摘要
三峡水库蓄水前后,作者从2002年6月至2004年7月按月在坝前段(茅坪—归州)采集枝角类,研究蓄水前后枝角类的变化,结果显示蓄水前该江段水流急不适合枝角类栖息,仅在水流相对较缓的岸边采集到2种;蓄水后水环境较适宜枝角类生活,周年内共采集到20种,并存在着明显的季节变化和水平分布上的差异,文中对其原因进行了分析讨论。
The Three Gorges Reservoir was filled at 1 Jun. ,2003. The water level of the reservoir rose up to 135m. The lotic river ecosystem evolved into relative lentic reservoir ceosystem before the dam. The community composition of aquatic life changed with the environmental variation. We sampled the cladocerans at 5 sites from Maoping to Guizhou every month during June,2003 to July, 2004. There only 2 species were sampled before impoundment at the 5 sites in the reservoir. This result showed the lotic ecosystem didn＇t suit for inhabit for cladocerans. There 20 species were sampled after impoundment at the 5 sites in the reservoir during the first year. The reservoir ecosystem supplied habitat for the water flea. The cladoceran composition changed with season and distribution after impoundment in the reservoir. The species except Bosmina coregoni and B .fatalis varied with season and showed different in composition. The species enriched at the first month （June, 2003）after impoundment and in the spring （April, 2004）. Six species （D. brachyurum, Daphnia cucullata , Bosmina coregoni , B. fatalis , Bosminopsis deitersi and Aloha guttata ） distributed in five sampling sites. The others species distributed in part sampling sites.
出处
《水生生物学报》
CAS
CSCD
北大核心
2006年第1期58-63,共6页
Acta Hydrobiologica Sinica
基金
中国科学院知识创新工程重要方向项目(KSCX2-SW-111)
国家自然科学基金重点项目(30330140)
国家重点基础研究发展规划(973)项目(2002CB412300)
淡水生态与生物技术国家重点实验室开放基金资助项目(2004FB03)资助
关键词
枝角类
种类组成
三峡水库
水库蓄水
Cladoceran
Species composition
Three Gorges Reservoir
Filling phase of reservoir
