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tidal water exchanges can shape the phytoplankton community structure and reduce the risk of harmful cyanobacterial blooms in a semi-closed lake

引用

Journal of Oceanology and Limnology 2022年第5期40卷 1868-1880页

作者： Wenxu ZHENG Renhui LI Wenli QIN Binbin CHEN Min WANG Wanchun GUAN Xiaoling ZHANG Qiao YANG Min ZHAO Zengling MA Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou UniversityWenzhou 325035China National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution Wenzhou UniversityWenzhou 325035China Department of Marine Biotechnology School of Laboratory Medicine and Life ScienceWenzhou Medical UniversityWenzhou 325035China Marine Science and Technology College Zhejiang Ocean UniversityZhoushan 316022China School of Petrochemical Engineering and Environment Zhejiang Ocean UniversityZhoushan 316022China

For estuaries,inland lakes play a vital role in the ecological balance under the impact of tide *** effect of tides-induced water exchange on phytoplankton community in a semi-closed lake was studied and compared with that of an adjacent closed lake in the Oujiang River mouth in Zhejiang,East China Sea,from June 29,2020 to June 14,*** show that the dominant species,abundance,dominance,and diversity of the phytoplankton species between the two lakes were significantly *** the closed lake,cyanobacteria were the dominant species during the study *** the semi-closed lake,the diversification of the dominant species was greater,and some species of diatoms and green algae became *** average phytoplankton abundance in the closed lake was 6 times of that in the semi-closed *** average dominance of cyanobacteria in the closed lake was 0.96,and those in the semi-closed lake and the Oujiang River were 0.51 and 0.22,*** blooms occurred throughout the study time in the closed lake but not in the semi-closed ***,the species diversity richness of the phytoplankton in the semi-closed lake was higher than that of the closed one,and the phytoplankton community between the closed lake and semi-closed lake could be divided into distinctly different groups based on non-metic multidimensional scaling analysis(NMDS)and analysis of similarities(ANOSIM)*** salinity of the water was significantly greater and the transparency significantly smaller in the semi-closed lake than those in the closed ***,water exchange driven by local tidal movement increased salinity and decreased transparency of water,which consequently shaped the community structures of different phytoplankton and reduced the risk of a cyanobacterial bloom outbreak in the semi-closed lake.

关键词： estuary harmful cyanobacterial blooms phytoplankton community water exchange tidal movement environmental parameters

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