2018. The results suggest that afforestation practices, forest growth, and environmental changes were the main drivers of increased C sink. Thus, this study provided an essential basis for achieving China's C neutrality target.
Anne Schucknecht, Bumsuk Seo, Alexander Krämer, Sarah Asam, Clement Atzberger, and Ralf Kiese
Biogeosciences, 19, 2699–2727, https://doi.org/10.5194/bg-19-2699-2022, https://doi.org/10.5194/bg-19-2699-2022, 2022
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Actual maps of grassland traits could improve local farm management and support environmental assessments. We developed, assessed, and applied models to estimate dry biomass and plant nitrogen (N) concentration in pre-Alpine grasslands with drone-based multispectral data and canopy height information. Our results indicate that machine learning algorithms are able to estimate both parameters but reach a better level of performance for biomass.
Ramona J. Heim, Andrey Yurtaev, Anna Bucharova, Wieland Heim, Valeriya Kutskir, Klaus-Holger Knorr, Christian Lampei, Alexandr Pechkin, Dora Schilling, Farid Sulkarnaev, and Norbert Hölzel
Biogeosciences, 19, 2729–2740, https://doi.org/10.5194/bg-19-2729-2022, https://doi.org/10.5194/bg-19-2729-2022, 2022
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Fires will probably increase in Arctic regions due to climate change. Yet, the long-term effects of tundra fires on carbon (C) and nitrogen (N) stocks and cycling are still unclear. We investigated the long-term fire effects on C and N stocks and cycling in soil and aboveground living biomass.
We found that tundra fires did not affect total C and N stocks because a major part of the stocks was located belowground in soils which were largely unaltered by fire.
Aileen B. Baird, Edward J. Bannister, A. Robert MacKenzie, and Francis D. Pope
Biogeosciences, 19, 2653–2669, https://doi.org/10.5194/bg-19-2653-2022, https://doi.org/10.5194/bg-19-2653-2022, 2022
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Forest environments contain a wide variety of airborne biological particles (bioaerosols) important for plant and animal health and biosphere–atmosphere interactions. Using low-cost sensors and a free-air carbon dioxide enrichment (FACE) experiment, we monitor the impact of enhanced CO2 on airborne particles. No effect of the enhanced CO2 treatment on total particle concentrations was observed, but a potential suppression of high concentration bioaerosol events was detected under enhanced CO2.
Melanie S. Verlinden, Hamada AbdElgawad, Arne Ven, Lore T. Verryckt, Sebastian Wieneke, Ivan A. Janssens, and Sara Vicca
Biogeosciences, 19, 2353–2364, https://doi.org/10.5194/bg-19-2353-2022, https://doi.org/10.5194/bg-19-2353-2022, 2022
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Zea mays grows in mesocosms with different soil nutrition levels. At low phosphorus (P) availability, leaf physiological activity initially decreased strongly. P stress decreased over the season. Arbuscular mycorrhizal fungi (AMF) symbiosis increased over the season. AMF symbiosis is most likely responsible for gradual reduction in P stress.
Guoyu Lan, Bangqian Chen, Chuan Yang, Rui Sun, Zhixiang Wu, and Xicai Zhang
Biogeosciences, 19, 1995–2005, https://doi.org/10.5194/bg-19-1995-2022, https://doi.org/10.5194/bg-19-1995-2022, 2022
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Little is known about the impact of rubber plantations on diversity of the Great Mekong Subregion. In this study, we uncovered latitudinal gradients of plant diversity of rubber plantations. Exotic species with high dominance result in loss of plant diversity of rubber plantations. Not all exotic species would reduce plant diversity of rubber plantations. Much more effort should be made to balance agricultural production with conservation goals in this region.
