Effects of seasonal hypoxia on the release of phosphorus from sediments in deep-water ecosystem: A case study in Hongfeng Reservoir, Southwest China.
Effects of seasonal hypoxia on the release of phosphorus from sediments in deep-water ecosystem: A case study in Hongfeng Reservoir, Southwest China.
复制标题
DOI：
10.1016/j.envpol.2016.08.013
复制
发表时间：
2016-12
影响因子：
8.9
通讯作者：
Jingfu Wang;Jing-an Chen;S. Ding;Jian-yang Guo;D. Christopher;Z. Dai;Haiquan Yang
中科院分区：
文献类型：
--
作者：
Jingfu Wang;Jing-an Chen;S. Ding;Jian-yang Guo;D. Christopher;Z. Dai;Haiquan Yang
利用薄膜扩散梯度（DGT）技术和微电极技术，在富营养化和缺氧仍是西南地区一个典型的深水生态系统——红峰水库，深入研究了缺氧及其对沉积物中磷释放的影响。结果表明，低氧显著促进沉积物中磷的释放，低氧条件下的磷释放主要来源于BD-P的释放。结合DGT和微电极的现场高分辨率证据，推测低氧条件下沉积物中P的释放是与“P- fe -s”联合循环有关的耦合过程。本研究结果表明，西南富营养化深水水库缺氧引起的内部磷负荷，特别是外部磷负荷减少后的内部磷负荷应引起重视。
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 thein-situand 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.