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学科主题: Marine & Freshwater Biology
题名: Long-term changes in crustacean zooplankton and water quality in a shallow, eutrophic Chinese lake densely stocked with fish
作者: Yang Yufeng ; Huang Xiangfei & Liu Jiankang
通讯作者: Yang, YF, Shantou Univ, Ctr Sci, Shantou 515063, Peoples R China
关键词: crustacean zooplankton ; long-term changes ; water quality ; fish ; Lake Donghu ; China
刊名: HYDROBIOLOGIA
发表日期: 1998
卷: 391, 期:1-3, 页:195-203
收录类别: SCI
部门归属: Shantou Univ, Ctr Sci, Shantou 515063, Peoples R China; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
摘要: From surveys made in 1962-1963, 1973-1974, 1979-1996 at two Stations in Lake Donghu, a shallow eutrophic water body near Wuhan, P. R. China, the authors, derive long-term changes in species composition, standing crop and body-size of planktonic crustaceans. The species number decreased from the 1960s to the 1990s. The cladocerans dropped from 46 (1960s) to 26 (1980s) to 13 (1990s); the copepods decreased from 14 (1960s) to 10 (1980s) to 7 (1990s). From the mid-1980s on, the dominant crustaceans also changed: Daphnia hyalina and D. carinata ssp. were replaced by Moina micrura and Diaphanosoma brachyurum at Stations 1 and 2, respectively; Cyclops vicinus replaced Mesocyclops leuckarti. Densities and biomass of Cladocera decreased markedly after 1987. Annual average densities and biomass of cladocerans were statistically differences between 1962-1986 and 1987-1996 (P < 0.01). Annual average densities of Daphnia (Station 1 + Station 2) were negatively correlated with fish yield. Since the 1980s, annual average body length of Cladocera and Calanoida decreased, while annual average body length of Cyclopoida increased. In the same years, average body length of copepods was lower during May-October than during January-April and November-December. A 12-yr data analysis showed annual average concentration of chlorophyll-a (Chl-a) to be negatively correlated with annual average density of Daphnia, whilst lake transparency was positively correlated with annual average densities of Daphnia. The results imply that, since Daphnia feeds efficiently on phytoplankton, it could decrease concentration of Chl-a, and enhance water transparency.
语种: 英语
WOS记录号: WOS:000081003200017
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/10188
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Recommended Citation:
Yang Yufeng; Huang Xiangfei & Liu Jiankang.Long-term changes in crustacean zooplankton and water quality in a shallow, eutrophic Chinese lake densely stocked with fish,HYDROBIOLOGIA,1998,391(1-3):195-203
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