以1998年1月至1999年5月对北部湾海域进行的4个航次生态环境综合调查的资料为基础,分析El Nio/La Nia期间北部湾四季浮游桡足类种类组成与多样性,并对其与气候及海洋水文的关系进行初步探讨。结果显示,调查期间共出现浮游桡足类122种,其中32种周年出现,以春(82种)、夏(84种)较多,秋(52种)、冬(67种)较少;四季共出现优势桡足类13种,以广温广盐类型占主导,除微刺哲水蚤(Canthocalanus pauper)外,其余12种为季节性优势种;冬、夏两季受El Nio影响较大,优势种以中型桡足类为主;秋、春季大型桡足类优势地位较高,受La Nia影响明显;北部湾浮游桡足类多样性较高。分析表明,夏季北部湾水温和盐度对浮游桡足类群落多样性有一定影响,但在其他季节,这种影响不明显。 Based on the data from four comprehensive surveys of the ecological environment of the Beibu Gulf from January 1998 to May 1999, the species composition and diversity of pelagic copepods in the Beibu Gulf during the El Nio / La Nia period were analyzed The relationship between climate and ocean hydrology is also discussed. The results showed that there were 122 species of planktonic copepods during the survey period, of which 32 species appeared in spring, 82 species in summer and 84 species in summer, with less in autumn and 67 species in winter. Thirteen species of copepods appeared predominantly, dominated by broad-temperature and broad-salt type. Among them, 12 species were seasonal dominant species except Canthocalanus pauper, and were affected by El Nio in winter and summer Larger and dominant species were dominated by mid-sized copepods. The dominant species of macro-copepods were higher in autumn and spring and were significantly affected by La Nia. The diversity of planktonic copepods in Beibu Gulf was higher. The analysis shows that the temperature and salinity of the Beibu Gulf have an impact on the diversity of planktonic copepods in summer, but the effect is not obvious in other seasons.