渤海湾浮游植物的多样性分析

Diversity analyse of phytoplankton in the Bohai Bay

2004年6月～10月对渤海湾海域的浮游植物群落结构及其多样性进行了调查分析。结果表明，2004年三个航次调查共鉴定出浮游植物50种，浮游植物种数以硅藻门为主，硅藻种数占浮游植物总种数的66％。浮游植物数量呈现6月最高、10月次之、8月最低的趋势。浮游植物多样性、群落结构复杂性以及海水水质随10月、8月、6月逐渐降低。

Community structure and diversity of marine phytoplankton in Bohai Bay were analyzed from June to October in 2004. The results were showed that Bacillariophyta were the preponderant species that almost took up 66% of totally 50 species of phytoplankton identified in thrice by means of field trips. The quantity of phytoplankton that gradually decreased along June, Oct, Aug. The diversity of phytoplankton, complexity of community structure and the quality of water gradually decreased along Oct, Aug and June, vary with temporal distribution. Based on the diversity index, the water quality of Bohai Bay evaluated was in the state of moderate and severe pollution.