Ulrike Hiltner, Andreas Huth, and Rico Fischer
Biogeosciences, 19, 1891–1911, https://doi.org/10.5194/bg-19-1891-2022, https://doi.org/10.5194/bg-19-1891-2022, 2022
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Quantifying biomass loss rates due to stem mortality is important for estimating the role of tropical forests in the global carbon cycle. We analyse the consequences of long-term elevated stem mortality for tropical forest dynamics and biomass loss. Based on simulations, we developed a statistical model to estimate biomass loss rates of forests in different successional states from forest attributes. Assuming a doubling of tree mortality, biomass loss increased from 3.2 % yr-1 to 4.5 % yr-1.
Jon Cranko Page, Martin G. De Kauwe, Gab Abramowitz, Jamie Cleverly, Nina Hinko-Najera, Mark J. Hovenden, Yao Liu, Andy J. Pitman, and Kiona Ogle
Biogeosciences, 19, 1913–1932, https://doi.org/10.5194/bg-19-1913-2022, https://doi.org/10.5194/bg-19-1913-2022, 2022
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Although vegetation responds to climate at a wide range of timescales, models of the land carbon sink often ignore responses that do not occur instantly. In this study, we explore the timescales at which Australian ecosystems respond to climate. We identified that carbon and water fluxes can be modelled more accurately if we include environmental drivers from up to a year in the past. The importance of antecedent conditions is related to ecosystem aridity but is also influenced by other factors.
Qing Sun, Valentin H. Klaus, Raphaël Wittwer, Yujie Liu, Marcel G. A. van der Heijden, Anna K. Gilgen, and Nina Buchmann
Biogeosciences, 19, 1853–1869, https://doi.org/10.5194/bg-19-1853-2022, https://doi.org/10.5194/bg-19-1853-2022, 2022
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Drought is one of the biggest challenges for future food production globally. During a simulated drought, pea and barley mainly relied on water from shallow soil depths, independent of different cropping systems.
David Kienle, Anna Walentowitz, Leyla Sungur, Alessandro Chiarucci, Severin D. H. Irl, Anke Jentsch, Ole R. Vetaas, Richard Field, and Carl Beierkuhnlein
Biogeosciences, 19, 1691–1703, https://doi.org/10.5194/bg-19-1691-2022, https://doi.org/10.5194/bg-19-1691-2022, 2022
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Volcanic islands consist mainly of basaltic rocks. Additionally, there are often occurrences of small phonolite rocks differing in color and surface. On La Palma (Canary Islands), phonolites appear to be more suitable for plants than the omnipresent basalts. Therefore, we expected phonolites to be species-rich with larger plant individuals compared to the surrounding basaltic areas. Indeed, as expected, we found more species on phonolites and larger plant individuals in general.
Vera Porwollik, Susanne Rolinski, Jens Heinke, Werner von Bloh, Sibyll Schaphoff, and Christoph Müller
Biogeosciences, 19, 957–977, https://doi.org/10.5194/bg-19-957-2022, https://doi.org/10.5194/bg-19-957-2022, 2022
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The study assesses impacts of grass cover crop cultivation on cropland during main-crop off-season periods applying the global vegetation model LPJmL (V.5.0-tillage-cc). Compared to simulated bare-soil fallowing practices, cover crops led to increased soil carbon content and reduced nitrogen leaching rates on the majority of global cropland. Yield responses of main crops following cover crops vary with location, duration of altered management, crop type, water regime, and tillage practice.
Tzu-Hsuan Tu, Li-Ling Chen, Yi-Ping Chiu, Li-Hung Lin, Li-Wei Wu, Francesco Italiano, J. Bruce H. Shyu, Seyed Naser Raisossadat, and Pei-Ling Wang
Biogeosciences, 19, 831–843, https://doi.org/10.5194/bg-19-831-2022, https://doi.org/10.5194/bg-19-831-2022, 2022
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This investigation of microbial biogeography in terrestrial mud volcanoes (MVs) covers study sites over a geographic distance of up to 10 000 km across the Eurasian continent. It compares microbial community compositions' coupling with geochemical data across a 3D space. We demonstrate that stochastic processes operating at continental scales and environmental filtering at local scales drive the formation of patchy habitats and the pattern of diversification for microbes in terrestrial MVs.
