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学科主题: Marine & Freshwater Biology
题名: Daily and vertical dynamics of rotifers under the impact of diatom blooms in the Three Gorges Reservoir, China
作者: Zhou, Shuchan ; Cai, Qinghua ; Xu, Yaoyang ; Han, Xinqin
通讯作者: Cai, QH (reprint author), Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China ; qhcai@ihb.ac.cn
关键词: Rotifers ; Short-term dynamic ; Vertical distribution ; Diatom bloom ; The Three Gorges Reservoir ; The Xiangxi Bay
刊名: HYDROBIOLOGIA
发表日期: 2011
卷: 675, 期:1, 页:29-40
收录类别: SCI
部门归属: [Zhou, SC; Cai, QH; Xu, YY; Han, XQ] Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
资助者: CAS[KSCX2-YW-427]; National Natural Science Foundation of China[30330140, 40671197]; Major S&T Special Project of Water Pollution Control and Management[2008ZX07526-002-07]
摘要: The Three Gorges Dam was built in 2005 with a storage capacity of 39.3 billion m(3), ranking 22nd in the world. However, since the impoundment of the reservoir, serious blooms of phytoplankton have occurred. Rotifers, having a key role in the freshwater aquatic food web, are important grazers of phytoplankton and an essential food resource to higher trophic consumers. To explore the impacts of phytoplankton blooms on the rotifer community, daily and vertical surveys of rotifers were conducted in a bay of the Three Gorges Reservoir (Xiangxi Bay). Altogether 46 rotifer species were registered, and Synchaeta tremula, Polyarthra vulgaris, and Brachionus calyciflorus were the most abundant species accounting for 36, 26, and 16% of the mean rotifer densities, respectively. Although these dominant species always prevailed in the rotifer community, their proportions changed significantly from non-bloom phase to bloom phase, e.g., the significance of S. tremula deceased from 46.8 to 33.2%, while P. vulgaris and B. calyciflorus increased from 23.9 and 13.9% to 26.2 and 16.2%, respectively. In the vertical water column, all the rotifer following phytoplankton displayed an aggregated distribution, concentrating at the upper layers (0.5-5 m), especially during the bloom phase. From the non-bloom phase to the bloom phase, rotifer densities, the dominant rotifers, Shannon-Wiener and Margalef's diversity increased significantly, while the evenness displayed the opposite trend. Non-metric multidimensional scaling analysis (NMDS) revealed that the samples in the non-bloom phase were well separated from those in the bloom phase. This means that the outbreak of the diatom bloom in the Xiangxi Bay had significant impacts on the rotifer community. Further investigations are needed to address the impacts of the changes of rotifer community on higher trophic levels.
语种: 英语
WOS记录号: WOS:000293643700004
ISSN号: 0018-8158
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16267
Appears in Collections:淡水生态学研究中心_期刊论文

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Recommended Citation:
Zhou, Shuchan; Cai, Qinghua; Xu, Yaoyang; Han, Xinqin.Daily and vertical dynamics of rotifers under the impact of diatom blooms in the Three Gorges Reservoir, China,HYDROBIOLOGIA,2011,675(1):29-40
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