Phosphorus accumulates faster than nitrogen globally in freshwater ecosystems under anthropogenic impacts

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 c...

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Vydáno v:	Ecology letters Ročník 19; číslo 10; s. 1237 - 1246
Hlavní autoři:	Yan, Zhengbing, Han, Wenxuan, Peñuelas, Josep, Sardans, Jordi, Elser, James J., Du, Enzai, Reich, Peter B., Fang, Jingyun
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	England Blackwell Publishing Ltd 01.10.2016
Témata:	Accumulation anthropogenic activities Anthropogenic factors anthropogenic impacts Aquatic ecosystems Aquatic plants Biogeochemical cycles Biogeochemistry China Coastal zone coasts correlation decoupling of nitrogen and phosphorus cycles Ecosystem Estuaries Eutrophication food webs Fresh Water freshwater Freshwater ecology Freshwater ecosystems global patterns Human Activities imbalance macrophytes Nitrogen Nitrogen - chemistry Phosphorus Phosphorus - chemistry Population density stoichiometry surface water Water Pollutants, Chemical Water Pollution waterbodies China decoupling of nitrogen and phosphorus cycles stoichiometry imbalance anthropogenic impacts freshwater ecosystems macrophytes biogeochemistry Accumulation global patterns waterbodies
ISSN:	1461-023X, 1461-0248, 1461-0248
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Popis
Shrnutí:	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.
Bibliografie:	istex:D0BE3EABA8FCD86EEF726ECA178FA18B349AB70B US National Science Foundation RCN-SEES - No. 1230603 European Research Council Synergy - No. ERC-SyG-2013-610028 IMBALANCE-P Spanish Government - No. CGL2013-48074-P National Key Basic Research Program of China - No. 2014CB954202 National Natural Science Foundation of China - No. 41173083; No. 31321061; No. 31330012 ArticleID:ELE12658 ark:/67375/WNG-VPVDF92Z-Z Special Foundation of National Science and Technology Basic Research - No. 2013FY112300 Catalan Government - No. SGR 2014-274 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	1461-023X 1461-0248 1461-0248
DOI:	10.1111/ele.12658