Abstract

The species composition of water fleas (Crustacea: Cladocera) in the water bodies of the left bank of the Lena River near the city of Yakutsk and its vicinities has been studied. Local faunistic associations ty-pical of the region have been identified using a statistical approach based on the binomial distribution function. As a result, 68 taxa have been identified and 8 very distinct groups of taxa constituting the cores of local faunistic associations of the branchiopod crustaceans in different water bodies and/or various biotopes within a single water body have been separated. We have demonstrated that the water bodies of the Lena River valley and the watershed differ both in species composition and in associations of the Cladocera. At least one species association of Cladocera is confined to ponds under a visible anthropogenic load. Thus, not only species that are typical for urban water bodies, but also local faunistic associations whose presence in the city indicates a significant anthropogenic pressure, have been identified. Moreover, the identified clusters can be interpreted in terms of our knowledge on the individual species preferences for water bodies of different types and different ecological zones of a certain water body.

中文翻译：

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勒拿河左岸水体中的当地水蚤（甲壳类：枝角类）动物群落（俄罗斯雅库特）

摘要

对雅库茨克市及其周边地区勒拿河左岸水体中的水蚤（甲壳类：枝角类）的物种组成进行了研究。使用基于二项式分布函数的统计方法确定了该地区典型的当地动物群落。结果，已鉴定出 68 个类群，并分离出 8 个非常不同的类群，这些类群构成了不同水体和/或单个水体内的各种群落生境中的鳃足类甲壳动物当地动物群落的核心。我们已经证明勒拿河流域和流域的水体在物种组成和枝角类群落方面都有所不同。枝角类的至少一种物种群落仅限于可见人为负荷下的池塘。因此，不仅确定了城市水体的典型物种，而且还确定了当地的动物群落，它们在城市中的存在表明存在巨大的人为压力。此外，所识别的聚类可以根据我们对不同类型水体和特定水体不同生态区的个体物种偏好的知识来解释。