Cited articles
Anagnostidis, K. and Komarek, J.: Cyanoprokariota, Teil 2: Oscillatoriales, Gustav Fischer Verlag, Berlin, 2005.
Aranibar, J. N., Otter, L., Macko, S. A., Feral, C. J. W., Epstein, H. E., Dowty, P. R., Eckardt, F., Shugart, H. H., and Swap, R. J.: Nitrogen cycling in the soil–plant system along a precipitation gradient in the Kalahari sands, Glob. Change Biol., 10, 359–373, https://doi.org/10.1111/j.1365-2486.2003.00698.x, 2004.
Baran, R., Brodie, E. L., Mayberry-Lewis, J., Hummel, E., Rocha, U. N. D., Chakraborty, R., Bowen, B. P., Karaoz, U., Cadillo-Quiroz, H., Garcia-Pichel, F., and Northen, T. R.: Exometabolite niche partitioning among sympatric soil bacteria, Nat. Commun., 6, ncomms9289, https://doi.org/10.1038/ncomms9289, 2015.
Barger, N. N., Weber, B., Garcia-Pichel, F., Zaady, E., and Belnap, J.: Patterns and Controls on Nitrogen Cycling of Biological Soil Crusts, in: Biological Soil Crusts: An Organizing Principle in Drylands, Springer, Cham, 257–285, 2016.
Barnes, J. D., Balaguer, L., Manrique, E., Elvira, S., and Davison, A. W.: A reappraisal of the use of DMSO for the extraction and determination of chlorophylls a and b in lichens and higher plants, Environ. Exp. Bot., 32, 85–100, https://doi.org/10.1016/0098-8472(92)90034-Y, 1992.
Belnap, J.: Factors Influencing Nitrogen Fixation and Nitrogen Release in Biological Soil Crusts, in: Biological Soil Crusts: Structure, Function, and Management, Springer, Berlin, Heidelberg, 241–261, 2003.
Berrendero, E., Valiente, E. F., Perona, E., Gómez, C. L., Loza, V., Muñoz-Martín, M. Á., and Mateo, P.: Nitrogen fixation in a non-heterocystous cyanobacterial mat from a mountain river, Sci. Rep., 6, srep30920, https://doi.org/10.1038/srep30920, 2016.
Büdel, B., Darienko, T., Deutschewitz, K., Dojani, S., Friedl, T., Mohr, K. I., Salisch, M., Reisser, W., and Weber, B.: Southern African biological soil crusts are ubiquitous and highly diverse in drylands, being restricted by rainfall frequency, Microb. Ecol., 57, 229–247, https://doi.org/10.1007/s00248-008-9449-9, 2009.
Büdel, B., Williams, W. J., and Reichenberger, H.: Annual net primary productivity of a cyanobacteria-dominated biological soil crust in the Gulf Savannah, Queensland, Australia, Biogeosciences, 15, 491–505, https://doi.org/10.5194/bg-15-491-2018, 2018.
Castillo-Monroy, A. P., Maestre, F. T., Delgado-Baquerizo, M., and Gallardo, A.: Biological soil crusts modulate nitrogen availability in semi-arid ecosystems: insights from a Mediterranean grassland, Plant Soil, 333, 21–34, https://doi.org/10.1007/s11104-009-0276-7, 2010.
Chen, L., Rossi, F., Deng, S., Liu, Y., Wang, G., Adessi, A., and De Philippis, R.: Macromolecular and chemical features of the excreted extracellular polysaccharides in induced biological soil crusts of different ages, Soil Biol. Biochem., 78, 1–9, https://doi.org/10.1016/j.soilbio.2014.07.004, 2014.
De Philippis, R. D., Sili, C., and Vincenzini, M.: Response of an exopolysaccharide-producing heterocystous cyanobacterium to changes in metabolic carbon flux, J. Appl. Phycol., 8, 275–281, https://doi.org/10.1007/BF02178570, 1996.
