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dc.contributor.authorLiu, Xin
dc.contributor.authorSheng, Hu
dc.contributor.authorJiang, Songyan
dc.contributor.authorYuan, Zengwei
dc.contributor.authorZhang, Chaosheng
dc.contributor.authorElser, James J.
dc.date.accessioned2018-09-20T16:14:46Z
dc.date.available2018-09-20T16:14:46Z
dc.date.issued2016-02-22
dc.identifier.citationLiu, Xin; Sheng, Hu; Jiang, Songyan; Yuan, Zengwei; Zhang, Chaosheng; Elser, James J. (2016). Intensification of phosphorus cycling in china since the 1600s. Proceedings of the National Academy of Sciences 113 (10), 2609-2614
dc.identifier.issn0027-8424,1091-6490
dc.identifier.urihttp://hdl.handle.net/10379/12475
dc.description.abstractPhosphorus (P) is an essential nutrient for living systems with emerging sustainability challenges related to supply uncertainty and aquatic eutrophication. However, its long-term temporal dynamics and subsequent effects on freshwater ecosystems are still unclear. Here, we quantify the P pathways across China over the past four centuries with a life cycle process-balanced model and evaluate the concomitant potential for eutrophication with a spatial resolution of 5 arc-minutes in 2012. We find that P cycling in China has been artificially intensified during this period to sustain the increasing population and its demand for animal protein-based diets, with continuous accumulations in inland waters and lands. In the past decade, China's international trade of P involves net exports of P chemicals and net imports of downstream crops, specifically soybeans from the United States, Brazil, and Argentina. The contribution of crop products to per capita food P demand, namely, the P directly consumed by humans, declined from over 98% before the 1950s to 76% in 2012, even though there was little change in per capita food P demand. Anthropogenic P losses to freshwater and their eutrophication potential clustered in wealthy coastal regions with dense populations. We estimate that Chinese P reserve depletion could be postponed for over 20 y by more efficient life cycle P management. Our results highlight the importance of closing the P cycle to achieve the cobenefits of P resource conservation and eutrophication mitigation in the world's most rapidly developing economy.
dc.publisherProceedings of the National Academy of Sciences
dc.relation.ispartofProceedings of the National Academy of Sciences
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectsustainability
dc.subjectphosphorus cycling
dc.subjecteutrophication
dc.subjectfood production
dc.subjectindustrial ecology
dc.subjectfresh-water
dc.subjectfood-chain
dc.subjectmanagement
dc.subjectnitrogen
dc.subjecteutrophication
dc.subjectnutrient
dc.subjectvariability
dc.subjectaquaculture
dc.subjectsystems
dc.subjectcrisis
dc.titleIntensification of phosphorus cycling in china since the 1600s
dc.typeArticle
dc.identifier.doi10.1073/pnas.1519554113
dc.local.publishedsourcehttp://www.pnas.org/content/113/10/2609.full.pdf
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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland