在对台湾以北海域浮游桡足类生物海洋学特征进行数量分布方面的研究后的续篇，重点对本海区浮游挠足类的群落结构和群落性质以及与栖区环境条件间的关系作了分析探讨．结果表明，本区桡足类群落结构种类组成复杂，出现种类共２３７种，但周年共有种比例仅占３２％．桡足类群落的多样度和均匀度年均值各为３．７１４和０．６９０，在平面分布上呈外部海区高于近岸海区的大体趋势．本区群落可划分为５个生态类群，其中暖水性外海高温偏低盐类群和热带大洋高温高盐类群可分别指示台湾海峡水和黑潮表层水的季节消长过程．从不同侧面的计算分析均表明，冬季在环境条件上均有异于其他３季．在春、夏、秋季，以普通波水蚤最具优势，盐度是影响群落特征值的主导因子，群落的性质是以暖水性外海种类为主、热带大洋种也占相当比例的亚热带－热带群落结构的特点；在冬季，主要优势种是海洋真刺水蚤，温度是群落特征值的主要制约因子，群落呈现以热带大洋种占支配地位的热带大洋群落结构属性． In the sequel to the quantitative distribution of the biological oceanographic features of pelagic copepods in the northern sea area of ​​Taiwan, the relationship between community structure and community properties of pelagus solitarius in this area and their environmental conditions in habitats was analyzed . The results showed that the species composition of copepods in this area is complex, with a total of 237 species present, but only 32% of the total species in the year were co-cultivated. The annual average of diversity and evenness of copepods was 3.714 and 0.690, respectively. The distribution of copepods community was higher than that in coastal areas. The communities in this area can be divided into five ecological groups. Among them, the warm-water high-temperature and low-salinity offshore groups and the high-temperature and high-salinity tropical oceanic groups can respectively indicate the seasonal fluctuation of surface water in the Taiwan Strait and Kuroshio. Computation and analysis from different sides show that the winter conditions are different from those of the other three seasons. In spring, summer and autumn, the most predominant species are common water-daphnids, and salinity is the dominant factor affecting the community characteristic values. The nature of the community is dominated by warm-water off-shore species and the tropical oceanic species also accounts for a considerable proportion of subtropical-tropical In winter, the dominant species was Daphnia magna and the temperature was the main limiting factor of community characteristic values. The community showed the structural properties of the tropical oceanic community dominated by the tropical oceanic species.