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20 0 3年5、7、9、1 1月对黑龙江浮游动物的种类组成结构特征进行了研究。结果表明:浮游动物共计4门64种,以原生动物、轮虫为主,分别占35 . 94%和42 . 1 9% ;前节晶囊轮虫、锥形似铃壳虫、螺形龟甲轮虫、尖削叶轮虫、萼花臂尾轮虫、多足变形虫、单缩虫等为优势种。浮游动物数量为685. 9 8ind . /L ,以原生动物为主;数量为5 875ind . /L ,占85 .64% ;生物量为0 .91 6mg/L ,轮虫最高,为0 . 5 91mg/L。浮游动物季节变化比较明显,数量春季最高为1 1 .897ind . /L ;生物量以秋季最高1. 5 6mg/L ;水平分布勤得利江段最高,平均为8430ind . /L和1 . 2 34mg/L。黑龙江浮游动物多样性指数变化是秋季>夏季>冬季>春季。均匀度指数变化是秋季>夏季>冬季>春季。
The species composition and structure of zooplankton in Heilongjiang were studied in May, July, July and January of 2003. The results showed that there were altogether 64 species of zooplankton, mainly protozoa and rotifer, accounting for 35.94% and 42.1%, respectively; Insects, spiked impeller, Brachionus calyciflorus, multi-footed amoeba, parasitoids and other dominant species. The number of zooplankton was 685. 9 8ind. / L, mainly protozoa; the number was 5 875ind. / L, accounting for 85.64%; the biomass was 0.91 6mg / L and the highest rotifer was 0.5 91 mg / L. The seasonal variation of zooplankton was more obvious, the highest in spring was1.1.897ind. / L, and the highest in autumn was1.56mg / L. The horizontal distribution was highest in Qindelijiang section with an average of 8430ind. / L and1.234mg / L. The change of zooplankton diversity in Heilongjiang is autumn> summer> winter> spring. Changes in evenness index were autumn> summer> winter> spring.