Qi Feng, Ma Yan-wu, Xie Chun-gang, Chen Peng, Chen Mu-xia
Ying Yong Sheng Tai Xue Bao. 2015 Nov;26(11):3516-22.
Cladocera of 17 sampling locations in Bosten Lake were investigated 11 times from 2010 to 2013. Their community structure and succession dynamics were elaborated, and their responses to environment factors were analyzed. The results showed that a total of 14 species were identified and 3 of them were the dominant species. Compared with history data, species preferring oligotrophic conditions were decreasing or even disappeared, and species preferring eutrophic conditions had occupied the dominant position gradually. Spatial and temporal distribution of Cladocera densities changed greatly. Densities of the 17 sampling locations varied from 0-567.0 ind · L(-1) with an average of 30.0 ind · L(-1). Annual density of 2011 was the highest (82.5 ind · L(-1)), and then decreased year by year. Horizontal distribution of Cladocera showed a significant difference, and it was higher in shallow water area along the coast than in deep water area in the center. Temperature was the main ecological factor affecting the Cladocera community. Species distribution changed with water depth, and Daphnia longispina was common in the deep water while Bosmina longirostris was common in shallow water. Food limitation and fish predation might be the important reason that caused the variation of community structure.
2010年至2013年期间，对博斯腾湖17个采样点的枝角类动物进行了11次调查。阐述了它们的群落结构和演替动态，并分析了它们对环境因子的响应。结果表明，共鉴定出14个物种，其中3个为优势种。与历史数据相比，偏好贫营养条件的物种数量在减少甚至消失，而偏好富营养条件的物种逐渐占据主导地位。枝角类动物密度的时空分布变化很大。17个采样点的密度在0 - 567.0 ind·L(-1)之间变化，平均为30.0 ind·L(-1)。2011年的年密度最高(82.5 ind·L(-1))，随后逐年下降。枝角类动物的水平分布存在显著差异，沿岸浅水区的密度高于湖心深水区。温度是影响枝角类动物群落的主要生态因子。物种分布随水深而变化，长刺溞在深水区较为常见，而长额象鼻溞在浅水区较为常见。食物限制和鱼类捕食可能是导致群落结构变化的重要原因。
