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.
References
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Journal ArticleDOI
Functional diversity enhances the resistance of ecosystem multifunctionality to aridity in Mediterranean drylands
Enrique Valencia,Fernando T. Maestre,Yoann Le Bagousse-Pinguet,José L. Quero,Riin Tamme,Luca Börger,Miguel García-Gómez,Miguel García-Gómez,Nicolas Gross,Nicolas Gross +9 more
TL;DR: Maintaining and enhancing FD in plant communities may help to buffer negative effects of ongoing global environmental change on dryland multifunctionality.
Journal ArticleDOI
Carbon content and climate variability drive global soil bacterial diversity patterns
Manuel Delgado-Baquerizo,Fernando T. Maestre,Peter B. Reich,Peter B. Reich,Pankaj Trivedi,Yui Osanai,Yu-Rong Liu,Yu-Rong Liu,Kelly Hamonts,Thomas C. Jeffries,Brajesh K. Singh +10 more
TL;DR: The results provide a novel integrative view of how climate and soil factors influence soil bacterial diversity at the global scale, which is critical to improve ecosystem and earth system simulation models and for formulating sustainable ecosystem management and conservation policies.
Journal ArticleDOI
Increased forest ecosystem carbon and nitrogen storage from nitrogen rich bedrock
TL;DR: It is shown that bedrock comprises a hitherto overlooked source of ecologically available N to forests, and the possibility that bedrock N input may represent an important and overlooked component of ecosystem N and C cycling elsewhere is raised.
Journal ArticleDOI
Intransitive competition is widespread in plant communities and maintains their species richness
Santiago Soliveres,Fernando T. Maestre,Werner Ulrich,Peter Manning,Steffen Boch,Matthew A. Bowker,Daniel Prati,Manuel Delgado-Baquerizo,José L. Quero,Ingo Schöning,Antonio Gallardo,Wolfgang W. Weisser,Jörg Müller,Stephanie A. Socher,Miguel García-Gómez,Victoria Ochoa,Ernst Detlef Schulze,Markus Fischer,Eric Allan +18 more
TL;DR: It is shown that intransitivity is widespread in nature and increases diversity, but it can be lost with environmental homogenisation, and effects of two major drivers of biodiversity loss (aridity and land-use intensification) on intransitive and species richness.
Journal ArticleDOI
Clay Mineralogy in Relation to Survival of Soil Bacteria
TL;DR: This review is restricted to (a) the influence of clay minerals on bacterial survival and (b) the development of a conceptual basis for more realistic future studies on the role of Clay minerals in modifying the survival of bacteria in soils.