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首页> 中文期刊> 《中国海洋大学学报：英文版》 >Composition and Distribution of Planktonic Ciliates in the Southern South China Sea During Late Summer： Comparison Between Surface and 75 m Deep Layer

Composition and Distribution of Planktonic Ciliates in the Southern South China Sea During Late Summer： Comparison Between Surface and 75 m Deep Layer

         
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摘要

Ciliates are very important components in most marine ecosystem.They are trophic link between the microbial food web and grazing food chain.In this study,ciliates were collected from 11 sites in the southern South China Sea(SCS) during August 25 to September 28,2011.Their composition and distribution at the surface and 75 m deep depth of the ocean were studied.A total of 30 species belonging to 22 genera were identified,and 22 species of 15 genera were Tintinnids.Eutintinnus fraknoii and E.stramentus were the most common species.The other dominants were strombidiids ciliates including Strombidium conicum and S.globosaneum,which were followed by the tide form,Mesodinium pulex.Ciliates abundance ranged from 46 ind L^(-1) to 368 ind L^(-1) in the open sites,46–368 ind L^(-1) at surface and 73–198 ind L^(-1) at 75 m deep layer.In the Yongshu reef,ciliates abundance ranged from 167 ind L^(-1) to 365 ind L^(-1) in the water column,similar to that in Sanya coral reef waters.Ciliates composition showed obvious difference between surface and 75 m deep layer at station S2(P < 0.05),while no similar result was observed at other sites.At 75 m deep layer,salinity was negatively related to mixed layer depth(P < 0.05),but positively to chlorophyll a concentration(P < 0.05),indicating that the change of vertical mixing in water column influenced vertical distribution of ciliates in the southern SCS.

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