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- W4225315059 endingPage "119350" @default.
- W4225315059 startingPage "119350" @default.
- W4225315059 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." @default.
- W4225315059 created "2022-05-05" @default.
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- W4225315059 date "2022-08-01" @default.
- W4225315059 modified "2023-10-11" @default.
- W4225315059 title "Organic phosphorus regeneration enhanced since eutrophication occurred in the sub-deep reservoir" @default.
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- W4225315059 doi "https://doi.org/10.1016/j.envpol.2022.119350" @default.
- W4225315059 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35490996" @default.
- W4225315059 hasPublicationYear "2022" @default.
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