2003～2004年大亚湾澳头养殖区水域浮游植物群落结构及数量变动特征

Changes on community structure and population of phytoplankton in aqua-cultural area of Daya Bay 2003～2004

2003年4月至2004年4月对大亚湾赤潮高发区澳头海域进行了浮游植物群落周年调查和分析。共鉴定浮游植物57属118种。其中硅藻为优势类群,共42属84种,占总种类数的71.2%;甲藻11属27种。浮游植物数量分别在春末夏初,秋末冬初出现两个高峰值,年均值为5.68×105/L。角毛藻属为全年优势属,平均占浮游植物数量的35.4%。Shannon-Weaver多样性指数和均匀度的年平均值分别为2.0和0.44。该海域共发现赤潮生物58种,锥状斯氏藻是最常见的甲藻赤潮生物,2003年8月该藻与海洋卡盾藻在澳头海域首次引发甲藻和针胞藻双相型赤潮。

The composition and seasonal succession in Aotou,an high frequent harmful algal bloom occurrent area in Daya Bay,the South China Sea,were investigated from Apr.2003 to Apr.2004.118 species in total,57 genera were recorded.Diatoms(84 taxa) were the largest group and accounted for 71.2%,followed by dinoflagellates(27 taxa).The dominant population in the area was species of Chaetoceros,and it accounted for 35.4% of the total phytoplankton.The model of quantitative variation was the two-peak type,which appeared...