厦门钟宅泥滩海洋线虫群落的种类组成及其多样性

Species Composition and Diversity of Marine Nematode Community on Intertidal Mudflat in Zhongzhai,Xiamen

1999年 2月和 1999年 5月在厦门钟宅泥滩 3个取样站取样 ,获得自由生活海洋线虫 4 8种 ,隶属于 3目 19科 4 1属 .这些海洋线虫在厦门潮间带均是首次记录 .主要优势种有变异毛咽线虫(Dorylaimopsis variabilis)、Viscosia sp.、吞咽线虫 (Daptonema sp1.)、囊咽线虫 (Sphaerolaimusbalticus)和 Thalassomonhystera sp.等五种 .海洋线虫的密度从较高潮区向较低潮区增加 .主成分分析和多维尺度分析均表明冬季和春季的海洋线虫种类组成有较大差异 .与台湾海峡海洋线虫比较 ,厦门钟宅泥滩海洋线虫种类较少 ,密度高 ,种类多样性指数值低 ,这与钟宅潮间带和台湾海峡沉积物中海洋线虫的食物源、生态因子影响等密切相关 .

Three sampling stations on mudflat in Zhongzhai Xiamen were designed to investigate free living marine nematode. 48 species of marine nematodes were collected during February and May sampling. They belong to 41 Genera, 19 Families and 3 Orders. All of them were first recorded on Xiamen intertidal zone. The dominant species were Dorylaimopsis variabilis , Viscosia sp., Daptonema sp1., Sphaerolaimus balticus and Thalassomonhystera sp. The densities of marine nematodes increased from higher mudflat to lower mudflat. There was obvious difference in species composition of marine nematodes between February and May according to cluster analysis and Multi Dimensional Scaling analysis. The species number and species diversity index of marine nematodes on intertidal mudflat in Xiamen Zhongzhai were respectively fewer and lower than those in Taiwan Strait, but the density on intertidal mudflat in Xiamen Zhongzhai was higher than those in Taiwan Strait. Which related to different effects of food and ecological factors between Xiamen Zhongzhai mudflat and Taiwan Strait.