caa a22 4500 605517304 CHVBK 20210128100719.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10533-015-0145-9 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0145-9 Net anthropogenic phosphorus inputs and riverine phosphorus fluxes in highly populated headwater watersheds in China [Elektronische Daten] [Wangshou Zhang, Dennis Swaney, Bongghi Hong, Robert Howarth, Haejin Han, Xuyong Li] Riverine phosphorus (P) levels in headwaters are a worldwide concern for environmental management due to the sensitivity of freshwater ecosystems to phosphorus loads. Here, we evaluate P in the Huai River Basin of China, a watershed with one of the highest intensities of human-activity in the world. Estimates of net anthropogenic phosphorus inputs (NAPI) were obtained by accounting for the main anthropogenic phosphorus inputs in each watershed of the basin, including fertilizer application, net food and feed import, non-food P and seeding P. Multi-year average (2003-2010) anthropogenic inputs of P to the entire basin were 2700kg P km−2year−1, with an average amount of 1800kg P km−2year−1 entering its 17 headwater watersheds. Fertilizer application was the largest source of new P across the headwater watersheds (about 70% of NAPI), followed by P content of imported food and feed (24%) and non-food P (6%). Riverine total phosphorus (TP) fluxes showed a significant linear relationship with NAPI, with an average 3.2% of NAPI exported as riverine TP flux. Our result indicates that NAPI could be a good indicator for assessing the risk of regional P loss, as well as an excellent potential predictor of riverine TP flux. A comparison of our results with other similar analyses suggests that around 3% of NAPI would be exported as riverine TP loads, although fractional export of P may vary significantly regionally. Corresponding P management should be targeted at the main anthropogenic sources and hot-spot areas. Springer International Publishing Switzerland, 2015 Watershed approach nationallicence Net anthropogenic phosphorus input (NAPI) nationallicence Phosphorus (P) nationallicence Huai River Basin (HRB) nationallicence Headwater watershed nationallicence Riverine TP flux nationallicence Zhang Wangshou State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China aut Swaney Dennis Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA aut Hong Bongghi Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA aut Howarth Robert Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA aut Han Haejin Division of Water Research, Korea Environment Institute, Sejong, Republic of Korea aut Li Xuyong State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China aut Biogeochemistry Springer International Publishing 126/3(2015-12-01), 269-283 0168-2563 126:3<269 2015 126 10533 https://doi.org/10.1007/s10533-015-0145-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0145-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Wangshou State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China aut NATIONALLICENCE 700 1- Swaney Dennis Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA aut NATIONALLICENCE 700 1- Hong Bongghi Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA aut NATIONALLICENCE 700 1- Howarth Robert Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA aut NATIONALLICENCE 700 1- Han Haejin Division of Water Research, Korea Environment Institute, Sejong, Republic of Korea aut NATIONALLICENCE 700 1- Li Xuyong State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 126/3(2015-12-01), 269-283 0168-2563 126:3<269 2015 126 10533