摘要
1994年夏季(6月至9月)和冬季(1994年12月至1995年2月)对香港14片红树林的软体动物作了定性和定量调查。调查期间采到的软体动物已鉴定52种,其中腹足类45种,双壳类7种。采用Bray-Curtis相似系数和逐步形成分类系统的方法进行聚类分析。基本上可分为4组断面,分别以粗束拟蟹守螺(Cerithidea djadjariensis)、奥莱彩螺(Clithonoualaniensis)、沟纹笋光螺(Terebralia sulcata)和红树拟蟹守螺(Cerithidea rhizophorarum)为第一密度优势种。不同底质的红树林区软体动物组成有显著差异。污染可能是造成沙头角红树林区软体动物多样性低的重要环境因子。盐度和潮汐制约一些软体动物的垂直分布和水平分布,纵带滩栖螺(Batillaria zonalis)和多形滩栖螺(Batillariamultiformis)在红树林区海缘高密度栖息,分别高达120/m^2和240个/m^2。在淡水注入的红树林区常有广盐性软体动物栖息,如中国绿螂(Glauconme chinensis)。
Mollusca were investigated quantitatively and qualitatively at fourteen mangrove stands in Hong Kong in summer (June to September, 1994)and winter (December 1994 to February 1995). Among 52 species of mollusca identified, 45 were gastropods,7 were bivalves. Using Bray-Curtis Similarity Index and cluster analysis,all sampling sections were divided into four groups , which, starting from highest density, were Cerithidea djadjariensis、Tereloralia sulca-ta、Clithon oualaniensis and Cerithidea rhizophorarum. The species composition of mollusca were markedly difference in different sediment. Pollution might be an important factor for the low diversity index of mollusca at the Sha Tau Kok mangrove stand. Salinity was a limiting factor to the horizontal and vertical distribution of mollusca.
出处
《海洋科学集刊》
CAS
1997年第2期103-114,共12页
Studia Marina Sinica
关键词
红树林
软体动物
生态
香港
Mollusca
ecology
mangrove stand
Hong Kong
