Library

eCommons

 

Anthropogenic phosphorus inputs to a river basin and their impacts on riverine phosphorus fluxes along its upstream-downstream continuum

Simple item page
dc.contributor.authorZhang, W.S.
dc.contributor.authorSwaney, D. P.
dc.contributor.authorHong, B.
dc.contributor.authorHowarth, R. W.
dc.date.accessioned2019-01-17T14:44:39Z
dc.date.available2019-01-17T14:44:39Z
dc.date.issued2017-12-23
dc.description.abstractThe increasing trend in riverine phosphorus (P) loads resulting from anthropogenic inputs has gained wide attention because of the well-known role of P in eutrophication. So far, however, there is still limited scientific understanding of anthropogenic P inputs and their impacts on riverine flux in river reaches along the upstream-to-downstream continuum. Here we investigated P budgets in a series of nested watersheds draining into Hongze Lake of China and developed an empirical function to describe the relationship between anthropogenic inputs and riverine P fluxes. Our results indicated that there are obvious gradients regarding P budgets in response to changes in human activities. Fertilizer application and food and feed P import was always the dominant source of P inputs in all sections, followed by nonfood P. Further interpretation using the model revealed the processes of P loading to the lake. About 2%–9% of anthropogenic P inputs are transported from the various sections into the corresponding tributaries of the river systems, depending upon local precipitation rates. Of this amount, around 41%–95% is delivered to the main stem of the Huai River after in-stream attenuation in its tributaries. Ultimately, 55%–86% of the P loads delivered to different locations of the main stem are transported into the receiving lake of the downstream, due to additional losses in the main stem. An integrated P management strategy that considers the gradients of P loss along the upstream-to-downstream continuum is required to assess and optimize P management to protect the region's freshwater resource.
dc.description.sponsorshipThis study was financially supported by Talents-Import Program in Nanjing Institute of Geography and Limnology (NIGLAS2016QD04), National Natural Science Foundation of China (41701040), and Natural Science Foundation of Jiangsu Province of China (BK20171100).
dc.identifier.citationJournal of Geophysical Research: Biogeosciences, 122, 3273–3287
dc.identifier.urihttps://hdl.handle.net/1813/60831
dc.language.isoen_US
dc.publisherWiley
dc.relation.doihttps://doi.org/10.1002/2017JG004004
dc.subjecteutrophication
dc.subjecthongze lake
dc.subjectin-stream retention
dc.subjectnet anthropogenic phosphorus input (NAPI)
dc.subjectphosphorus
dc.subjectphosphorus budget
dc.titleAnthropogenic phosphorus inputs to a river basin and their impacts on riverine phosphorus fluxes along its upstream-downstream continuum
dc.typearticle
dcterms.licensehttps://hdl.handle.net/1813/60288

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Zhang_et_al-2017-Journal_of_Geophysical_Research_Biogeosciences.pdf
Size:
984.35 KB
Format:
Adobe Portable Document Format
Download

Collections

EEB Papers - Robert Howarth