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学科主题: Geosciences, Multidisciplinary
题名: Spatiotemporal variations of internal P-loading and the related mechanisms in the large shallow Lake Chaohu
作者: Zhang Min; Xie Ping; Xu Jun; Liu Bingqin; Yang Hong
通讯作者: Xie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
关键词: eutrophication ; water column ; sediment ; phosphorus ; species ; sorption and release ; Lake Chaohu ; cyanobacterial blooms
刊名: SCIENCE IN CHINA SERIES D-EARTH SCIENCES
发表日期: 2006-04-01
DOI: 10.1007/s11430-006-8107-7
卷: 49, 页:72-81
收录类别: SCI
文章类型: Article
部门归属: Chinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Geosciences, Multidisciplinary
研究领域[WOS]: Geology
摘要: 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.
英文摘要: 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.
关键词[WOS]: PHOSPHORUS SORPTION CHARACTERISTICS ; SUBTROPICAL CHINESE LAKE ; MARINE-SEDIMENTS ; ORTHO-PHOSPHATE ; RELEASE ; WATER ; BLOOMS ; FORMS ; IRON ; ESTUARINE
语种: 英语
WOS记录号: WOS:000238958400007
ISSN号: 1006-9313
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8914
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Donghu Ecosyst Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

Recommended Citation:
Zhang Min; Xie Ping; Xu Jun; Liu Bingqin; Yang Hong.Spatiotemporal variations of internal P-loading and the related mechanisms in the large shallow Lake Chaohu,SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49():72-81
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