台湾海峡北部海区浮游动物的分布和群落划分

ZOOPLANKTONIC DISTRIBUTION AND COMMUNITY DIVISION IN NORTHERN WATERS OF TAIWAN STRAIT

1994年8月（夏季）和1995年2月（冬季），对25．00－26．50°N，122.00°E以西水域的浮游动物进行了2个航次调查。结果表明，非胶质浮游动物总生物量有明显的季节变化，夏季生物量为冬季的5．88倍。夏季的浮游动物总生物量和群落多样性（H'）均较丰富，这和多个水团在此交汇有关。通过聚类分析，两个季节都存在两个不同的群落，群落生活小区的位置有明显的季节变化。夏季的两个暖流水群落和冬季台湾海峡混合水群落的H'值高和比较高，浙闽沿岸水群落的H'值低。

In August of 1994 (summer) and February of 1995 (winter), surveyes of 2 cruises were carried out in the survey area to the west of 25.00-26. 5°N, 122. 00°E. The results show that the biomass of non-gelatinous zooplankton has evidently seasonal variations. The zooplanktonic biomass in summer is 5. 88 times that in winter. In summer, zooplanktonic biomass and zooplanktonic diversity are larger, which has relation to the meeting of a number of water masses in the water areas. Gathering analysis shows that the investigated area has two different communities of zooplankton both in summer and winter. The locations of community biotopes have evidently seasonal variation. In summer, the diversity indices of the two zooplanktonic communities of high temperature and high salinity water are great. In winter, the diversity index of the zooplanktonic community of mixed water in the Taiwan Strait is larger. The diversity index of zooplanktonic community in coastal water is low.