水生态学杂志2017，Vol.38Issue(3)：51-57,7.
新疆博斯腾湖轮虫群落季节动态及其影响因子
Rotifer Seasonal Dynamics and Driving Factors in Bosten Lake, Xinjiang
摘要
Abstract
Bosten Lake is the largest lake in the arid and semiarid region of China and plays a crucial role in the ecosystem of southern Xinjiang.Rotifers and environmental factors in Bosten Lake were investigated to explore the relationship between seasonal variation of the rotifer community and determinants from the inland arid zone.Rotifer community structure and succession dynamics were characterized and the effects of environmental variables on rotifer distribution and diversity index were explored using canonical correlation analysis.The objectives were to provide a reference for water quality evaluation and protection, and support the sustainable development of fishery resources in Bosten Lake.In May, August and October, 2010 and January, 2011, a field investigation was carried out across a network of 17 sampling stations that covered the lake.Water samples collected from the different water layers of each sampling station were collected for quantitative analysis of rotifers, phytoplankton, protozoa, cladocerans and copepoda.Rotifer samples were collected using a No.25 plankton net with mesh size of 64 m.Physiochemical parameters of the water body were measured in situ and samples were collected for laboratory analysis.A total of 41 rotifer species from 25 genera, representing 15 families were identified with eight dominant species observed through the four seasons.The most dominant species were found in summer, including Collotheca sp., Filinia longiseta, Pedalia mira and Polyarthra trigla, but only one dominant species (Keratella quadrata) occurred at low temperature in winter, while the dominant species was observed at all the sampling stations, displaying no spatial difference with season.Rotifer densities in Bosten Lake varied from 0.2 ind/L to 174.0 ind/L, with the average value of 25.5 ind/L, displaying significant temporal-spatial variations.The thriving stages of rotifers were in spring and summer and in shallow water area where the influence of anthropogenic activities is great.Rotifer densities decreased sharply during autumn and winter.The study indicates that the fluctuation of nutrition levels (31.15-46.28) had little effects on rotifer densities.Water temperature was the most important ecological factor influencing rotifer community, and the rotifer diversity index increased with the increase of water temperature.Rotifer species were sensitive to pH.Brachionus urceus dominated the community at higher pH condition, and Anuraeopsis fissa and Filinia lingiseta were the dominant species at lower pH condition.Additionally, the species richness of rotifers was also significantly related to the total organic carbon(P<0.05), and the diversity index increased as the total organic carbon increased.关键词
博斯腾湖/轮虫/季节变化/群落结构/影响因子Key words
Bosten Lake/rotifer/seasonal variation/community structure/driving factors分类
生物科学引用本文复制引用
祁峰,马燕武,李红,谢春刚,陈朋,陈牧霞..新疆博斯腾湖轮虫群落季节动态及其影响因子[J].水生态学杂志,2017,38(3):51-57,7.基金项目
公益性行业农业科研专项(201303056-8). （201303056-8）
