Zhengbing Yan1,2, Wenxuan Han3, Josep Peñuelas4,5, Jordi Sardans4,5, James J Elser6, Enzai Du7, Peter B Reich8,9, Jingyun Fang1. 1. Department of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China. 2. College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China. 3. College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China. hanwenxuan@cau.edu.cn. 4. CSIC, Global Ecology Unit CREAF-CSIC-UAB, Cerdanyola del Vallès, 08193, Catalonia, Spain. 5. CREAF, Cerdanyola del Vallès, 08193, Catalonia, Spain. 6. School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA. 7. College of Resources Science & Technology, and State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China. 8. Department of Forest Resources, University of Minnesota, St. Paul, MN, 55108, USA. 9. Hawkesbury Institute for the Environment, Western Sydney University, Penrith, 2751, NSW, Australia.
Abstract
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.
Combined effects of cumulative nutrient inputs and biogeochemical processes that occur in freshwater under anthropogenic eutrophication could lead to myriad shifts in nitrogen (N):n>an class="Chemical">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.
Authors: Yindong Tong; Mengzhu Wang; Josep Peñuelas; Xueyan Liu; Hans W Paerl; James J Elser; Jordi Sardans; Raoul-Marie Couture; Thorjørn Larssen; Hongying Hu; Xin Dong; Wei He; Wei Zhang; Xuejun Wang; Yang Zhang; Yi Liu; Siyu Zeng; Xiangzhen Kong; Annette B G Janssen; Yan Lin Journal: Proc Natl Acad Sci U S A Date: 2020-05-08 Impact factor: 11.205
Authors: Yu-Kun Hu; Guo-Fang Liu; Xu Pan; Yao-Bin Song; Ming Dong; Johannes H C Cornelissen Journal: Sci China Life Sci Date: 2020-09-21 Impact factor: 6.038
Authors: James J Elser; Shawn P Devlin; Jinlei Yu; Adam Baumann; Matthew J Church; John E Dore; Robert O Hall; Melody Hollar; Tyler Johnson; Trista Vick-Majors; Cassidy White Journal: Proc Natl Acad Sci U S A Date: 2022-07-11 Impact factor: 12.779