Abstract

The structure of zooplankton communities in the Terek–Caspian coastal region of the Caspian Sea under the conditions of flow regulation of the Terek River and its passage through the Uch–Kosinsky channel are studied. Hydrobiological material collected in the waters of the Terek coastal region of the Caspian Sea was used. Long-term data are given for the zooplankton distribution in the studied region, which reflects the nature of the influence of the sea-level regime, the arid climate, the mass development of the Azov–Black Sea invader Acartia tonsa (Dana, 1849), and the trophic pressure of another invasive species, Mnemiopsis leidyi (A. Agassiz), after the passage Terek River runoff in a new channel. The influence of these factors mainly affected the autochthonous fauna of the waters of the Terek coast. It was shown that the previously leading native species, Calanipeda aquae dulcis and Eurytemora grimmi, faded into the background for a long period. It is only in recent years that C. a. dulcis became a subdominant form in the zooplankton of the studied water area of the Caspian Sea due to a decrease in the pressure of the ctenophore Mnemiopsis leidyi.

中文翻译：

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捷列克—里海沿岸地区的水生生物学研究

摘要

研究了捷列克河流量调节及其通过乌奇-科辛斯基河道的条件下里海沿德立-里海沿岸浮游动物群落的结构。使用了在里海Terek沿海地区水域中收集的水生生物材料。给出了研究区域浮游动物分布的长期数据，反映了海平面，干旱气候，亚速海-黑海侵略者A螨的大规模发展的影响性质（达娜，1849年） ，以及另一种入侵物种Mnemiopsis leidyi（A. Agassiz）的营养压力，它们在新通道中通过捷列克河径流之后。这些因素的影响主要影响捷列克海岸水域的土生动物。结果表明，以前占主导地位的本地物种，ani兰（Calanipeda aquae dulcis）和Eurytemora grimmi，在很长一段时间内逐渐淡出了背景。C. a。只是在最近几年。由于里氏ten虫Mnemiopsis leidyi的压力降低，因此在里海浮游动物的浮游生物中，dulcis成为主要形式。