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Spatiotemporal variations of internal P-loading and the related mechanisms in the large shallow Lake Chaohu
Zhang Min; Xie Ping; Xu Jun; Liu Bingqin; Yang Hong; Xie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2006-04-01
Source PublicationSCIENCE IN CHINA SERIES D-EARTH SCIENCES
ISSN1006-9313
Volume49Pages:72-81
AbstractSpatiotemporal variations of P species and adsorption behavior in water column, interstitial water, and sediments were investigated in the large shallow eutrophic Lake Chaohu. Orthophosphate (Ortho-P) and total phosphorus (TP) concentrations were significantly higher in the western part than in the eastern part of the lake, due to different nutrient inputs from the surrounding rivers. Moreover, particulate phosphorus (PP) concentration was in a similar spatial pattern to Ortho-P and TIP concentrations, and also showed significantly positive correlation with the biomass of Microcystis, indicating more uptake and store of phosphorus by Microcystis than by other algae. Increase of pH and intensive utilization of P by phytoplankton were the main factors promoting P (especially Fe-P) release from the sediment to interstitial water during the cyanobacterial blooms in Lake Chaohu. Spatial dynamics in TP concentration, P species and adsorption behavior of the sediment, coupled with the statistical analyses, suggested that the spatial heterogeneity of P contents in the sediment was influenced by various factors, e.g. human activities, soil geochemistry and mineral composition. In spite of similar TP contents in the sediments, increase in proportion of Fe-P concentration in the sediment may result in a high risk of P release.; Spatiotemporal variations of P species and adsorption behavior in water column, interstitial water, and sediments were investigated in the large shallow eutrophic Lake Chaohu. Orthophosphate (Ortho-P) and total phosphorus (TP) concentrations were significantly higher in the western part than in the eastern part of the lake, due to different nutrient inputs from the surrounding rivers. Moreover, particulate phosphorus (PP) concentration was in a similar spatial pattern to Ortho-P and TIP concentrations, and also showed significantly positive correlation with the biomass of Microcystis, indicating more uptake and store of phosphorus by Microcystis than by other algae. Increase of pH and intensive utilization of P by phytoplankton were the main factors promoting P (especially Fe-P) release from the sediment to interstitial water during the cyanobacterial blooms in Lake Chaohu. Spatial dynamics in TP concentration, P species and adsorption behavior of the sediment, coupled with the statistical analyses, suggested that the spatial heterogeneity of P contents in the sediment was influenced by various factors, e.g. human activities, soil geochemistry and mineral composition. In spite of similar TP contents in the sediments, increase in proportion of Fe-P concentration in the sediment may result in a high risk of P release.
SubtypeArticle
KeywordEutrophication Water Column Sediment Phosphorus Species Sorption And Release Lake Chaohu Cyanobacterial Blooms
DepartmentChinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Subject AreaGeosciences, Multidisciplinary
DOI10.1007/s11430-006-8107-7
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000238958400007
WOS KeywordPHOSPHORUS SORPTION CHARACTERISTICS ; SUBTROPICAL CHINESE LAKE ; MARINE-SEDIMENTS ; ORTHO-PHOSPHATE ; RELEASE ; WATER ; BLOOMS ; FORMS ; IRON ; ESTUARINE
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8914
Collection期刊论文
Corresponding AuthorXie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
AffiliationChinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Zhang Min,Xie Ping,Xu Jun,et al. Spatiotemporal variations of internal P-loading and the related mechanisms in the large shallow Lake Chaohu[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49:72-81.
APA Zhang Min,Xie Ping,Xu Jun,Liu Bingqin,Yang Hong,&Xie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.(2006).Spatiotemporal variations of internal P-loading and the related mechanisms in the large shallow Lake Chaohu.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49,72-81.
MLA Zhang Min,et al."Spatiotemporal variations of internal P-loading and the related mechanisms in the large shallow Lake Chaohu".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49(2006):72-81.
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