天津港驴驹河附近海域的浮游植物与赤潮植物

于 2 0 0 3年 7月在天津港驴驹河附近海域设 5个点采样。鉴定表明 ,共有浮游植物 19属 31种 ;优势种类有星脐圆筛藻 (Coscinodiscusasteromphalus)、太阳双尾藻 (Ditylumsol)、菱形海线藻 (Thalassionemanitzschioides)、链状亚历山大藻 (Alexandriumcatenella)等。天津港浮游植物密度较高 ,各站点平均总生物量为 1.2 16× 10 5个 /m3,各站点生物量与叶绿素含量变化规律基本一致。经单项营养指数和营养状态综合指数分析表明 ,除一个站点的COD和两个站点的无机磷略高外 ,所有站位均未达到富营养化水平。调查期间 ,共发现赤潮生物 14种 ,其中主要有星脐圆筛藻、链状亚历山大藻、叉状角藻 (Ceratium furca)、窄隙角刺藻(Chaetocerosaffinis)等。

STUDIES ON PHYTOPLANKTON AND RED TIDE CAUSITIVE SPECIES IN TIANJIN HARBOUR, THE BOHAI SEA

A study on the phytoplankton from 5 stations in Tianjin Harbour near the Lujuhe River, the Bohai Sea, was carried out in July, 2003 A total of thirty-two species were identified. The assorted dominant species included Coscinodiscus asteromphalus, Thalassionema nitzschioides, Pseudo-Nitzschia pungens, Thalassionema frauenfeldii, Alexandrium catenella, etc. The average total phytoplankton density was relatively high, up to 1.216 10 5ind/m 3 in the waters. Synchronous analysis of nutrient concentration revealed that this sea area was mesotrophic. Among the 32 species, 20 were red tide causative species, including poisonous Dinophyceae Alexandrium catenella and Ceratium furca, etc.