Open Access
Decoupling of soil nutrient cycles as a function of
Manuel Delgado-Baquerizo,Fernando T. Maestre,Antonio Gallardo,Matthew A. Bowker,Matthew D. Wallenstein,José L. Quero,Victoria Ochoa,Beatriz Gozalo,Miguel García-Gómez,Santiago Soliveres,Pablo García-Palacios,Miguel Berdugo,Enrique Valencia,Cristina Escolar,Tulio Arredondo,Claudia Barraza-Zepeda,Donaldo Bran,José A. Carreira,Mohamed Chaieb,Abel A. Conceiça˜o,Mchich Derak,David J. Eldridge,Adrián Escudero,Carlos I. Espinosa,Juan José Gaitán,M. Gabriel Gatica,Susana Gómez-González,Elizabeth Guzman,Julio R. Gutiérrez,Adriana Florentino,E.N. Hepper,Rosa M. Hernández,Elisabeth Huber-Sannwald,Mohammad Jankju,Jushan Liu,Rebecca L. Mau,Maria N. Miriti,Jorge Monerris,Kamal Naseri,Zouhaier Noumi,Vicente Polo,Aníbal Prina,Eduardo Pucheta,Elizabeth Ramírez,David A. Ramırez Collantes,R. L. Romão,Matthew Tighe,Duilio Torres,Cristian Torres-Díaz,Eugene D. Ungar,James Val,Wanyoike Wamiti,Deli Wang,Eli Zaady +53 more
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TLDR
In this paper, the authors evaluate how aridity affects the balance between carbon (C), nitrogen (N) and phosphorus (P) in soils collected from 224 dryland sites from all continents except Antarctica and find a negative effect of aridity on the concentration of soil organic C and total N, but a positive effect on inorganic P.Abstract:
The biogeochemical cycles of carbon (C), nitrogen (N) and phosphorus (P) are interlinked by primary production, respiration and decomposition in terrestrial ecosystems. It has been suggested that the C, N and P cycles could become uncoupled under rapid climate change because of the different degrees of control exerted on the supply of these elements by biological and geochemical processes. Climatic controls on biogeochemical cycles are particularly relevant in arid, semi-arid and dry sub-humid ecosystems (drylands) because their biological activity is mainly driven by water availability. The increase in aridity predicted for the twenty-first century in many drylands worldwide may therefore threaten the balance between these cycles, differentially affecting the availability of essential nutrients. Here we evaluate how aridity affects the balance between C, N and P in soils collected from 224 dryland sites from all continents except Antarctica. We find a negative effect of aridity on the concentration of soil organic C and total N, but a positive effect on the concentration of inorganic P. Aridity is negatively related to plant cover, which may favour the dominance of physical processes such as rock weathering, a major source of P to ecosystems, over biological processes that provide more C and N, such as litter decomposition. Our findings suggest that any predicted increase in aridity with climate change will probably reduce the concentrations of N and C in global drylands, but increase that of P. These changes would uncouple the C, N and P cycles in drylands and could negatively affect the provision of key services provided by these ecosystems.read more
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DissertationDOI
Exploring the possibilities of parsimonious nitrogen modelling in different ecosystems
TL;DR: In this paper, two parsimonious nitrogen models have been developed and implemented in two different data availability scenarios, one in a semi-arid natural forest ecosystem and the other in an anthropogenic agricultural ecosystem.
Dissertation
Modelling of the topsoil organic carbon content by analysing the potential of spectroscopic techniques for digital soil mapping
TL;DR: In this article, the authors explored the capacity of spectroscopy for map soil organic carbon content at regional scale using topsoil samples from Galicia (NW-Spain) and developed a spatially non-stationary approach that allows mapping soil organic content and also identifying the factors more relevant for its accumulation in Europe.
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Journal ArticleDOI
Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil
Mingzhu He,Feike A. Dijkstra +1 more
TL;DR: In this article, an increase in P availability in a P-poor soil would increase N uptake by plants and microbes, thereby reducing N loss in terrestrial ecosystems, and they found that P addition reduced 15 N in microbes without water stress by 80% and also reduced total 15 N recovery.
