【摘要】 根据2009年11月至2010年8月在山东宁津附近海域进行4个季度月航次调查所得大型底栖动物采泥资料,运用优势度指数、物种多样性指数及Cluster聚类和MDS排序等方法,分析了该海域的大型底栖动物群落特征和季节变化。结果表明:4个航次在底泥样品中共鉴定大型底栖生物11门159种,其中,多毛类动物73种,是主要的优势类群,甲壳动物39种,软体动物25种,棘皮动物9种,其他类群共13种。主要优势种有拟特须虫、丝异蚓虫、索沙蚕、轮双眼钩虾等。宁津邻近海域年平均生物量和丰度分别为9.144g/m~2和233.90ind./m~2,均较低且存在季节性差异。丰富度指数(D)、均匀度指数(J)和多样性指数(H′)的年平均值分别为2.436、0.800和2.924,次级生产力较低,平均值仅为1.903g(AFDW)/(m~2·a)。聚类分析结果表明,秋、春航次群落分布格局均包含近岸群落和远岸群落,但各群落间界线不明显,群落结构受扰动情况不明显。更多还原

【Abstract】 Based on the investigation data of macrobenthic samples collected from coastal waters off Ningjin, Shandong, in the Yellow Sea, in four seasonal cruises in November 2009(autumn), February 2010(winter), May 2010(spring), and August 2010(summer). To understand the ecological characteristics and seasonal variation of the macrobenthic community, several indices and analytical methods were adopted, including dominance index, diversity index, cluster analysis, and MDS(non-metric multi-dimensional scaling) ordination analysis. The results show that there were 159 macrobenthic species identified, of which 73 belonged to Polychaeta, 39 to Crustacea, 25 to Mollusca, 9 to Echinodermata, and the rest 13 species were other benthic groups. Paralacydonia paradoxa, Heteromastus filiforms, Lumbrineris sp., and Ampelisca cyclops were the most dominant species. The average values of biomass and abundance were 9.144 g/m~2 and 233.90 ind./m~2, respectively. The average values of diversity index, richness index, evenness index were 2.924, 2.436, and 0.800, respectively. The average values of secondary production was 1.903 g(AFDW)/(m~2·a). The macrobenthic community of the waters off Ningjin included both coastal and off-shore communities; however, the boundaries between them were indistinct.更多还原