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学科主题: Environmental Sciences & Ecology
题名: DYNAMICS OF CHLOROPHYLL FLUORESCENCE AND ECO-MORPHOLOGICAL PROPERTIES OF Microcystis BLOOM IN MEILIANG BAY OF LAKE TAIHU, CHINA
作者: Wang, Zhicong1, 2; Zuo, Ming1, 2; Wang, Yingcai1, 2; Liu, Yongding1; Li, Dunhai1
通讯作者: Liu, YD ; Li, DH (reprint author), Chinese Acad Sci, Inst Hydrobiol, 7 S Donghu Rd, Wuhan 430072, Hubei Province, Peoples R China ; wangzhiconga@163.com ; lidh@ihb.ac.cn
关键词: chlorophyll fluorescence ; colony size ; floating velocity ; decline ; Microcystis bloom
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2011
卷: 20, 期:9, 页:2295-2305
收录类别: SCI
文章类型: Article
部门归属: [Wang, ZC; Zuo, M; Wang, YC; Liu, YD; Li, DH] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei Province, Peoples R China; [Wang, ZC; Zuo, M; Wang, YC] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Basic Research and Development Plan[2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation[2008ZX07103-004-01, 2009ZX07104-005-3]
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Eutrophication has become a serious concern in many lakes, resulting in cyanobacterial blooms. Some variations of physiological activity and eco-morphological property in Microcystis bloom, especially in field experiment, are currently less studied. This study aimed to describe what changes of physiological activity and eco-morphological property had happened, and identify what is the key factor resulting in the decline of Microcystis bloom. The chlorophyll fluorescence, buoyancy and colony sizes of Microcystis and variation of physico-chemical data in the Meiliang Bay estuary of Lake Taihu, China, was investigated everyday from July 18, 2009 to July 29, 2009. In field investigation, F(v)/F(m) Phi(PSII) and qP can regarded as effective indicators to evaluated physiological activity and the growth state of Microcystis bloom. We found on sunny days, photoinhibition occurred 2 hours later than that on cloudy days, but photodamage indicated by unrecoverable decreasing F(v)/F(m), was observed after exposure to high light for a long time. While on cloudy days, the photoinhibition of Microcystis seemly occurred more easily and recovered quickly at weak light. Controlling experiment showed that nutrient depletion could lead to decreased buoyancy, dis-aggregated colonies and dropping photosynthesis of Microcystis. Based on these results of high light, rich DO, a negative correlation between DO and F(v)/F(m), and a lagged photoinhibition on sunny days, we inferred Mehler's reaction was a protective mechanism of photosystem for a short time, but results in photodamage when exposure is long enough. In all, we conclude the long-term illumination of high light companied with nutrient depletion caused by rapid growth of Microcystis might be the main reasons for the bloom decline.
英文摘要: Eutrophication has become a serious concern in many lakes, resulting in cyanobacterial blooms. Some variations of physiological activity and eco-morphological property in Microcystis bloom, especially in field experiment, are currently less studied. This study aimed to describe what changes of physiological activity and eco-morphological property had happened, and identify what is the key factor resulting in the decline of Microcystis bloom. The chlorophyll fluorescence, buoyancy and colony sizes of Microcystis and variation of physico-chemical data in the Meiliang Bay estuary of Lake Taihu, China, was investigated everyday from July 18, 2009 to July 29, 2009. In field investigation, F(v)/F(m) Phi(PSII) and qP can regarded as effective indicators to evaluated physiological activity and the growth state of Microcystis bloom. We found on sunny days, photoinhibition occurred 2 hours later than that on cloudy days, but photodamage indicated by unrecoverable decreasing F(v)/F(m), was observed after exposure to high light for a long time. While on cloudy days, the photoinhibition of Microcystis seemly occurred more easily and recovered quickly at weak light. Controlling experiment showed that nutrient depletion could lead to decreased buoyancy, dis-aggregated colonies and dropping photosynthesis of Microcystis. Based on these results of high light, rich DO, a negative correlation between DO and F(v)/F(m), and a lagged photoinhibition on sunny days, we inferred Mehler's reaction was a protective mechanism of photosystem for a short time, but results in photodamage when exposure is long enough. In all, we conclude the long-term illumination of high light companied with nutrient depletion caused by rapid growth of Microcystis might be the main reasons for the bloom decline.
关键词[WOS]: WATER ; EUTROPHICATION ; STRESS ; DISSIPATION ; PHOSPHORUS ; SUCCESSION ; AERUGINOSA ; PARAMETERS ; SUMMER ; LEAVES
语种: 英语
WOS记录号: WOS:000294979300016
ISSN号: 1018-4619
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16343
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei Province, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Wang, Zhicong; Zuo, Ming; Wang, Yingcai; Liu, Yongding; Li, Dunhai.DYNAMICS OF CHLOROPHYLL FLUORESCENCE AND ECO-MORPHOLOGICAL PROPERTIES OF Microcystis BLOOM IN MEILIANG BAY OF LAKE TAIHU, CHINA,FRESENIUS ENVIRONMENTAL BULLETIN,2011,20(9):2295-2305
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