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该文是渤海 1997年 6月、1998年 9月和 1999年 4月 3个航次小型底栖生物调查结果。结果表明 ,3个航次小型底栖生物的平均丰度分别为 :(2 30 0± 12 0 6 ) ind/ (10 cm2 )、(86 9± 5 10 ) ind/(10 cm2 )和 (6 32± 4 0 0 ) ind/ (10 cm2 )。平均生物量分别为 :(15 2 1± 6 34) μg(dwt) / (10 cm2 )、(72 5±35 4 )μg (dwt) / (10 cm2 )和 (5 17± 393)μg (dwt) / (10 cm2 )。共鉴定出 14个小型底栖生物类群 ,其中自由生活海洋线虫丰度占绝对优势 ,桡足类丰度居第 2位 ,这两个类群总和占小型底栖生物总丰度的 94 .8%～ 97.5 %。在生物量中所占比例列前 4位的类群依次为线虫、多毛类、桡足类、双壳类 ,加起来超过小型底栖生物总生物量的 80 %。小型底栖生物的 74 %分布于 2 cm以浅表层中。小型底栖生物的丰度和生物量在渤海海峡和渤海中东部较高 ,与环境因子的相关分析表明小型底栖生物的丰度与水深呈极显著的正相关 ,与沉积物的中值粒径呈显著的负相关
This article is the result of the survey of the benthic macro-benthos in Bohai Sea in June 1997, September 1998 and April 1999. The results showed that the mean abundances of the three benthic macrobenthos were (ind) (2 30 0 ± 12 0 6) ind / (10 cm2), (86 9 ± 5 10) ind / (10 cm2) and (6 32 ± 4 0 0) ind / (10 cm2). The mean biomass was (15 2 1 ± 6 34) μg (dwt) / (10 cm2), (72 5 ± 35 4) μg (dwt) / (10 cm2) and (5 17 ± 393) μg ) / (10 cm2). A total of 14 small benthic fauna were identified, of which the abundance of free-living marine nematode accounted for the absolute superiority and the abundance of copepods ranked second, accounting for 94.8% of the total abundance of meiobenthos, ~ 97.5%. The top four groups in terms of biomass were nematodes, polychaetes, copepods and bivalves, which together accounted for more than 80% of the total biomass of meiobenthos. 74% of the small benthic organisms are distributed in 2 cm shallow surface. The abundance and biomass of meiobenthos were higher in the Bohai Strait and the central and eastern Bohai Sea. Correlation analysis with environmental factors showed that the abundance and water depth of meiobenthos had a very significant positive correlation with the sediment median grain Path was significantly negative correlation