北部湾海域小型底栖动物丰度和生物量

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摘要

根据2008年10月4日至8日北部湾海域生态环境综合调查资料,对北部湾海域小型底栖动物的类群组成、丰度和生物量分布进行了分析研究,结果表明,研究海域的小型底栖动物平均丰度约为399.09±452.20 had·10cm^-2,平均生物量约为359.56±324.45μg·10cm^-2;按丰度来讲,分选出的14个类群中,自由生活海洋线虫的丰度为最优势,约占总丰度的92.69%,其次为底栖桡足类和多毛类,分别约占总丰度的3.28%和2.47%;线虫、多毛类和桡足类分别约占总生物量的41.16%、38.34%和6.76%。研究海域的钦州、防城港市沿岸海区小型底栖动物平均丰度相对较高,其平均丰度约为614.98±799.63 ind·10cm^-2;涠洲岛周边海区和北海南部近岸海区平均丰度分别约为481.68±240.03 ind·10cm^-2和278.14±126.38 ind·10cm^-2;对照海区的小型底栖动物平均丰度约仅有197.37±116.72 ind·10cm^-2。根据各站位小型底栖生物的种类组成及其丰度进行了多样性分析,各站位丰富度指数介于0.466～1.516之间,均匀度指数介于0.203～1.13之间,Shannon-Weiner指数(H')介于0.141～0.783之间。根据类群组成及其丰度进行组平均法聚类分析,把研究海区各站位分成了3个不同的底栖生物群落。研究海区线虫和桡足类丰度的比率变化范围在5.02～223.83之间。

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	王彦国
	王春光
	陈小银
	林茂
	项鹏
	王雨

关键词 ：小型底栖动物, 丰度, 生物量, N/C比值, 北部湾

Abstract：

A biological investigation was made in the Beibu Gulf in October 2008.The composition,abundance,and biomass of meiobenthos were analyzed.Totally,there were 14 meiobenthos identified.The results showed that the average abundance of meiobenthos was 399.09±452.20 ind·10cm^-2,and average biomass was 359.56±324.45μg·10cm^-2(dry weight).As to the abundance, free-living marine nematode was the most dominant group,with a relative dominance of 92.69%.Benthic Copepoda and Polychaeta followed,which accounted for 3.28% and 2.47% of total abundance.In terms of biomass,nematode was also the dominant group, accounting for 41.16% of total biomass.Polychaeta and Copepoda occupied 38.34% and 6.67% of total biomass respectively. Meiobenthos abundance was the highest in the coastal area of Qinzhou and Fangchenggang City,and the average abundance was 614.98±799.63 ind·10cm^-2 in this area.The average abundance of meiobenthos was 481.68±240.03 ind·10cm^-2 in the Weizhou Island coastal area,and 278.14±126.38 ind·10cm^-2 in the southern Beihai City coastal area.Average abimdance was the lowest in the contrast coastal area(197.37±116.72 ind·10cm^-2).The biodiversity indexes were analyzed based on the composition and abundance.The Margalefs index ranged from 0.466 to 1.516 in all stations;the Pielou's index ranged form 0.203 to 1.13;the Shannon-Weiner's index ranged from 0.141 to 0.783.The meiobenthos was divided into three different communities in the study area.The ratio of nematode to Copepoda(R value) ranged from 5.02 to 223.83.

Key words： meiobenthos abundance biomass N/C ratio the Beibu Gulf

收稿日期: 2011-08-25

Q178.53

基金资助:科技部基础专项(2006FY220700);国家海洋局第三海洋研究所基本科研业务费专项资金资助项目(海三科2009030);国家908专项资助项目(908-ZC-Ⅱ-02,908专项海洋生物样品库)

引用本文:

王彦国, 王春光, 陈小银, 林茂*, 项鹏, 王雨. 北部湾海域小型底栖动物丰度和生物量[J]. , 2011, 30(4): 375-382.
WANG Yan-guo, WANG Chun-guang, CHEN xiao-yin, LIN Mao, XIANG Peng, WANG Yu. Abundance and biomass of meiobenthos in the Beibu Gulf. , 2011, 30(4): 375-382.

链接本文:

http://www.ecolsci.com/CN/Y2011/V30/I4/375

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