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Composition and distribution of ciliates inner and outer of Daya Bay, China
Authors:Huaxue Liu  Liangmin Huang  Yehui Tan  Xingyu Song  Jianrong Huang
Abstract:Daya Bay was undergoing eutrophication process by increased nutrient loading, and the changes in nutrients have strongly influenced the phytoplankton community structure. Ciliates are common component of planktonic community, what role do ciliates play in Daya Bay was still unknown. In this study, ciliates were enumerated and identified from the inner and outer Daya Bay during three seasons. Thirty-one species belong to 16 genera of ciliates were recorded, and Cyclotrichida, Strombidiida, Tintinnida were most common. In spring, ciliates abundance of D2 was lower than D1 and D3, abundance in the surface of D1 and D3 were higher than in the bottom, while D2 showed the opposite character. The lowest ciliate abundance was found in the E1 in summer. In fall, Ciliates abundance of D3 was lower than in fall, and abundance in the surface was lower than in the bottom, which was different compared to in spring. Different hydrographic character was shown between the surface (high temperature, low salinity and nutrients) and bottom layer (low temperature, high salinity and nutrients) at E1 in summer. Ciliate abundance had no significant variation between the surface and bottom at E1 in summer, but ciliates community structure changed a lot.
Keywords:Ciliates  Composition  Distribution  Daya Bay
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