厦门东海域和安海湾小型底栖动物的密度和生物量

Density and biomass of the meiofauna in the eastern sea of Xiamen and Anhai Bay

2007年6月对厦门东海域5个站位和晋江安海湾4个站位进行了小型底栖动物调查,分析了小型底栖动物的类群组成、密度和生物量.结果表明,从这两个海域样品中共鉴定出12个小型底栖动物类群,厦门东海域和安海湾自由生活海洋线虫分别占总数量的84.56%和98.19%.生物量组成和密度组成不同,厦门东海域多毛类(37.80%)、海洋线虫(33.32%)和底栖桡足类(18.64%)共同组成了小型底栖动物的生物量优势类群;安海湾生物量优势类群是由海洋线虫(67.64%)和多毛类(30.46%)组成.厦门东海域小型底栖动物的平均密度为22.67±10.21 ind/cm2,平均生物量为23.01±10.41μg/cm2;安海湾的平均密度为31.48±45.58 ind/cm2,平均生物量为18.28±25.69μg/cm2.

The meiofauna was investigated in the eastern sea of Xiamen and Anhai Bay in July 2007. The results showed that the meiofauna density in the eastern sea of Xiamen was 22.67 ± 10.21 ind/cm^2, the average biomass was 23.01 ± 10.41 μg/cm2. The density in Anhai Bay was 31.48 ±45.58 ind/cm^2 and the average biomass was 18.28 ±25.69 μg/cm^2. A total of 12 groups were recognized in the study and free-living marine nematode was the most dominant group accounting for 84.56% in the eastern sea of Xiamen and 98.19% in Anhai Bay,respectively. Based on the biomass, polychaetes （ 37.80 % ） , marine nematodes （ 33.32 % ） and benthic copepods （ 18.64 % ） were the most important groups in the eastern sea of Xiamen while they were marine nematodes （67.64%） and poly- chaetes （30.46%） in Anhai Bay.