Dojani, S., Büdel, B., Deutschewitz, K., and Weber, B.: Rapid succession of Biological Soil Crusts after experimental disturbance in the Succulent Karoo, South Africa, Appl. Soil Ecol., 48, 263–269, https://doi.org/10.1016/j.apsoil.2011.04.013, 2011.
Elbert, W., Weber, B., Burrows, S., Steinkamp, J., Büdel, B., Andreae, M. O., and Pöschl, U.: Contribution of cryptogamic covers to the global cycles of carbon and nitrogen, Nat. Geosci., 5, 459–462, https://doi.org/10.1038/ngeo1486, 2012.
Eldridge, D. J. and Leys, J. F.: Exploring some relationships between biological soil crusts, soil aggregation and wind erosion, J. Arid Environ., 53, 457–466, https://doi.org/10.1006/jare.2002.1068, 2003.
Eldridge, D. J., Bowker, M. A., Maestre, F. T., Alonso, P., Mau, R. L., Papadopoulos, J., and Escudero, A.: Interactive Effects of Three Ecosystem Engineers on Infiltration in a Semi-Arid Mediterranean Grassland, Ecosystems, 13, 499–510, https://doi.org/10.1007/s10021-010-9335-4, 2010.
Eldridge, D. J., Poore, A. G. B., Ruiz-Colmenero, M., Letnic, M., and Soliveres, S.: Ecosystem structure, function, and composition in rangelands are negatively affected by livestock grazing, Ecol. Appl., 26, 1273–1283, https://doi.org/10.1890/15-1234, 2016.
Evans, R. D. and Ehleringer, J. R.: Water and Nitrogen Dynamics in an Arid Woodland, Oecologia, 99, 233–242, 1994.
Gianello, C. and Bremner, J. M.: Comparison of chemical methods of assessing potentially available organic nitrogen in soil, Commun. Soil Sci. Plan., 17, 215–236, https://doi.org/10.1080/00103628609367709, 1986.
Hawkes, C. V.: Nitrogen Cycling Mediated by Biological Soil Crusts and Arbuscular Mycorrhizal Fungi, Ecology, 84, 1553–1562, https://doi.org/10.1890/0012-9658(2003)084[1553:NCMBBS]2.0.CO;2, 2003.
Helm, R. F. and Potts, M.: Extracellular Matrix (ECM), in: Ecology of Cyanobacteria II, Springer, Dordrecht, 461–480, 2012.
Holt, J. A. and Coventry, R. J.: Nutrient Cycling in Australian Savannas, J. Biogeogr., 17, 427–432, https://doi.org/10.2307/2845373, 1990.
Jeanfils, J. and Tack, J. P.: Identification and study of growth and nitrogenase activity of nitrogen fixing cyanobacteria from tropical soil, Vegetatio, 103, 59–66, https://doi.org/10.1007/BF00033417, 1992.
Johnson, S. L., Neuer, S., and Garcia-Pichel, F.: Export of nitrogenous compounds due to incomplete cycling within biological soil crusts of arid lands, Environ. Microbiol., 9, 680–689, https://doi.org/10.1111/j.1462-2920.2006.01187.x, 2007.
Jones, C. G., Lawton, J. H., and Shachak, M.: Organisms as Ecosystem Engineers, in Ecosystem Management, Springer, New York, NY, 130–147, 1994.
Komárek, J.: Süsswasserflora Von Mitteleuropa: Cyanoprokaryota, Heterocytous Genera, Springer, 2013.
Komarek, J. and Anagnostidis, K.: Susswasserflora von Mitteleuropa Band 19/1 Cyanoprokaryota I, Chroococcales Gustav Fisch, Verlag, 1999.
Lüttge, U.: Cyanobacterial Tintenstrich Communities and their Ecology, Naturwissenschaften, 84, 526–534, https://doi.org/10.1007/s001140050439, 1997.
