Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay

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	Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay
	Wang, Lan 1,2; Cai, Qinghua 1; Xu, Yaoyang 1,2; Kong, Linghui 1,2; Tan, Lu 1,2; Zhang, Min 1,2
刊名	AQUATIC ECOLOGY
	2011-05-01
卷号	45 期号:2 页码:197-212
关键词	Water level fluctuations Functional groups Phytoplankton dynamics Redundancy analysis Three Gorges Reservoir Xiangxi Bay
ISSN号	1386-2588
通讯作者	Cai, QH, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China ; qhcai@ihb.ac.cn
中文摘要	In reservoirs, water level fluctuations strongly influence phytoplankton development. However, studies on the response of phytoplankton in the reservoir-bay to water level fluctuations are very scarce, especially in the highly dynamic reservoir system, for instance, the Three Gorges Reservoir (TGR) on the Yangtze River in China. Therefore, we carried out weekly monitoring in a typical tributary bay-Xiangxi Bay of the TGR from March 2008 to March 2009, to analyze the dynamics of phytoplankton functional groups, as well as their response to the water level fluctuations and other environmental conditions. The phytoplankton functional groups G (short, nutrient-rich water columns with high light and without nutrient deficiency), M (dielly mixed layers of small eutrophic, low latitude with high insolation and without flushing and low total light) and Lo (summer epilimnia in mesotrophic lakes with segregated nutrients and without prolonged or deep mixing) were the most important in biomass, mainly represented by Pandorina morum and Eudorina elegans, Microcystis aeruginosa, Peridiniopsis niei and Ceratium hirundinella, respectively. The dominant functional groups had close relationships with the water level fluctuations, light and nutrient, etc. Principal components analysis and redundancy analysis indicated that phytoplankton functional groups in Xiangxi Bay were restricted by the mixing regime and other abiotic variables under the influences of the mixing regime. In Xiangxi Bay, the water level fluctuation showed significant correlations with many physicochemical variables, including the mixing depth (r = 0.97, p < 0.001) and the relative water column stability (r = -0.80, p < 0.001). The study implied that water level fluctuations had complex influence on environmental changes and selecting for phytoplankton functional groups in a highly dynamic reservoir-bay. The important characteristics of the dominant phytoplankton functional groups in Xiangxi Bay were also discussed.
英文摘要	In reservoirs, water level fluctuations strongly influence phytoplankton development. However, studies on the response of phytoplankton in the reservoir-bay to water level fluctuations are very scarce, especially in the highly dynamic reservoir system, for instance, the Three Gorges Reservoir (TGR) on the Yangtze River in China. Therefore, we carried out weekly monitoring in a typical tributary bay-Xiangxi Bay of the TGR from March 2008 to March 2009, to analyze the dynamics of phytoplankton functional groups, as well as their response to the water level fluctuations and other environmental conditions. The phytoplankton functional groups G (short, nutrient-rich water columns with high light and without nutrient deficiency), M (dielly mixed layers of small eutrophic, low latitude with high insolation and without flushing and low total light) and Lo (summer epilimnia in mesotrophic lakes with segregated nutrients and without prolonged or deep mixing) were the most important in biomass, mainly represented by Pandorina morum and Eudorina elegans, Microcystis aeruginosa, Peridiniopsis niei and Ceratium hirundinella, respectively. The dominant functional groups had close relationships with the water level fluctuations, light and nutrient, etc. Principal components analysis and redundancy analysis indicated that phytoplankton functional groups in Xiangxi Bay were restricted by the mixing regime and other abiotic variables under the influences of the mixing regime. In Xiangxi Bay, the water level fluctuation showed significant correlations with many physicochemical variables, including the mixing depth (r = 0.97, p < 0.001) and the relative water column stability (r = -0.80, p < 0.001). The study implied that water level fluctuations had complex influence on environmental changes and selecting for phytoplankton functional groups in a highly dynamic reservoir-bay. The important characteristics of the dominant phytoplankton functional groups in Xiangxi Bay were also discussed.
学科主题	Ecology; Limnology; Marine & Freshwater Biology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Ecology ; Limnology ; Marine & Freshwater Biology
研究领域[WOS]	Environmental Sciences & Ecology ; Marine & Freshwater Biology
关键词[WOS]	STEADY-STATE ASSEMBLAGES ; DIFFERENT TROPHIC STATE ; GARCAS POND ; TEMPORAL VARIATION ; GORGES RESERVOIR ; FLOODPLAIN LAKE ; PARANA RIVER ; SAO-PAULO ; BRAZIL ; CHINA
收录类别	SCI
资助信息	CAS [KZCX2-YW-427]; National Natural Science Foundation of China [40671197]; Hubei Key Laboratory of Wetland Evolution & Ecological Restoration
语种	英语
WOS记录号	WOS:000289300200004
公开日期	2011-06-29
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/15590]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lan,Cai, Qinghua,Xu, Yaoyang,et al. Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay[J]. AQUATIC ECOLOGY,2011,45(2):197-212.
APA	Wang, Lan,Cai, Qinghua,Xu, Yaoyang,Kong, Linghui,Tan, Lu,&Zhang, Min.(2011).Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay.AQUATIC ECOLOGY,45(2),197-212.
MLA	Wang, Lan,et al."Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay".AQUATIC ECOLOGY 45.2(2011):197-212.