Department of Hydrobiology, University of Kazimierz Wielki in Bydgoszcz, 85-090 Bydgoszcz, Poland.
Department of Water Resources and Climatology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland.
Int J Environ Res Public Health. 2022 Mar 31;19(7):4131. doi: 10.3390/ijerph19074131.
This study aimed to compare concentrations of chlorophyll-a between individual phytoplankton groups for four shallow Baltic coastal lakes, varying in type of connection with the sea. For two years, the research focused on quantifying the effects of abiotic factors-concentrations of heavy metals (Ba, Bi, Cr, Cu, Mn, Fe, Ni, Pb, and Zn) and hydrological connectivity-on phytoplankton composition, biomass, and photosynthetic activity. Our results show that hydrological factors are the main predictors of phytoplankton structure. The lakes differed in salinity: freshwater vs. brackish vs. transitional lakes. Irrespective of lake type, the dominant group was that of Cyanobacteria (~80%), but their percentage contribution was lower in the brackish lake. Baltic seawater intrusion resulted in a decrease in heavy-metal concentrations in lake water for Fe, Zn, Pb, and Bi. Redundancy analysis (RDA) suggested positive effects of some heavy metals on the biomass of the Chlorophyta and Bacillariophyta. For the Cryptophyta only, a slight decrease in biomass was linked with increased metal concentrations in open water.
本研究旨在比较四个波罗的海浅海岸湖中不同类型与海洋连通的个体浮游植物群的叶绿素-a 浓度。研究持续了两年，重点定量研究了非生物因素（重金属浓度（钡、铋、铬、铜、锰、铁、镍、铅和锌）和水文连通性）对浮游植物组成、生物量和光合作用活性的影响。研究结果表明，水文因素是浮游植物结构的主要预测因子。这些湖泊在盐度上存在差异：淡水与半咸水与过渡性湖泊。无论湖泊类型如何，优势群体都是蓝藻（约 80%），但在半咸水湖中其占比更低。波罗的海海水入侵导致湖水中铁、锌、铅和铋的重金属浓度降低。冗余分析（RDA）表明，一些重金属对绿藻和硅藻的生物量有积极影响。仅对于隐藻而言，在开阔水域中，随着金属浓度的增加，生物量略有下降。