Maestre, F. T., Castillo-Monroy, A. P., Bowker, M. A., and Ochoa-Hueso, R.: Species richness effects on ecosystem multifunctionality depend on evenness, composition and spatial pattern, J. Ecol., 100, 317–330, https://doi.org/10.1111/j.1365-2745.2011.01918.x, 2012.
Magee, W. E. and Burris, R. H.: Fixation of N2 and Utilization of Combined Nitrogen by Nostoc muscorum, American Journal of Botany, 41, 777–782, https://doi.org/10.2307/2438966, 1954.
Mayland, H. F. and Mcintosh, T. H.: Availability of Biologically Fixed Atmospheric Nitrogen-15 to Higher Plants, Nature, 209, 421–422, https://doi.org/10.1038/209421a0, 1966.
Minitab: MINITAB Reference Manual, Release 16.1, Minitab Inc. 3081 Enterprise Drive, State College PA 16801-3008, 2010.
Murukesan, G., Leino, H., Mäenpää, P., Ståhle, K., Raksajit, W., Lehto, H. J., Allahverdiyeva-Rinne, Y., and Lehto, K.: Pressurized Martian-Like Pure CO2 Atmosphere Supports Strong Growth of Cyanobacteria, and Causes Significant Changes in their Metabolism, Origins of Life and Evolution of Biospheres, 46, 119–131, https://doi.org/10.1007/s11084-015-9458-x, 2016.
Nadelhoffer, K. J. and Fry, B.: N-isotope studies in forests, Stable Isot. Ecol. Environ. Sci. Oxf. Blackwell, 22–62, 1994.
Nix, H., Mackey, B., Traill, B., and Woinarski, J.: The Nature of Northern Australia: its natural values, ecological processes and future prospects, ANU Press, available from: http://www.oapen.org/search?identifier=459382 (last access: 1 September 2017), 2013.
Otero, A. and Vincenzini, M.: Extracellular polysaccharide synthesis by Nostoc strains as affected by N source and light intensity, J. Biotechnol., 102, 143–152, 2003.
Otero, A. and Vincenzini, M.: Nostoc (cyanophyceae) Goes Nude: Extracellular Polysaccharides Serve as a Sink for Reducing Power Under Unbalanced C/N Metabolism1, J. Phycol., 40, 74–81, https://doi.org/10.1111/j.0022-3646.2003.03-067.x, 2004.
Rascher, U., Lakatos, M., Büdel, B., and Lüttge, U.: Photosynthetic field capacity of cyanobacteria of a tropical inselberg of the Guiana Highlands, Eur. J. Phycol., 38, 247–256, https://doi.org/10.1080/0967026031000121679, 2003.
Rossi, F. and De Philippis, R.: Role of Cyanobacterial Exopolysaccharides in Phototrophic Biofilms and in Complex Microbial Mats, Life, 5, 1218–1238, https://doi.org/10.3390/life5021218, 2015.
Rossi, F., Mugnai, G., and Philippis, R. D.: Complex role of the polymeric matrix in biological soil crusts, Plant Soil, 5, 1–16, https://doi.org/10.1007/s11104-017-3441-4, 2017.
Russow, R., Veste, M., and Böhme, F.: A natural 15N approach to determine the biological fixation of atmospheric nitrogen by biological soil crusts of the Negev Desert, Rapid Commun. Mass Sp., 19, 3451–3456, https://doi.org/10.1002/rcm.2214, 2005.
Schneegurt, M. A., Sherman, D. M., Nayar, S., and Sherman, L. A.: Oscillating behavior of carbohydrate granule formation and dinitrogen fixation in the cyanobacterium Cyanothece sp. strain ATCC 51142, J. Bacteriol., 176, 1586–1597, https://doi.org/10.1128/jb.176.6.1586-1597.1994, 1994.
Smith, D. M. S., McKeon, G. M., Watson, I. W., Henry, B. K., Stone, G. S., Hall, W. B., and Howden, S. M.: Learning from episodes of degradation and recovery in variable Australian rangelands, P. Natl. Acad. Sci. USA, 104, 20690–20695, https://doi.org/10.1073/pnas.0704837104, 2007.
