| 摘要: |
| 2009 年10 月在辽东湾西部海域进行了14 个站位的大型底栖动物调查, 共发现大型底栖动物99种, 其中多毛类44 种, 软体动物13 种, 甲壳动物39 种, 其他类群3 种。调查海域内IRI 指数排名前十位的种中, 多毛类和甲壳动物各占60%和40%, 其中前三位的是日本双边帽虫(Amphictene japonica)、二齿半尖额涟虫(Hemileucon bidentatus)和滩拟猛钩虾(Harpiniopsis vadiculus)。调查海域内大型底栖动物的总平均丰度为2387.1 个/m2, 总平均生物量为11.16 g/m2, 整个调查海域内大型底栖动物呈现出高丰度低生物量的现状。调查海域内大型底栖动物的香农-威纳多样性指数为0.8881～4.626, 平均值为3.556; 丰富度指数为1.197～5.474, 平均值为3.426; 均匀度指数为0.213～0.9248, 平均值为0.7714。以40%的相似性尺度, 取样站可被划分为5 个大型底栖动物站组。通过大型底栖动物多样性分析, 本文认为该海域的底栖生态状况良好。 |
| 关键词: 辽东湾西部海域 大型底栖动物 群落结构 多样性 |
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| Community structure characteristics of macrobenthos in the western waters of Liaodong Bay in autumn |
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| Abstract: |
| Macrobenthos was investigated at 14 stations in the western waters of Liaodong Bay in October 2009. In total, 99 species were found, including 44 species of Polychaeta, 13 species of Mollusca, 39 species of Crustacea, and 3 species of other taxonomies. Polychaeta and Crustacea were accounted for 60% and 40% respectively in the top 10 IRI; the top three were Amphictene japonica, Hemileucon bidentatus and Harpiniopsis vadiculus. The average abundance of macrobenthos was 2387.1 ind./m2, and the average biomass was 11.16 g/m2 in the sampling sites. The range of Shannon-Wiener index of macrobenthos in the investigated waters was 0.8881～4.626, with an average of 3.556. The range of corresponding Margalef’s richness index was 1.197～5.474, with an average of 3.426. The range of Pielou's evenness index was 0.213～0.9248, with an average of 0.7714. A total of five macrobenthic groups were split out from these stations at 40% similarity. According to the result of this investigation, the macrobenthic community structure was not disturbed. |
| Key words: the western waters of Liaodong Bay macrobenthos community structure diversity |
