北黄海獐子岛邻近海域大型底栖动物群落结构和季节变化

本文以2009年8月-2010年6月在北黄海獐子岛海域4个季度航次调查的大型底栖动物资料为基础,分析了该海域大型底栖动物群落的结构和季节变化。结果表明,4个航次共采集了211种底栖动物,调查海域主要优势种为薄索足蛤(Thyasira tokunagai)、斑角吻沙蚕(Goniada maculata)、紫蛇尾(Ophiopholis mirabilis)、博氏双眼钩虾(Ampelisca bocki)和短角双眼钩虾(Ampelisca brevicornis),各季节的优势种组成有明显变化；运用聚类分析和MDS研究了其群落结构,将该区域大型底栖动物分为3个群落,即,群落I--位于调查区北部的美原双眼钩虾(Ampelisca miharaensis)-短角双眼钩虾(Ampelisca brevicornis)-斑角吻沙蚕群落,群落II--位于獐子岛邻近的紫蛇尾(Ophiopholis mirabilis)-日本倍棘蛇尾群落(Amphioplus japonicus),群落III--位于南部区域的薄索足蛤-浅水萨氏真蛇尾(Ophiura sarsii vadicola)群落,各群落有一定的季节变化；运用ABC曲线分析了4个季节群落受扰动情况,表明该海域环境良好,受扰动较小,夏季受扰动略大于其它季节。

Community Structure of Macrobenthos and Seasonal Variations in the Zhangzi Island Waters of the Northern Yellow Sea

Based on macrobenthic samples collected from 13 stations around Zhangzi Island in northern Yellow Sea with 4 cruises in August, November of 2009 and February, June of 2010, the community structure and seasonal variation of macrobenthos from the research area were analyzed with dominant species analysis, Bray-Curtis similarity cluster analysis, MDS ordination analyses, and ABC curves. The results show that, 211 macrobenthic species in total were identified from the research area; five dominent species were found, i.e., Thyasira tokunagai (Mollusca), Goniada maculate (Polychaeta), Ophiopholis mirabilis (Echinodermata), Ampelisca bocki (Crustacea), and Ampelisca brevicornis (Crustacea), the compositions of dominant species were different among seasons; three macrobenthic sub-communities were determined: I--Ampelisca miharaensis-Ampelisca brevicornis-Goniada maculata sub-community located in northern research area, II--Ophiopholis mirabilis-Amphioplus japonicus sub-community located near Zhangzi Island, III--Thyasira tokunagai-Ophiura sarsii vadicola sub-community located in southern research area, the structure of the three sub-communities changed seasonally; the environment of the area was good, the community was disturbed slightly, the disturbance in summer was slighter than those of the other seasons.