Stal, L. J.: Physiological ecology of cyanobacteria in microbial mats and other communities, New Phytol., 131, 1–32, https://doi.org/10.1111/j.1469-8137.1995.tb03051.x, 1995.
Stewart, W. D. P.: Some Aspects of Structure and Function in N Fixing Cyanobacteria, Annu. Rev. Microbiol., 34, 497–536, https://doi.org/10.1146/annurev.mi.34.100180.002433, 1980.
Stewart, W. D. P., Fitzgerald, G. P., and Burris, R. H.: Acetylene reduction by nitrogen-fixing blue-green algae, Arch. Mikrobiol., 62, 336–348, https://doi.org/10.1007/BF00425639, 1968.
Prasanna, R., Tiwari, O. N., Dhar, D. W., Shukla, H. M., Singh, P. K., and Tiwari, G. L.: Growth and nitrogen fixation by non-heterocystous filamentous cyanobacteria of rice fields of Uttar Pradesh, India, Philipp. J. Sci., 129, 101–107, 2000.
Tongway, D. J. and Ludwig, J. A.: Rehabilitation of Semiarid Landscapes in Australia, I. Restoring Productive Soil Patches, Restor. Ecol., 4, 388–397, https://doi.org/10.1111/j.1526-100X.1996.tb00191.x, 1996.
Vanderduys, E. P., Kutt, A. S., and Perkins, G. C.: A significant range extension for the northern Australian gecko Strophurus taeniatus, Aust. J. Zool., 36, 20–21, https://doi.org/10.7882/AZ.2012.003, 2012.
Weaver, R. W. and Danso, S. K. A.: Dinitrogen fixation, in: Methods of Soil Analysis, Part 2, Microbiological and Biochemical PropertiesSoil Science, edited by: Weaver, R. W., Angle, J. S., and Bottomley, P. J., Society of America, Inc. Madison, 1019–1045, 1994.
Wellburn, A. R.: The Spectral Determination of Chlorophylls a and b, as well as Total Carotenoids, Using Various Solvents with Spectrophotometers of Different Resolution, J. Plant Physiol., 144, 307–313, https://doi.org/10.1016/S0176-1617(11)81192-2, 1994.
Whitton, B. A. and Potts, M.: Introduction to the Cyanobacteria, in: Ecology of Cyanobacteria II, Springer, Dordrecht, 1–13, 2012.
Williams, W. J. and Eldridge, D. J.: Deposition of sand over a cyanobacterial soil crust increases nitrogen bioavailability in a semi-arid woodland, Appl. Soil Ecol., 49, 26–31, https://doi.org/10.1016/j.apsoil.2011.07.005, 2011.
Williams, W. J., Büdel, B., Reichenberger, H., and Rose, N.: Cyanobacteria in the Australian northern savannah detect the difference between intermittent dry season and wet season rain, Biodivers. Conserv., 23, 1827–1844, https://doi.org/10.1007/s10531-014-0713-7, 2014.
Wyatt, J. T. and Silvey, J. K. G.: Nitrogen Fixation by Gloeocapsa, Science, 165, 908–909, 1969.
Zhao, Y., Zhu, Q., Li, P., Zhao, L., Wang, L., Zheng, X., and Ma, H.: Effects of artificially cultivated biological soil crusts on soil nutrients and biological activities in the Loess Plateau, J. Arid Land, 6, 742–752, https://doi.org/10.1007/s40333-014-0032-6, 2014.
Short summary
The northern Australian savannah grasslands encompass 1.5 million square kilometres, where naturally occurring cyanobacteria cover the soil surface. During the wet season, photosynthetic cyanobacteria continually absorb nitrogen from the air and produce a nutrient-rich slime. This bioactive slime formed a protective biofilm on the soil in-between grass plants and provided nitrogen in a plant-available form. Cyanobacterial species richness increased biofertilisation and boosted soil fertility.
The northern Australian savannah grasslands encompass 1.5 million square kilometres, where...
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