The article describes quantitative and structural characteristics of zooplankton of polytypic sites of a water system including a lake, canal, and a water reservoir. It is shown that in the littoral zone of lakes and water reservoirs, the number of species and communities is higher, and biomass, lower. However, in the littoral zone of shallow lake zooplankton in number, took priority due to Rotifera, in the deep part of the water body – Rotifera and Cladocera; in the center of the lake zooplankton dominated by biomass due to Cladocera and Copepoda, in the water reservoir—due to the Copepoda. The dam area of the water reservoir had the highest species richness of zooplankton among all studied sites. The greatest number and biomass of zooplankton within a waterbody are noted in upper part, where a sedimentation zone had formed, and as a whole for the system of the investigated waterbodies, the maximum quantity indices are typical of lake communities. It is revealed that the starkest interannual changes in zooplankton were observed in the shallow lake: the number of species decreased—in the littoral zone at the expense of Rotifera, and in the center, the biomass increased at the expense of Cladocera; in deep-water area of the dam area of the reservoir, conversely, the number of species, as well as the number and biomass of the community, increased due to Copepoda.

中文翻译：

---

都尔根河流域及邻近水体浮游动物的分布和年际变化（蒙古西部）

该文章描述了包括湖泊，运河和蓄水池在内的水系统多型浮游动物的数量和结构特征。结果表明，在湖泊和水库的沿海区域，物种和群落的数量更多，而生物量则更低。然而，在浅水区浮游动物的沿海地区，由于轮虫在水体的深处-轮虫和克拉多拉的数量上居多。由于C足类动物，在水库中浮游动物的中心位于克拉克德拉和Co足类动物的生物量中。在所有研究地点中，水库坝区浮游动物的物种丰富度最高。在水体中，浮游动物的最大数量和最大生物量在上部形成了沉积区，总体而言，对于所调查的水体系统，最大数量指数是典型的湖泊群落。结果表明，在浅湖中，浮游动物的年际变化最明显：物种数量减少了，在沿海地区以轮虫为代价，而在中部，生物量却以克拉多菌为代价增加了；相反，在水库坝区深水区，由于Co足类，物种的数量以及群落的数量和生物量都增加了。生物量的增加以克拉德克拉为代价；相反，在水库坝区深水区，由于Co足类，物种的数量以及群落的数量和生物量都增加了。生物量的增加以克拉德克拉为代价；相反，在水库坝区深水区，由于Co足类，物种的数量以及群落的数量和生物量都增加了。