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Effects of seasonal hypoxia on the release of phosphorus from sediments in deep-water ecosystem: A case study in Hongfeng Reservoir, Southwest China TEXT SIZE: A A A
Using the diffusive gradients in thin films (DGT) technique and microelectrode technique, hypoxia and its effects on the release of phosphorus (P) from sediments were carefully investigated in Hongfeng Reservoir, a typical deep-water ecosystem where eutrophication and hypoxia is still an environmental challenge in Southwest China. The results suggested that hypoxia significantly promotes the release of P from sediments and the release of P under hypoxic condition mostly comes from the release of BD P. Together with the in-situ and high resolution evidences from DGT and microelectrode, the release of P from sediments under hypoxic condition was assumed to be coupled processes which are associated with the combined cycles of "P-Fe-S". Evidences from the present work implied that the internal P loadings induced by hypoxia, especially after a reduction of external P-loading, should be paid more attention in eutrophic deep-water reservoirs, Southwest China. (C) 2016 Elsevier Ltd. All rights reserved.
 

Publication name

 ENVIRONMENTAL POLLUTION, 219 858-865; 10.1016/j.envpol.2016.08.013 DEC 2016

Author(s)

 Wang, Jingfu; Chen, Jingan; Ding, Shiming; Guo, Jianyang; Christopher, Dallimore; Dai, Zhihui; Yang, Haiquan

Corresponding author(s) 

 CHEN Jingan
 chenjingan@vip.skleg.cn
 Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China.

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