根据1988及1992年浮游动物月度海上调查数据，并结合1980、2000和2007-2009年已报道的浮游动物调查结果，研究了象山港海洋牧场示范区浮游动物群落特征的长期变化。分析发现浮游动物生物量和丰度从1988年至1992及2000年表现出下降的年际变化，其生物量的峰值模式呈由冬季向夏春季的转变趋势；桡足类的生物量和丰度在1988年和2007-2009年间的变化无明显规律，但生物量峰值发生了由冬季向夏春季的转变；冬春季典型优势种墨氏胸刺水蚤（Centropages mcmurrichi）的优势地位表现不稳定。%Based on the monthly zooplankton data from the years of 1988 and 1992 in the model area of sea ranching for fisheries in the Xiangshan Bay, this paper explored the long -term views of dynamics as for the zooplankton community indices in combination with either earlier or later reported data sets from the years of 1980, 2000 and ones from 2007 to 2009. Main points were concluded as follows. Zooplankton biomass and abundance showed decreasing changes in terms of the inter-annual differences from 1988 to 1992 and till 2000. The seasonal pattern of zooplankton biomass peak has changed from winter to summer or spring. Variations of copepod biomass and abundance did not present any obviously observable trends based on the comparisons between the year of 1988 and the years of 2007-2009, but the seasonal pattern of copepod biomass peak was in correspondence with total biomass of zooplankton which changed from winter to summer and spring. The destabilization of the typically winter-spring dominant species Centropages mcmurrichi has been noticed.
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