Abstract

The structure and dynamics of plankton communities in the coastal zone of the Curonian Lagoon of the Baltic Sea from January to December 2017–2021 has been studied. It was found that, at the coastal shallow littoral station surrounded by macrophytes, the species diversity was higher and the quantitative characteristics of phytoplankton and zooplankton were lower in all seasons and years of the study than at the deeper coastal station located behind the macrophyte belt. The exception was the period when, as a result of surge events, the phytoplankton biomass in the coastal littoral in October–November 2018 increased to 326–627 g/m³. Every year, Cyanobacteria “blooms” with different intensities and durations were observed at the Lagoon. The abundance of cells of potentially toxic Сyanobacteria exceeded the World Health Organization standard, as a rule, in summer months at a deepwater coastal station, especially in 2017–2018. This had a negative impact on the state of the entire ecosystem, primarily on zooplankton organisms, in which communities the proportion of dead individuals increased. Water during the period of Cyanobacterial blooms in summer and autumn 2017–2018 also had an acute toxic effect on planktonic test organisms.

中文翻译：

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2017-2021年蓝藻水华时期波罗的海库尔斯泻湖沿岸地区浮游生物群落结构与动态

摘要

研究了2017年1月至2021年12月波罗的海库尔斯泻湖沿岸地区浮游生物群落的结构和动态。研究发现，在研究的各个季节和年份中，被大型植物包围的沿海浅水站的物种多样性较高，浮游植物和浮游动物的数量特征低于位于大型植物带后方的较深的沿海站。例外的是，由于激增事件，2018年10月至11月沿海浮游植物生物量增加至326-627 g/m ³。每年，蓝藻都会在泻湖中以不同的强度和持续时间“绽放”。通常，在夏季，深水沿海站的潜在有毒蓝藻细胞丰度超过了世界卫生组织的标准，特别是在 2017 年至 2018 年。这对整个生态系统的状态产生了负面影响，主要是对浮游动物生物体，其中群落中死亡个体的比例增加。2017-2018年夏秋蓝藻大量繁殖期间的水体也对浮游试验生物产生急性毒性作用。