Phosphorus accumulates faster than nitrogen globally in freshwater ecosystems under anthropogenic impacts
Yan, Zhengbing (Peking University. Department of Ecology)
Han, W (China Agricultural University)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Elser, James J. (Arizona State University)
Du, Enzai (Beijing Normal University. State Key Laboratory of Earth Surface Processes and Resource Ecology)
Reich, Peter (Western Sydney University. Hawkesbury Institute for the Environment)
Fang, Jingyun (Peking University. Department of Ecology)

Fecha:	2016
Resumen:	Combined effects of cumulative nutrient inputs and biogeochemical processes that occur in freshwater under anthropogenic eutrophication could lead to myriad shifts in nitrogen (N):phosphorus (P) stoichiometry in global freshwater ecosystems, but this is not yet well-assessed. Here we evaluated the characteristics of N and P stoichiometries in bodies of freshwater and their herbaceous macrophytes across human-impact levels, regions and periods. Freshwater and its macrophytes had higher N and P concentrations and lower N : P ratios in heavily than lightly human-impacted environments, further evidenced by spatiotemporal comparisons across eutrophication gradients. N and P concentrations in freshwater ecosystems were positively correlated and N : P was negatively correlated with population density in China. These results indicate a faster accumulation of P than N in human-impacted freshwater ecosystems, which could have large effects on the trophic webs and biogeochemical cycles of estuaries and coastal areas by freshwater loadings, and reinforce the importance of rehabilitating these ecosystems.
Ayudas:	European Commission 610028 Ministerio de Economía y Competitividad CGL2013-48074-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-274
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Anthropogenic impacts ; Accumulation ; Biogeochemistry ; Decoupling of nitrogen and phosphorus cycles ; Freshwater ecosystems ; Global patterns ; Imbalance ; Macrophytes ; Waterbodies
Publicado en:	Ecology letters, Vol. 19, Issue 10 (October 2016) , p. 1237-1246, ISSN 1461-0248

DOI: 10.1111/ele.12658

Postprint 38 p, 834.9 KB

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Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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