Long-term changes of phytoplankton community in Xiagu waters of Xiamen,China  

作　　者：CHEN Baohong XU Zhuhua ZHOU Qiulin CHEN Changping GAO Yahui YANG Shengyun JI Weidong 

机构地区：[1]School of Life Sciences, Xiamen University, Xiamen 361005, China [2]Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China [3]Marine Environment and Fishery Resources Monitoring Center of Fujian Province,Fuzhou 350003, China [4]Department of Oceanography, Xiamen University, Xiamen 361005, China

出　　处：《Acta Oceanologica Sinica》2010年第6期104-114,共11页海洋学报（英文版）

基　　金：The Scientific Research Foundation of Third Institute of Oceanography,State Oceanic Administration under contract Nos TIO 2007009 and TIO 2009007;the River basin-Estuary ecological security assessment and Management strategy under contract No.200805064;the Natural Science Foundation of Fujian Province under contract No.2010J01260;the "908" Project under contract No.908-02-02-01 special subject;the Program of Chinese Marine Chemistry Investigation and Research under contract No.908-ZC-I-03;the Special Fund of State Oceanic Administration under contract No.908-02-01-02;the Major State Basic Research Development Program of China (973 Program) under contract Nos 2010CB428704 and 2005CB422305

摘　　要：Long-term changes of phytoplankton community by water sampling method in Xiagu Sea waters of Xiamen,China,were investigated in this study.Species composition of the phytoplankton community in these waters changed greatly since the 1950s.The numbers of Dinophyta species increased significantly,although Bacillariophyta species are generally dominant.The succession of dominant species in phytoplankton community is obvious： large-size dominant species such as Biddulphia sinensis of the 1950s were gradually replaced by small-size ones such as Cyclotella striata and Nitzschia closterium,and species that still maintain dominant such as Skeletonema costatum are also small ones,leading the whole phytoplankton community of smaller size.Cell density of phytoplankton community increased greatly,among which cell density of the most dominant species Skeletonema costatum have been increasing in exponent function.Margalef index of phytoplankton community decreased,indicating decline of biodiversity of the community,and dominant character of Skeletonema costatum increased.Generally,the structure of the entire phytoplankton community is becoming more and more singular and unstable,which makes the occurrence of red tides more frequent.The succession in the phytoplankton community is related to the long-term changes in marine environment,influenced by human activities and global climate changes,especially the increases of nutrient content.Long-term changes of phytoplankton community by water sampling method in Xiagu Sea waters of Xiamen,China,were investigated in this study.Species composition of the phytoplankton community in these waters changed greatly since the 1950s.The numbers of Dinophyta species increased significantly,although Bacillariophyta species are generally dominant.The succession of dominant species in phytoplankton community is obvious： large-size dominant species such as Biddulphia sinensis of the 1950s were gradually replaced by small-size ones such as Cyclotella striata and Nitzschia closterium,and species that still maintain dominant such as Skeletonema costatum are also small ones,leading the whole phytoplankton community of smaller size.Cell density of phytoplankton community increased greatly,among which cell density of the most dominant species Skeletonema costatum have been increasing in exponent function.Margalef index of phytoplankton community decreased,indicating decline of biodiversity of the community,and dominant character of Skeletonema costatum increased.Generally,the structure of the entire phytoplankton community is becoming more and more singular and unstable,which makes the occurrence of red tides more frequent.The succession in the phytoplankton community is related to the long-term changes in marine environment,influenced by human activities and global climate changes,especially the increases of nutrient content.

关 键 词：PHYTOPLANKTON community structure XIAMEN water sampling LONG-TERM 

分 类 号：S718.54[农业科学—林学] TV697.25[水利工程—水利水电工程]