Seasonal Variation of Environmental Variables and Phytoplankton Community Structure and Their Relationship in Liaodong Bay of Bohai Sea,China  

作　　者：YANG Guojun WU Zhongxin SONG Lun LU Xiaoqian 

机构地区：[1]College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China [2]Center for Marine Ranching Engineering Science Research of Liaoning Province,Dalian Ocean University,Dalian 116023,China [3]College of Marine Science and Environment,Dalian Ocean University,Dalian 116023,China [4]Liaoning Ocean and Fisheries Science Research Institute,Dalian 116023,China

出　　处：《Journal of Ocean University of China》2018年第4期864-878,共15页中国海洋大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.31400406);the Public Science and Technology Research Funds Projects of Ocean(No.201505019);the Natural Science Foundation of Liaoning Province under contract(No.201402 0182);the Science and Technology Project of Liaoning Province(No.2015103044)

摘　　要：In this paper, systematic studies on the changes in concentrations of the environmental factors and the net-phytoplankton community, and the relationship between them in the Liaodong Bay, Bohai Sea during 2013 are presented. The PCA results showed that higher levels of nutrients and dissolved heavy metals in the river-estuary-bay system were closely related to the river runoff. Since the influences of industrial and anthropogenic activities, the Liaodong Bay coastal areas are facing a huge environmental challenge of nutrients and heavy metal pollution. Net-phytoplankton community structure showed obvious seasonal succession, among which the dominant and(or) key species were the main factors affecting community structure change and stability. Under certain environmental conditions, the dominant species and(or) key species dominated the phytoplankton community structure succession. The Bio-ENV results suggested that the seawater temperature, nutrient, Cu, Pb, Zn, and Cd in Liaodong Bay are important environmental variables that affect the phytoplankton community structure. Anthropogenic activities have significantly contributed to the changes in concentrations of environmental factors and the net-phytoplankton community structure and stability, and the relationship between them.In this paper, systematic studies on the changes in concentrations of the environmental factors and the net-phytoplankton community, and the relationship between them in the Liaodong Bay, Bohai Sea during 2013 are presented. The PCA results showed that higher levels of nutrients and dissolved heavy metals in the river-estuary-bay system were closely related to the river runoff. Since the influences of industrial and anthropogenic activities, the Liaodong Bay coastal areas are facing a huge environmental challenge of nutrients and heavy metal pollution. Net-phytoplankton community structure showed obvious seasonal succession, among which the dominant and(or) key species were the main factors affecting community structure change and stability. Under certain environmental conditions, the dominant species and(or) key species dominated the phytoplankton community structure succession. The Bio-ENV results suggested that the seawater temperature, nutrient, Cu, Pb, Zn, and Cd in Liaodong Bay are important environmental variables that affect the phytoplankton community structure. Anthropogenic activities have significantly contributed to the changes in concentrations of environmental factors and the net-phytoplankton community structure and stability, and the relationship between them.

关 键 词：LIAODONG BAY environmental VARIABLES EUTROPHICATION trace metals PHYTOPLANKTON community ecological stability 

分 类 号：Q948.8[生物学—植物学]