胶州湾典型站位小型底栖生物丰度和生物量的季节变化研究

2003年-2004年对胶州湾B2站小型底栖生物进行了7个航次的调查，结果表明B2站小型底栖生物的平均丰度是1889±609 ind.10cm-2，其中5月丰度值最高，为2721.5±776.7 ind.10cm-2，最低值出现在2003年9月，其丰度为1094.2 ±497.4 ind.10cm-2；平均生物量和生产量分别为1292.3±534.4μg dwt?10cm-2和11630.4±4809.5μg dwt?10cm-2?a-1。One-Way ANOVA分析表明，B2站小型底栖动物丰度和生物量存在显著的季节变化。共鉴定出17个小型底栖动物类群，其中线虫占绝对优势，其平均丰度是1801.82 ind.10cm-2，占小型底栖动物总丰度的95.4%。小型底栖生物数量与环境因子的相关分析表明，影响小型底栖生物数量发生季节变化的主要因子0-2cm表层Chl-a含量。

A Study on Seasonal Variation of Abundance and Biomass of Meiofauna at the Typical Station in Jiaozhou Bay

To study seasonal variation of abundance and biomass of meiofauna at the typical station in Jiaozhou Bay the samples of seven cruises were collected at B2 station from 2003 to 2004.The result showed that the average abundance,biomass and production of meiofauna at B2 station in Jiaozhou Bay was 1889±609 ind/10 cm2,1292.3±534.4 μg/10 cm2 and 11630.4±4809.5 μg/10cm2/a from 2003 to 2004,respectively.Significant seasonal changes of meiofauna abundance and biomass were observed.A total of 17 groups of meiofauna.Free living marine nematodes were the most dominant group.The average abundance of nematodes was 1801.82 ind/10 cm2,accounting for 95.4% of the abundance of meiofauna,with benthic harpacticoid copepods in the second,accounting for 2.2%.Correlation analysis showed that 0-2cm Chl-content was the most important factor which affected the seasonal change of meiofauna abundance and biomass.