2010年春季长江口及邻近海域砂壳纤毛虫的分布特点
Distribution of Tintinnids (Ciliophora, Tintinnida) in the Changjiang Estuary and Adjacent Areas in Spring

DOI: 10.12677/AMS.2015.23007, PP. 45-52

Keywords: 砂壳纤毛虫，丰度，生物量，群落特征，长江口
Tintinnid, Abundance, Biomass, Community Structure, Changjiang Estuary

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Abstract:

于2010年春季(5月)在长江口及邻近海域进行砂壳纤毛虫丰度和生物量的调查。砂壳纤毛虫的丰度范围为0~1362 ind/L，平均丰度为226 ± 243 ind/L；砂壳纤毛虫的生物量范围为0.00~5.97 μg C/L，平均生物量为0.54 ± 0.86 μg C/L。表、中和底层砂壳纤毛虫丰度和生物量的高值区一般分布在长江口外海域的中部；砂壳纤毛虫丰度和生物量均在表层达到最高值，随水深增加明显降低。共鉴定出砂壳纤毛虫9属22种，其中拟铃虫属(Tintinnopsis)种类最多。主要优势种为百乐拟铃虫(Tintinnopsis beroidea)、黏粘筒壳虫(Tintinnidium mucicola)和白领细壳虫(Stenosemella nivalis)。砂壳纤毛虫群落Shannon指数的平均值为1.05 ± 0.59，Pielou指数的平均值为0.66 ± 0.33。砂壳纤毛虫群落水体Shannon指数和Pielou指数的高值区主要分布在长江口外海域。
We investigated the abundance and biomass of tintinnids in the Changjiang Estuary and adjacent areas in spring of 2010. The average abundance of tintinnids was 226 ± 243 ind/L, ranging from 0 to 1362 ind/L. The average biomass of tintinnids was 0.54 ± 0.86 μg C/L, ranging from 0.00 to 5.97 μg C/L. High value areas of tintinnid abundance and biomass were mainly distributed in the middle area off the Changjiang Estuary. Tintinnids tended to accumulate in the surface layer. Twenty two tintinnid species were identified, 11 of which were in genus Tintinnopsis. The most dominant species were Tintinnopsis beroidea, Tintinnidium mucicola and Stenosemella nivalis. The average Shannon index and Pielou index were 1.05 ± 0.59 and 0.66 ± 0.33, respectively. The Shannon index and Pielou index were higher in the area off the Changjiang Estuary.

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