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学科主题: Geosciences, Multidisciplinary
题名: Contributions of phosphatase and microbial activity to internal phosphorus loading and their relation to lake eutrophication
作者: Song Chunlei; Cao Xiuyun; Li Jianqiu; Li Qingman; Chen Guoyuan; Zhou Yiyong
通讯作者: Zhou, YY, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
关键词: dissolved phosphatase ; reverse micelle ; internal loading ; phosphorus form of sediment ; microbiology ; eutrophication ; Microcystis bloom
刊名: SCIENCE IN CHINA SERIES D-EARTH SCIENCES
发表日期: 2006-04-01
DOI: 10.1007/s11430-006-8110-z
卷: 49, 页:102-113
收录类别: SCI
文章类型: Article
部门归属: Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Geosciences, Multidisciplinary
研究领域[WOS]: Geology
摘要: Phosphatase may accelerate the process of lake eutrophication through improving phosphorus bioavailability. This mechanism was studied in three Chinese eutrophic shallow lakes (Lake Taihu, Lake Longyang,and Lake Lianhua). Phosphatase activity was related to the concentration of soluble reactive phosphorus (SRP) and chlorophyll a. Stability of dissolved phosphatase in reverse micelles may be attributed to molecular size, conformation and active residues of the enzyme. At the site with Microcystis bloomed in Lake Taihu, dissolved phosphatase activity was higher and more stable in micelles, SRP concentrations were lower in interstitial water, the contents of different forms of phosphorus and the amounts of aerobic bacteria were lower while respiration efficiency was higher in sediments. Phosphobacteria, both inorganic and organic and other microorganisms were abundant in surface water but rare in sediments. Therefore, internal phosphorus may substantially flux into water column by enzymatic hydrolysis and anaerobic release, together with mobility of bacteria, thereby initiating the bloom. In short, biological mechanism may act in concert with physical and chemical factors to drive the internal phosphorus release and accelerate lake eutrophication.
英文摘要: Phosphatase may accelerate the process of lake eutrophication through improving phosphorus bioavailability. This mechanism was studied in three Chinese eutrophic shallow lakes (Lake Taihu, Lake Longyang,and Lake Lianhua). Phosphatase activity was related to the concentration of soluble reactive phosphorus (SRP) and chlorophyll a. Stability of dissolved phosphatase in reverse micelles may be attributed to molecular size, conformation and active residues of the enzyme. At the site with Microcystis bloomed in Lake Taihu, dissolved phosphatase activity was higher and more stable in micelles, SRP concentrations were lower in interstitial water, the contents of different forms of phosphorus and the amounts of aerobic bacteria were lower while respiration efficiency was higher in sediments. Phosphobacteria, both inorganic and organic and other microorganisms were abundant in surface water but rare in sediments. Therefore, internal phosphorus may substantially flux into water column by enzymatic hydrolysis and anaerobic release, together with mobility of bacteria, thereby initiating the bloom. In short, biological mechanism may act in concert with physical and chemical factors to drive the internal phosphorus release and accelerate lake eutrophication.
关键词[WOS]: ALKALINE-PHOSPHATASE ; REVERSE MICELLES ; SIZE-FRACTIONATION ; ORGANIC-SOLVENTS ; P-RELEASE ; WATER ; SEDIMENTS ; ENZYMES ; PHYTOPLANKTON ; AVAILABILITY
语种: 英语
WOS记录号: WOS:000238958400010
ISSN号: 1006-9313
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8916
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, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Song Chunlei; Cao Xiuyun; Li Jianqiu; Li Qingman; Chen Guoyuan; Zhou Yiyong.Contributions of phosphatase and microbial activity to internal phosphorus loading and their relation to lake eutrophication,SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49():102-113
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