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长江口泥螺种群夏季的空间格局分析
引用本文:叶属峰,陆健健.长江口泥螺种群夏季的空间格局分析[J].动物学研究,2001,22(2):131-136.
作者姓名:叶属峰  陆健健
作者单位:华东师范大学
基金项目:河口海岸国家重点实验室 99年度开放基金资助项目
摘    要:2000年5-6月对长江口南岸边滩和崇明岛北面滩涂泥螺Bullacta exarata (Philippi,1848)]种群进行了调查,目前长江口地区泥螺种群广泛分布于朝阳农场以南的南汇边滩,杭州湾北岸滩涂,崇明岛(牛棚港至捕鱼港)及长兴岛北面滩涂,九段沙中下沙高潮带下缘至低潮带上缘光滩带,分别采用Taylor幂法则,Iwao聚集格局回归分析法及Miorisita指数公式计算和统计分析,结果表明,长江口8个样点间泥螺种群密度差异极显著,其种群空间格局上属于聚集型负二项分布。其结果主要是由滩涂围垦。环境污染以及岛屿边滩之间不同的自然条件三者综合作用所致。

关 键 词:泥螺  种群  空间格局  长江河口  夏季
文章编号:0254-5853(2001)02-0131-06

Analysis on the Spatial Distribution of Bullacta exarata (Mollusca:Gastropoda:Atyidae) Population in Yangtze River Estuary,China
YE Shu-feng,LU Jian-Jian.Analysis on the Spatial Distribution of Bullacta exarata (Mollusca:Gastropoda:Atyidae) Population in Yangtze River Estuary,China[J].Zoological Research,2001,22(2):131-136.
Authors:YE Shu-feng  LU Jian-Jian
Abstract:Bullacta exarata (Philippi,1848) is a favorite seafood and a tidal and economic seashell with high nutrition and edible value in South China. It can be found in the intertidal flats in China,Japan and Korean along the coasts of West Pacific Ocean. B.exarata was one important biological resource which played an important role in the food chain of the tidal flat ecosystem as a consumer. Since late 1990s,the population ecology and toxicology of B.exarata had been partly studied along the coasts in Zhejiang,China,however,the spatial distribution had never been analyzed. Moreover,B.exarata had never been reported again up to now in the Yangtze River Estuary although it was first recorded formally in late 1980s. B.exarata population in the Nanhui tidal flat and North Chongming Island in the Yangtze River Estuary had been investigated and analyzed by Taylor'  power law,Iwao' s patch regression and Morisita index from May to June,2000. The results indicated that the B.exarata population distributed widely between the supratidal zone and subtidal zone of the intertidal flats from south Chaoyang Farm to Luchao Port in Nanhui tidal flat and in North Hangzhou Bay,from Niupenggang Port to Puyu Port in North Chongming Island,in North Changxing Island,Mid- and sub-Kiuduansha shoal in the Yangtze River Estuary. It was shown that the natural B.exarata population distributed extensively with clumped and negative binomial distribution [Morisita index (I)=2.61,P<0.01] theoretically. The regression equations of Taylor power law and Iwao' s patch regression were lnS2=-0.7472+1.3484 ln (r2=0.8132,P<0.01,n=8) and =-1.005+1.0766x (r2=0.9936,P<0.01,n=8) respectively. The population densities at 8 sample sites in the Yangtze River Estuary (D7>D6>CPB>DZB>CYN>DZN>CNB>CP) were greatly different significantly by the analysis of variance [ANOVA,F=42.52>F0.01(7,32)=3.26,P<0.01],which were resulted obviously from human activities,including land reclamation of tidal flats and environmental pollution,and different natural conditions between island and tidal flats.
Keywords:Bullacta exarata  Population  Spatial distribution  Yangtze River Estuary
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