Journal ArticleDOI
Soil moisture and texture primarily control the soil nutrient stoichiometry across the Tibetan grassland
Liming Tian,Liming Tian,Lin Zhao,Xiaodong Wu,Hongbing Fang,Yonghua Zhao,Guojie Hu,Guangyang Yue,Yu Sheng,Jichun Wu,Ji Chen,Zhiwei Wang,Wangping Li,Defu Zou,Chien-Lu Ping,Wen Shang,Yu-Guo Zhao,Gan-Lin Zhang +17 more
TL;DR: The results indicated that the nutrient limitation in alpine ecosystem might shifts from N-limited to P-limited or K-limited due to the increase of N deposition and decrease of soil P and K contents under the changing climate conditions and weathering stages, and suggested that soil moisture and mud content could be good predictors of topsoil nutrient stoichiometry in Tibetan grassland.
Journal ArticleDOI
Simulating rewetting events in intermittent rivers and ephemeral streams: A global analysis of leached nutrients and organic matter
Oleksandra Shumilova,Oleksandra Shumilova,Oleksandra Shumilova,Dominik Zak,Dominik Zak,Dominik Zak,Thibault Datry,Daniel von Schiller,Roland Corti,Arnaud Foulquier,Biel Obrador,Klement Tockner,Klement Tockner,Daniel C. Allan,Florian Altermatt,María Isabel Arce,María Isabel Arce,Shai Arnon,Damien Banas,Andy Banegas-Medina,Erin E. Beller,Melanie L. Blanchette,Juan F. Blanco-Libreros,Joanna Blessing,Iola G. Boëchat,Kate S. Boersma,Michael T. Bogan,Núria Bonada,Nick Bond,Kate Brintrup,Andreas Bruder,Ryan M. Burrows,Tommaso Cancellario,Stephanie M. Carlson,Sophie Cauvy-Fraunié,Núria Cid,Michael Danger,Bianca de Freitas Terra,Anna Maria De Girolamo,Rubén del Campo,Rubén del Campo,Fiona Dyer,Arturo Elosegi,Emile Faye,Catherine M. Febria,Catherine M. Febria,Richardo Figueroa,Brian Four,Mark O. Gessner,Mark O. Gessner,Pierre Gnohossou,Rosa Gómez Cerezo,Lluís Gómez-Gener,Manuel A. S. Graça,Simone Guareschi,Björn Gücker,Jason L. Hwan,Skhumbuzo Kubheka,Simone D. Langhans,Catherine Leigh,Chelsea J. Little,Chelsea J. Little,Stefan Lorenz,Jonathan C. Marshall,Angus R. McIntosh,Clara Mendoza-Lera,Elisabeth I. Meyer,Marko Miliša,Musa C. Mlambo,Marcos Moleón,Peter M. Negus,Dev K. Niyogi,Athina Papatheodoulou,Isabel Pardo,Petr Paril,Vladimir Pešić,Pablo Rodríguez-Lozano,Robert J. Rolls,M. M. Sánchez-Montoya,Ana Savić,Alisha L. Steward,Rachel Stubbington,Amina Taleb,Ross Vander Vorste,Nathan J. Waltham,Annamaria Zoppini,Christiane Zarfl +86 more
TL;DR: It is found that sediments, due to their large quantities within riverbeds, contribute most to the overall flux of dissolved substances during rewetting events, and that flux rates distinctly differ among climate zones.
Journal ArticleDOI
Climate and soil properties limit the positive effects of land use reversion on carbon storage in Eastern Australia.
Sheikh M.F. Rabbi,Matthew Tighe,Manuel Delgado-Baquerizo,Annette Cowie,Fiona Robertson,Ram C. Dalal,K. L. Page,Doug Crawford,Brian Wilson,Brian Wilson,Graeme Schwenke,Malem McLeod,Warwick Badgery,Yash P. Dang,Michael J. Bell,Garry O'Leary,De Li Liu,Jeff Baldock +17 more
TL;DR: Results suggest the greatest potential for increasing SOC stocks in Eastern Australian agricultural regions lies in converting from cropping to pasture on heavy textured soils in the humid regions.
Journal ArticleDOI
Whole-Plant Metabolic Allocation Under Water Stress.
TL;DR: The needs for additional empirical studies of whole-plant metabolic responses under multiple stresses and for refinement of existing plant growth-defense theory in the context of whole plants are highlighted.