Preferential regeneration of P relative to C in a freshwater lake | |
Jingan Chen; Yan Zeng; Jia Yu; Jingfu Wang; Haiquan Yang; Yaoting Lu | |
2019 | |
Source Publication | Chemosphere
![]() |
Volume | 222Pages:15-21 |
Abstract | Particulate organic matter (POM) is the main carrier of carbon (C), nitrogen (N), and phosphorus (P) in the biogeochemical cycle. Previous investigations have found that the regeneration of C, N, and P is obviously different during the degradation of POM in marine environments. However, little attention has been paid to lake system thus far. In an initial attempt to characterize the regeneration behaviors of C and P in lake system, contents of C, N, and P in suspended particulate matter (SPM) and surface sediments of Hongfeng Lake were systematically investigated in this study. The results showed that the total organic carbon (TOC) to total phosphorus (TP) ratios (TOC/P) were obviously lower in SPM than in surface sediments, which demonstrated the preferential regeneration of P relative to C in lake system for the first time. Possible mechanisms for such include reductive dissolution of Fe oxyhydroxide and poly-P remineralization under hypoxic/anoxic conditions. Based on the difference in the TOC/P ratios between SPM and surface sediments, about 25.1 t P was estimated to be released annually from settling seston and sediments in Hongfeng Lake, which is much higher than the previous results on the P release flux from sediment. This indicates that a significant percentage of P may be regenerated during particulate matter transport in the water column, providing new insight into the P regeneration in lake system. The preferential regeneration of P may result in a positive feedback loop among bottom water anoxia, enhanced P regeneration, and algal bloom in sub-deep lakes. |
Keyword | Pregeneration Toc/p Ratio Suspended Particulate Matter Sediment Hongfeng Lake |
Indexed By | SCI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/10225 |
Collection | 环境地球化学国家重点实验室 |
Affiliation | 1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, PR China 2.University of Chinese Academy of Sciences, Beijing, 100049, PR China |
Recommended Citation GB/T 7714 | Jingan Chen;Yan Zeng;Jia Yu;Jingfu Wang;Haiquan Yang;Yaoting Lu. Preferential regeneration of P relative to C in a freshwater lake[J]. Chemosphere,2019,222:15-21. |
APA | Jingan Chen;Yan Zeng;Jia Yu;Jingfu Wang;Haiquan Yang;Yaoting Lu.(2019).Preferential regeneration of P relative to C in a freshwater lake.Chemosphere,222,15-21. |
MLA | Jingan Chen;Yan Zeng;Jia Yu;Jingfu Wang;Haiquan Yang;Yaoting Lu."Preferential regeneration of P relative to C in a freshwater lake".Chemosphere 222(2019):15-21. |
Files in This Item: | Download All | |||||
File Name/Size | DocType | Version | Access | License | ||
Preferential regener(477KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment