大亚湾大鹏澳海域微表层浮游植物群落研究  

Research on phytoplankton community at micro-layer in Dapengao Area of Daya Bay

作　　者：宋淑华[1] 王朝晖[1] 付永虎[1] 谷阳光[1] 

机构地区：[1]暨南大学水生生物研究所,广东广州510632

出　　处：《海洋环境科学》2009年第2期181-185,共5页Marine Environmental Science

基　　金：国家自然科学基金项目(40673062;40773063);国家自然科学基金委员会-广东省人民政府自然科学联合基金(U0633006)

摘　　要：为了解微表层中浮游植物群落的动态变化，于2007年5月～2008年4月对大亚湾大鹏澳海域微表层的浮游植物群落进行了调查和分析。共鉴定出浮游植物142种，其中以硅藻、甲藻为主。还有一些种类的蓝藻和红藻、褐藻等大型藻类的丝状幼体。浮游植物细胞数量在1．90×10^4～8．17×10^5／L之间，年均值为2．45×10^5L。该浮游植物群落由硅藻和蓝藻共同主导，细胞数量年均百分比含量分别为48．41％和42．14％，硅藻细胞数量在夏秋季节占绝对优势，冬季则以蓝藻占据优势地位。Shannon—Weaver多样性指数和均匀度均较高，年平均值分别为3．02、0．62，全年没有明显的季节变化规律。调查表明，一定种类和数量的蓝藻的出现是大亚湾微表层浮游植物的重要特征，在一定程度上标志着该海域水质的恶化。In order to understand the dynamic changes of phytoplankton structure at the micro-layer, annual survey was carried out from May 2007 to Apr. 2008 in Dapengao Area of Daya Bay, South China Sea. A total of 142 species of phytoplankton were identified. Diatoms and dinoflageUates were the dominant phytoplankton groups, meanwhile large numbers of cyanobacteria and filamentous larvae of macroalgae such as red algae, brown algae occurred as well. The phytoplankton abundance is varied from 1.90 × 10^4 to 8.17 × 10^5/L, with an annual mean of 2.45 × 10^5/L. The phytoplankton community was co-dominated by diatoms and cyanobacteria, which contributed 48.41% and 42.14% of the total phytoplankton, respectively. Diatoms were preponderant in summer and autumn, while the cyanobactefia mostly dominated in winter. The values of Shannon-Weaver species diversity index （ H＇ ） and Pielou evenness （J） were high and showed no seasonal variations, with the averages of 3.02 and 0.62, respectively. From the results, it could be suggested that the high abundance and proportion of cyanobacteria were an important feature of the phytoplankton in micro-layer in Daya Bay, it showed the ongoing deterioration of water quality in the area.

关 键 词：大亚湾 微表层 浮游植物群落 蓝藻 

分 类 号：Q178.53[生物学—水生生物学] X55[生物学—普通生物学]