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The Ecological Characteristics of Phytoplankton in Dapeng Bay,South China Sea

Qi Yuzao;Lu Songhui(Institute of Hydrobiology,Jinan University,5100632,Guangzhou)  
The ecological studies on Dapeng Bay,South China Sea,were carried out in 1990-1992.252taxa of phytoplankton were recorded.of them,1 new species.Pseudonitzschia sinica Qi etWang and many new records in China were found in the Bay.The phytoplanktoncomposition and distribution were analysed.Dominant species, were also indicated,such asNoctiluca scintillans,Skeletonema costatum,Pseudonitschia pungens,Rhizosonenia alata,Alexandrium tamarense etc.In spring,1991,Chattonella marina,a Raphidophyean speciesbloom occurred.As eclological pattern,warm-neritic species, prevail predominently.of the 20red tide causativ organisms,some are toxic.They are Alexandrium catenlla,Al.tamarenseand Gymnodinium sp.The distribution of Dapeng Bay′s phytoplankton in comparision to thatof the neibouring waters was discussed.
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