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Organic phosphorus regeneration enhanced since eutrophication occurred in the sub-deep reservoir
Jia Yu; Yan Zeng; Jingan Chen; Peng Liao; Haiquan Yang; Chao Yin
2022
Source PublicationEnvironmental Pollution
Volume306Pages:119350
Abstract

Lake eutrophication remains a serious environmental problem of global significance, and phosphorus (P) plays a key role in lake eutrophication. Internal P loading, as a result of P release from sediments, is gathering more and more recognition as an important source governing the P availability in these ecosystems. Anoxic condition can promote the release of P associated with Fe oxides, which has already been a consensus. However, it is still unknown whether the anoxic conditions induced by eutrophication act to intensify or weaken the regeneration of organic P (Porg) in sediments. We selected the Hongfeng Reservoir, a typical sub-deep lake, to study the regeneration behaviours of C and P in the sediments buried before and after eutrophication. The results showed that Porg did not significantly increase with the rapid increase in organic C (Corg) since eutrophication occurred. Furthermore, the organic C/P ratio was much higher in sediments buried after eutrophication than in those buried before, which indicated that Porg regeneration had been significantly enhanced since eutrophication occurred. Based on C/P ratios, our estimation suggested that the Porg regeneration and P release from sediment to water approximately enhanced 45.2% ± 8.7% and 34.5% ± 9.8%, respectively. Elevated primary productivity (algae) and the corresponding hypoxic/anoxic condition, both caused by eutrophication, promoted P biogeochemical cycle in the sub-deep reservoir. This study further verifies the significant contribution of regenerated Porg to the internal P load, and highlights the importance of controlling P release from sediments in order to restore clear water ecosystems in sub-deep lakes or reservoirs.

KeywordEutrophication Sub-deep Lake Organic Phosphorus Organic Matter Degradation C/p Ratios
DOI10.1016/j.envpol.2022.119350
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Indexed BySCI
Language英语
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Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/13432
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
2.University of Chinese Academy of Sciences, Beijing, 100049, China
Recommended Citation
GB/T 7714
Jia Yu,Yan Zeng,Jingan Chen,et al. Organic phosphorus regeneration enhanced since eutrophication occurred in the sub-deep reservoir[J]. Environmental Pollution,2022,306:119350.
APA Jia Yu,Yan Zeng,Jingan Chen,Peng Liao,Haiquan Yang,&Chao Yin.(2022).Organic phosphorus regeneration enhanced since eutrophication occurred in the sub-deep reservoir.Environmental Pollution,306,119350.
MLA Jia Yu,et al."Organic phosphorus regeneration enhanced since eutrophication occurred in the sub-deep reservoir".Environmental Pollution 306(2022):119350.
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