Seasonal variation and longitudinal distribution characters of cladocerans in the Three Gorges Reservoir

doi:10.3724/SP.J.1003.2009.09008

Abstract

Abstract:

To reveal patterns of longitudinal distribution, seasonal variation, and ecological succession in cladocerans communities in the Three Gorges Reservoir, ten sites were used to sample cladoceran communities across a longitudinal gradient from April, 2004 to January, 2005. Nine cladoceran species were collected throughout the year. Species richness was highest in spring (8 species), lower in summer (5 species) and winter (3 species), and lowest in autumn (2 species). Cladoceran species composition varied across sampling sites. Four species were collected from river sampling sites and seven species from reservoir sampling sites. Cladoceran species richness decreased gradually with increasing distance to the dam within the reservoir area. Cladoceran density and biomass varied among seasons (P <0.01) and sampling sites ( P <0.01), and both were highest in spring. Density and biomass of cladocerans in river areas were lower than in the reservoir area. Density and biomass of cladoceran in up area of reservoir was lower than that in down area of reservoir. The cladoceran communities of the Three Gorges Reservoir showed distinct patterns in both longitudinal distribution and seasonal variation.

Key words: cladoceran, zooplankton, community ecology, Yangtze River

Huixian Wu, Jianliang Yao, Yan Liu, Junzeng Xue, Qinghua Cai, Jiankang Liu. Seasonal variation and longitudinal distribution characters of cladocerans in the Three Gorges Reservoir[J]. Biodiv Sci, 2009, 17(5): 512-517.

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URL: https://www.biodiversity-science.net/EN/10.3724/SP.J.1003.2009.09008

https://www.biodiversity-science.net/EN/Y2009/V17/I5/512

Figures/Tables 4

References 23

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种类 Species	采样点 Sampling sites
种类 Species	江津 Jiangjin	重庆 Chongqing	木洞 Mudong	长寿 Changshou	涪陵 Fuling	万州 Wanzhou	巫山 Wushan	巴东 Badong	归州 Guizhou	茅坪 Maoping
短尾秀体溞Diaphanosoma brachyurum									夏季Summer	夏季Summer
僧帽溞 Daphnia cucullata	春季Spring	春季Spring		春季Spring	春季Spring			春季Spring		春季, 夏季 Spring, Summer,
透明溞 D. hyaline										春季, 夏季, 冬季Spring, Summer, Winter
老年低额溞 Simocephalus vetulus			春季Spring
多刺裸腹溞 Moina macrocopa			春季Spring
简弧象鼻溞 Bosmina coregoni	春季, 秋季Spring, Autumn	春季Spring	春季Spring	春季Spring	春季, 夏季Spring, Summer	春季, 秋季 Spring, Autumn	春季, 秋季 Spring, Autumn	春季, 秋季Spring, Autumn	春季, 夏季, 秋季Spring, Summer, Autumn	春春季, 夏季, 冬季Spring, Summer, Winter
脆弱象鼻溞 B. fatalis						春季Spring				春季Spring
颈沟基合溞 Bosminopsis deiteris					春季Spring	春季Spring	春季Spring	春季Spring	春季Spring	春季Spring
点滴尖额溞 Alona guttata					春季Spring		春季, 夏季, 秋季Spring, Summer, Autumn	春季Spring	冬季Winter	春季Spring

种类 Species	采样点 Sampling sites
种类 Species	江津 Jiangjin	重庆 Chongqing	木洞 Mudong	长寿 Changshou	涪陵 Fuling	万州 Wanzhou	巫山 Wushan	巴东 Badong	归州 Guizhou	茅坪 Maoping
短尾秀体溞Diaphanosoma brachyurum									夏季Summer	夏季Summer
僧帽溞 Daphnia cucullata	春季Spring	春季Spring		春季Spring	春季Spring			春季Spring		春季, 夏季 Spring, Summer,
透明溞 D. hyaline										春季, 夏季, 冬季Spring, Summer, Winter
老年低额溞 Simocephalus vetulus			春季Spring
多刺裸腹溞 Moina macrocopa			春季Spring
简弧象鼻溞 Bosmina coregoni	春季, 秋季Spring, Autumn	春季Spring	春季Spring	春季Spring	春季, 夏季Spring, Summer	春季, 秋季 Spring, Autumn	春季, 秋季 Spring, Autumn	春季, 秋季Spring, Autumn	春季, 夏季, 秋季Spring, Summer, Autumn	春春季, 夏季, 冬季Spring, Summer, Winter
脆弱象鼻溞 B. fatalis						春季Spring				春季Spring
颈沟基合溞 Bosminopsis deiteris					春季Spring	春季Spring	春季Spring	春季Spring	春季Spring	春季Spring
点滴尖额溞 Alona guttata					春季Spring		春季, 夏季, 秋季Spring, Summer, Autumn	春季Spring	冬季Winter	春季Spring