北黄海獐子岛海域浮游动物群落年际变化

本文比较了海洋普查期间（1959年1-12月）和2009-2010年獐子岛海域附近站位的浮游动物的种类组成、优势种、丰度、生物多样性，结果显示，北黄海区域浮游动物群落物种组成未发生较大的变化，在獐子岛海域以及整个北黄海，中华哲水蚤和强壮箭虫的优势种地位没有发生变化，细足法虫戎也一直出现且为冬春季的优势种；太平洋磷虾在2009-2010年獐子岛海域虽然全年均有出现，但是全年均不是优势种，而在1959年的獐子岛海域，作为优势种出现在4月和11月；1959年与2009年相较，腹针胸刺水蚤在春夏季优势种的地位被沃氏纺锤水蚤所取代。2009年浮游动物丰度（131.26 ind/m3）比1959年（78.90 ind/m3）高；浮游动物多样性指数（H'）均在夏秋季高于冬春季节，且年平均多样性指数也有所提高。

Interannual variations of zooplankton in Zhangzi Island, North Yellow Sea

The annual zooplankton data for large areas in the Northern Yellow Sea during the marine census period (1959.1-1959.12) was analyzed in comparison to the annual zooplankton data around Zhangzi Island of the year 2009 in the aspects of species composition, dominant species, biological abundance and biodiversity. The results showed that zooplankton community around Zhangzi Island of North Yellow Sea did not exhibit significant changes. Calanus sinicus and Saggita crassa were observed as firmly dominant species. Themisto gracilipes was collected constantly each month, but it was dominant only in the winter and spring. In 2009, Euphausia pacifica was sampled in each month, but did not appear as dominant species; however, in 1959, it was observed as the dominant species in April and November. The dominant position of Centropages abdominalis in 1959 was replaced by Acartia omorii in 2009 in the spring and summer.The average abundance of zooplankton increased from 78.90 ind/m³ to 131.26 ind/m³ from 1959 to 2009; the biodiversity index (H'') was higher both in the summer and autumn than in the spring and winter in these two years, and the average biodiversity index value also increased.