Distribution and controlling factors of phytoplankton assemblages associated with mariculture in an eutrophic enclosed bay in the East China Sea  

作　　者：HUO Yuanzi WEI Zhangliang LIU Qiao YANG Fangfang LONG Lijuan ZHANG Qi BI Hongsheng HE Qing HE Peimin 

机构地区：[1]College of Marine Ecology and Environment, Shanghai Ocean University [2]Maine Scientific Research Institute, Shanghai Ocean University [3]Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences [4]Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science

出　　处：《Acta Oceanologica Sinica》2018年第8期102-112,共11页海洋学报（英文版）

基　　金：The Public Science and Technology Research Funds Projects of Ocean under contract No.201205009-5;the Key Projects in the National Science and Technology Pillar Program under contract No.2012BAC07B03;the Shanghai Universities Firstclass Disciplines Project(Discipline name:Marine Science(0707));the Plateau Peak Disciplines Project of Shanghai Universities(Marine Science 0707)

摘　　要：The distribution of phytoplankton and its correlation with environmental factors were studied monthly during August 2012 to July 2013 in the Yantian Bay. A total of 147 taxa of phytoplankton were identified, and the average abundance was in the range of 0.57×10~4 to 7.73×10~4 cell/L. A total of 19 species dominated the phytoplankton assemblages, and several species that are widely reported to be responsible for microalgae blooms were the absolutely dominant species, such as Skeletonema costatum, Navicula sp., Thalassionema nitzschioides,Pleurosigma sp., and Licmophora abbreviata. The monthly variabilities in phytoplankton abundance could be explained by water temperature, dissolved oxygen, salinity, dissolved inorganic nitrogen（DIN）, and suspended solids. The results of a redundancy analysis showed that p H and nutrients, including DIN and silicate（SiO_4）, were the most important environmental factors controlling phytoplankton assemblages in specific months. It was found that nutrients and pH levels that were mainly influenced by mariculture played a vital role in influencing the variation of phytoplankton assemblages in the Yantian Bay. Thus, a reduction of mariculture activities would be an effective way to control microalgae blooms in an enclosed and intensively eutrophic bay.The distribution of phytoplankton and its correlation with environmental factors were studied monthly during August 2012 to July 2013 in the Yantian Bay. A total of 147 taxa of phytoplankton were identified, and the average abundance was in the range of 0.57×10~4 to 7.73×10~4 cell/L. A total of 19 species dominated the phytoplankton assemblages, and several species that are widely reported to be responsible for microalgae blooms were the absolutely dominant species, such as Skeletonema costatum, Navicula sp., Thalassionema nitzschioides,Pleurosigma sp., and Licmophora abbreviata. The monthly variabilities in phytoplankton abundance could be explained by water temperature, dissolved oxygen, salinity, dissolved inorganic nitrogen（DIN）, and suspended solids. The results of a redundancy analysis showed that p H and nutrients, including DIN and silicate（SiO_4）, were the most important environmental factors controlling phytoplankton assemblages in specific months. It was found that nutrients and pH levels that were mainly influenced by mariculture played a vital role in influencing the variation of phytoplankton assemblages in the Yantian Bay. Thus, a reduction of mariculture activities would be an effective way to control microalgae blooms in an enclosed and intensively eutrophic bay.

关 键 词：Sansha Bay PHYTOPLANKTON EUTROPHICATION microalgae blooms bioremediation East China Sea 

分 类 号：Q948.8[生物学—植物学]