台湾以东副热带环流区大中型浮游桡足类的生态特征

根据1995~1997年期间在台湾岛以东副热带环流区进行4个季度月的综合调查资料,分析了该海域浮游桡足类的数量分布及其群落的生态特征,探讨其与环境因素的相关性.结果表明,本区大中型浮游桡足类呈低丰度(4个季度平均为6.75个/m3)、低优势度(Y<0.131)以及季节变化幅度小等特点.所记录的206种浮游桡足类中,5种生态类群共存.不同性质水系在测区间的动态制约着不同生态类群的配比,但丝毫左右不了热带大洋广布类群的主导地位.

Ecological characteristics on macro-medium planktonic copepods in the subtropical circulation zone east of Taiwan Island

The abundance distribution and ecological characteristics of planktonic copepods are analyzed.Their relations to the environmental factors are discussed based on data obtained from 4 cruises during a multidisciplinary survey in the waters under the subtropical circulation zone east of Taiw an Island from 1995 to 1997.The results show that the macro-medium planktonic copepods in this region is the characteristics of low abundance (four seasons average 6.75 cells/m³), low dominance (Y< 0.131) and low seasonal variations.A total of 206 copepod species recorded coexisted respectively to 5 ecotypes.It is suggested that these ecotypes were dynamically governed by different water masses nevert heless, the tropical oceanic group was consistently dom inated.