广西涠洲岛海域浮游植物和赤潮生物种类组成的初步研究

Preliminary Studies on Phytoplankton and Red Tide Organism Composition in the Coastal Water of the Weizhou Island, Guangxi

根据2006年3—11月期间对涠洲岛海域进行赤潮监控监测获得的调查资料,对该海域调查期间的浮游植物组成和各月的优势种变化作了分析。结果显示:涠洲岛水域浮游植物有5属103种,其中蓝藻1属2种,硅藻34属83种,甲藻8属16种,着色鞭毛藻门1属1种,绿藻门1属1种;赤潮生物有29属60种,其中蓝藻1属2种,硅藻18属40种,甲藻8属16种,着色鞭毛藻1属1种,原生动物1属1种;浮游植物优势种有球形棕囊藻、红海束毛藻、菱形海线藻、旋链角毛藻、洛氏角毛藻等,均属赤潮物种。调查期间涠洲岛海域浮游植物优势种更替现象明显,与水温等环境因子的变动有关。

According to the red tide investigation data ranging from March to November in 2006, the specific composition of phytoplankton and monthly change of dominant species of the coastal water of the Weizhou Island were analyzed. The phytoplankton were composed of 103 species belonging to 45 genera, including cyanobacteria of 1 genus （ 1 species ）, diatom of 34 genera （ 83 species ）, dinoflagellates of 8 genera （ 16 species ）, chrysophytes of 1 genus （ 1 species ） and chlorophyta of 1 genus （ 1 species ）. Analysis of the investigation data also showed that red tide organisms in the seawater of the Weizhou Island consisted of 60 species belonging to 29 genera, including cyanobacteria of 1 genus （ 2 species ）, diatom of 18 genera （ 40 species ）, dinoflagellates of 8 genera （ 16 species ）, chrysophytes of 1 genus （ 1 species ） and protist of 1 genus （ 1 species ）. Dominant species were Phaeocystis globosa, Trichodesraiura erythraeura, Thalassioneraa nitzschioides, Chaetoceros curvisetus and Chaetoceros lorenzianus, which all belonged to red tide organisms. Obvious subrogation of phytoplankton dominant species were observed, which correlated with the environment factors such as water temperature.