Show simple item record

dc.contributor.authorHepper, Estela Noemi
dc.contributor.authorPrina, Aníbal Oscar
dc.contributor.authorDelgado-Baquerizo, Manuel
dc.contributor.authorMaestre, Fernando T.
dc.contributor.authorGallardo, Antonio
dc.contributor.authorBowker, Matthew A.
dc.contributor.authorWallenstein, Matthew D.
dc.contributor.authorQuero, Jose Luis
dc.descriptionEl texto completo de este documento se accede desde computadoras de la UNLPam.
dc.description.abstractThe biogeochemical cycles of carbon (C), nitrogen (N) and phosphorus (P) are interlinked by primary production, respiration and decomposition in terrestrial ecosystems1 . 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 processes1–5. 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 availability6–8. The increase in aridity predicted for the twenty-first century in many drylands worldwide9–11 may therefore threaten the balance between these cycles, differentially affecting the availability of essential nutrients12–14. 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 decomposition12–14. 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.
dc.format.extentp. 672-676
dc.publisherSpringer Nature
dc.sourceNature. 2013; vol.502 no.7473
dc.titleDecoupling of soil nutrient cycles as a function of aridity in global drylands
dc.unlpam.instituciondeorigenFacultad de Agronomía
dc.unlpam.filiacionHepper, Estela Noemi. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina.
dc.unlpam.filiacionPrina, Aníbal Oscar. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina.
dc.unlpam.filiacionDelgado-Baquerizo, Manuel. Universidad Rey Juan Carlos. Escuela Superior de Ciencias Experimentales y Tecnología; España.
dc.unlpam.filiacionMaestre, Fernando T.. Universidad Rey Juan Carlos. Escuela Superior de Ciencias Experimentales y Tecnología; España.
dc.unlpam.filiacionGallardo, Antonio. Universidad Pablo de Olavide; España.
dc.unlpam.filiacionBowker, Matthew A.. Northern Arizona University; EEUU.
dc.unlpam.filiacionWallenstein, Matthew D.. Universidad Estatal de Colorado; EEUU.
dc.unlpam.filiacionQuero, Jose Luis. Universidad Rey Juan Carlos. Escuela Superior de Ciencias Experimentales y Tecnología; España.

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Universidad Nacional de La Pampa
Biblioteca Central | Cnel.Gil 353 1er Sub | Tel.(02954) 451645 |
Santa Rosa | La Pampa | Argentina | ©2020
DSpace soft copyright © 2002-2016  DuraSpaceTheme by 
Atmire NV