The enrichment of the protected Borovoe Lake with nutrients has taken place within the last 100 years, from the moment the first resort was formed on its shores. The purpose of this study was to assess the current ecological state of Borovoe based on the structure of zooplankton. According to the chemical data, in the summer of 2019, the content of nutrients in the water was, relatively, not high; the content of heavy metals was very low. Twenty-seven species were found in zooplankton. The average abundance of zooplankton was 988.8 thousand ind./m3 with a biomass of 1.52 g/m3. Rotifera dominated. Cladocera sub-dominated. The Shannon index values were 2.31 bit/ind. and 2.57 bit/mg; the values of Clarke’s W-statistics and Δ-Shannon were negative. The abundance of zooplankton increased more than nine times, but the average individual mass of an organism decreased from 0.0112 to 0.0016 mg over the past decade. Despite the relatively low content of nutrients, the structure of zooplankton demonstrated that the nutritional load on Lake Borovoe is currently close to critical. Statistical mapping of the data and redundancy analysis (RDA) showed that the primary source of lake pollution is the village of Borovoe and sanatoriums located on the southeast and northwest coasts.

中文翻译：

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浮游动物作为受保护水生生态系统生态状态的指标（博罗沃湖，布拉拜国家自然公园，哈萨克斯坦北部）

从第一个度假村在湖边形成的那一刻起，在过去的 100 年里，受保护的博罗沃湖就发生了丰富的营养物质。本研究的目的是根据浮游动物的结构评估 Borovoe 当前的生态状态。化学数据显示，2019年夏季，水中营养成分含量相对不高；重金属含量非常低。在浮游动物中发现了 27 种。浮游动物平均丰度98.88万个/m3，生物量1.52g/m3。轮虫占主导地位。枝角亚目次要。香农指数值为 2.31 位/指数。和 2.57 位/毫克；Clarke's W-statistics 和 Δ-Shannon 的值为负。浮游动物的丰度增加了九倍多，但在过去十年中，生物体的平均个体质量从 0.0112 毫克减少到 0.0016 毫克。尽管营养物质含量相对较低，但浮游动物的结构表明，博罗沃湖的营养负荷目前已接近临界值。数据的统计映射和冗余分析（RDA）表明，湖泊污染的主要来源是位于东南和西北海岸的 Borovoe 村和疗养院。