Abstract

The features of the composition, development, and spatial distribution of the phytoplankton of highly mineralized karst Lake Klyuchik (Nizhny Novgorod oblast) are considered. The lake has a pronounced ecotone with respect to the hydrological and hydrochemical parameters. A unique algocenosis with a high quantitative development (the biomass is over 130 g/m³, which is unusual for middle-water bodies) and the dominance of centric diatom Cyclotella distinguenda Hustedt. (a rare species that is untypical for the water bodies of the Middle Volga) have been revealed in the western part of the lake and in the ecotone zone. The vertical phytoplankton distribution shows the bottom maximum in the ecotone zone and in the maximum depth area.

中文翻译：

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高度矿化的喀斯特湖浮游植物的组成，结构和分布

摘要

考虑了高度矿化的喀斯特湖（Klyuchik）（下诺夫哥罗德州）浮游植物的组成，发育和空间分布特征。该湖在水文和水化学参数方面具有明显的过渡带。具有高度定量发展的独特的藻类病（生物量超过130 g / m ³，这对于中等水域而言是不寻常的），并且以中心硅藻独轮铃Cyclutella distinguenda Hustedt为主导。在湖的西部和生态交错带发现了一种（对伏尔加河中部水体非典型的稀有物种）。浮游植物的垂直分布在过渡带和最大深度区域显示了底部最大值。