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学科主题: Environmental Sciences; Geosciences ; Multidisciplinary
题名: Seasonal Variations in Chlorophyll a Concentrations in Relation to Potentials of Sediment Phosphate Release by Different Mechanisms in a Large Chinese Shallow Eutrophic Lake (Lake Taihu)
作者: Song, Chunlei1; Cao, Xiuyun1; Liu, Yunbing1, 2; Zhou, Yiyong1
通讯作者: Zhou, YY, Chinese Acad Sci, Inst Hydrobiol, 7 Donghu S Rd, Wuhan 430072, Peoples R China
关键词: chlorophyll a ; inorganic phosphate-solubilizing bacteria ; iron-bound phosphate ; Lake Taihu ; organic phosphate-mineralizing bacteria
刊名: GEOMICROBIOLOGY JOURNAL
发表日期: 2009
DOI: 10.1080/01490450903061119
卷: 26, 期:7, 页:508-515
收录类别: SCI
文章类型: Article
部门归属: [Song, Chunlei; Cao, Xiuyun; Liu, Yunbing; Zhou, Yiyong] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Liu, Yunbing] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
资助者: National Science Foundation of China [40730528]; Chinese Academy of Sciences [(KZCX2-YW-426]; State Key Laboratory of Freshwater Ecology and Biotechnology [2008FB012]
类目[WOS]: Environmental Sciences ; Geosciences, Multidisciplinary
研究领域[WOS]: Environmental Sciences & Ecology ; Geology
摘要: The relationship between chlorophyll a and fractionation of sediment phosphorus, inorganic phosphate-solubilizing bacteria (IPB), and organic phosphate-mineralizing bacteria (OPB) was evaluated in a large Chinese shallow eutrophic lake (Lake Taihu) and its embayment (Wuli Bay). At the three study sites, the increase of chlorophyll a concentrations in April paralleled those of the iron bound phosphate accounting for major portion of sediment inorganic phosphate, and in June significantly higher OPB and IPB numbers (especially OPB) in sediment were main contributors to the peaks of chlorophyll a concentration. Even though IPB peaked from February to June, it should serve as an unimportant P source due to the irrelevancy with chlorophyll a and soluble reactive phosphorus (SRP). By contrast, at the other site in the embayment, the calcium-bound phosphate was predominant and solid, which was difficult to be released, and neither IPB nor OPB were detectable in the sediment, indicating weak potential for phosphorus release from the sediment, which was reflected in the small seasonal variation in SRP concentration in water column. Hence, the extents to which the three general mechanisms behind phosphate release from sediment (desorption of iron bound phosphate, solubilization by IPB and enzymatic hydrolysis by OPB) operated were different depending on seasons and sites in Lake Taihu, they may jointly drive phosphate release and accelerate the eutrophication processes.
英文摘要: The relationship between chlorophyll a and fractionation of sediment phosphorus, inorganic phosphate-solubilizing bacteria (IPB), and organic phosphate-mineralizing bacteria (OPB) was evaluated in a large Chinese shallow eutrophic lake (Lake Taihu) and its embayment (Wuli Bay). At the three study sites, the increase of chlorophyll a concentrations in April paralleled those of the iron bound phosphate accounting for major portion of sediment inorganic phosphate, and in June significantly higher OPB and IPB numbers (especially OPB) in sediment were main contributors to the peaks of chlorophyll a concentration. Even though IPB peaked from February to June, it should serve as an unimportant P source due to the irrelevancy with chlorophyll a and soluble reactive phosphorus (SRP). By contrast, at the other site in the embayment, the calcium-bound phosphate was predominant and solid, which was difficult to be released, and neither IPB nor OPB were detectable in the sediment, indicating weak potential for phosphorus release from the sediment, which was reflected in the small seasonal variation in SRP concentration in water column. Hence, the extents to which the three general mechanisms behind phosphate release from sediment (desorption of iron bound phosphate, solubilization by IPB and enzymatic hydrolysis by OPB) operated were different depending on seasons and sites in Lake Taihu, they may jointly drive phosphate release and accelerate the eutrophication processes.
关键词[WOS]: PHOSPHORUS ; NUTRIENT ; MICROORGANISMS
语种: 英语
WOS记录号: WOS:000269876500007
ISSN号: 0149-0451
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/7584
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; Liu, Yunbing; Zhou, Yiyong.Seasonal Variations in Chlorophyll a Concentrations in Relation to Potentials of Sediment Phosphate Release by Different Mechanisms in a Large Chinese Shallow Eutrophic Lake (Lake Taihu),GEOMICROBIOLOGY JOURNAL,2009,26(7):508-515
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