三沙湾浮游植物的分布

Distribution of phytoplankton in Sansha Bay,Fujian

本文分析、鉴定了于1990年5、8、11月和1991年2月,采自福建三沙湾的64份样品。记录浮游植物115种,其中蓝藻1种,硅藻97种,甲藻17种。浮游植物细胞总量的年平均值为17.50×10~4个/m^3,其年高峰出现于春季5月,达43.84×10~4个/m^3,低谷出现于冬季2月,仅1.16×10~4个/m^3。

This paper reports composition and distribution of phytoplanktons in Sansha Bay of Fu-jian province.Among 115 species,there are 1 blue algae,97 diatoms and 17 Pyrrophyta,inwhich 12 dominant species are Biddulphia sinensis、B.regia、Coscinodiscus centralis,C.oculus-iridis、Chaetoceros decipiens,Ditylum brightwellii、Bacillaria paradoxa、N.sigma、Skeletonemacostatum、Thalassiothrix frauenfeldii,Ceratium fusus and Noctiluca scintinllans.Accordingto the distribution,two ecological groups can be divided as eurythermic and warm waterspecies.The total phytoplankton cell count by average is 17.50×10~4 ind./m^3 with the annualpeak of 43.84×10~4ind./m^3 observed in May and the lowest value,1.16×10~4ind./m^3 inFebruary.The results show that the environmental factors,such as temperature salinity,monsoon and water currents are important in affecting the phytoplankton species compositionand distribution