为了解广州南沙十四涌潮间带大型底栖动物的群落结构,于2007和2008年在十四涌潮间带选择光滩、海桑(SOnnErATIA)和茳芏(CyPEruS MAlACCEnSIS)3种生境进行大型底栖动物调查。对4个季度定量取样获得的大型底栖动物群落结构和差异进行比较分析,结果表明:从种数、平均生物量和丰度指数上看,茳芏生境最多,光滩第二,海桑生境最少;从大型底栖动物平均密度、种类多样性指数和均匀性指数上看,光滩最高,茳芏第二,海桑生境最低。AnOVA分析表明,3种生境间大型底栖动物的物种数、密度均呈显著差异,但生物量无显著差异。非度量多维标序(MdS)和聚类分析表明,冬季光滩和茳芏生境的大型底栖动物群落比较相似;3种生境的春季和夏季大型底栖动物群落比较相似。同时对3种生境间群落组成和数量差异的原因进行了探讨。In order to understand the community structure of macrofauna in the 14th Yong intertidal zone of Nansha,Guangzhou,an investigation was made at three different habitats,i.e.,bare tidal flat,Sonneratia habitat,and Cyperus malaccensis habitat from 2007 to 2008,with the seasonal variations of the macrofaunal community structure at the habitats compared and analyzed.The species number,average biomass,and species richness index (d) in four seasons were all the highest at C.malaccensis habitat,the second at bare tidal flat,and the lowest at Sonneratia habitat; while the average density,species diversity index (H′),and evenness index (J) were the highest at bare tidal flat,the second at C.malaccensis habitat,and the lowest at Sonneratia habitat.ANOVA analysis showed that there was a significant difference in the species number and density among the habitats,but no significant difference in the biomass.MDS and cluster analysis showed that in spring and summer,the macrofaunal community at the three habitats was similar,but in winter,only the macrofaunal community at bare tidal flat and C.malaccensis habitat was similar.The causes for the differences in species composition and quantity among the three habitats were discussed.国家自然科学基金重点资助项目(30930017
