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题名: SPATIO-TEMPORAL PATTERNS OF DIATOM COMMUNITIES IN FRONT OF THE THREE GORGES DAM: EVIDENCE OF THE EFFECTS OF HYDRODYNAMICS
作者: Zhou, Bei1, 2; Hu, Jianlin1, 2; Chen, Lei3; Yuan, Yijun1, 2; Xia, Chunxiang1; Yang, Xia3; Hu, Zhengyu1; Bi, Yonghong1
关键词: Diatom community ; spatio-temporal patterns ; Three Gorges Dam ; hydrodynamics ; flow ; velocity
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2015
卷: 24, 期:8A, 页:2593-2602
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: The Three Gorges Reservoir (TGR) has a peculiar hydrological regime in China, with water level fluctuations of 30 m annually. In order to investigate the effects of hydrodynamic conditions on the diatom communities, limnological investigations were conducted monthly in front of the Three Gorges Dam (TGD) in 2013. We identified 18 diatom genera from two classes. The spatio-temporal patterns of diatoms showed an apparent heterogeneity. During the flood season (May October), high flows, high velocity, low water level, and high turbidity in the main stream indicated strong mixing and made Melosira sp. the dominant species, while the lower velocity in the bay near the TGD indicated weak mixing and made Cyclotella sp., Melosira sp., and Synedra sp. the dominant species. Meanwhile, the strong mixing and high turbidity resulted in a low diatom abundance. During the dry season (the other months), the water level was stable, water flow and velocity were low in both the bay and the main stream, which led to weak mixing and low turbidity, and Cyclotella sp. dominated in the front region of the TGD. Spring was the transitional season and water level decreased gradually, but in spite of the weak mixing and low turbidity conditions, the diatom abundance increased along with the increase of water temperature and water flow. It could be concluded that the spatio-temporal heterogeneity determined by hydrodynamics was a characteristic of the diatom communities' dynamics in front of the TGD.
关键词[WOS]: PHYTOPLANKTON FUNCTIONAL-GROUPS ; NUTRIENT LIMITATION ; REGULATED RIVER ; WATER-QUALITY ; SOUTH-KOREA ; RESERVOIR ; BLOOMS ; REGIME ; CHINA ; STATE
语种: 英语
项目资助者: Science and Technology Research Project of China Three Gorges Corporation(CT-12-08-01 ; 0704098)
WOS记录号: WOS:000363072100005
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/342005/27339
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Three Gorges Complex Adm Bur, China Three Gorges Cooperat, Yichang 443133, Peoples R China
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