作　　者： ; ; ; (吴晓东）; (蔡俊欣）;

机构地区： 湛江海洋大学

出　　处： 《林业科技》 2004年第1期17-21,共5页

摘　　要： 20 0 2年 7～ 9月对雷州半岛 8个主要红树林区软体动物进行了清查 ,记录有 37科 1 1 0种软体动物 ,且各红树林区的软体动物区系组成存在较高的地理分布上的差异 (相似度均小于 6 1 0 % )。各红树林区的软体动物平均生物量为 2 0 6Ind m2 或 1 0 6 g m2 ;树栖软体动物平均生物量为 2 0Ind m2 或 1 4 7g m2 ,树栖贝类优势种类有黑口滨螺等 ;地栖平均生物量为 1 97Ind m2 或 1 0 0 6g m2 ,以珠带拟蟹守螺等为优势种。生物量的大小主要与底质和林区群落特征有关 ,底质为淤泥土壤和高密度的群落生物量较低 ,泥沙质土壤和较低密度的群落的生物量较高 ,同一群落类型以林外缘带的软体动物的生物量最高。由于人为过渡采挖和环境污染严重 ,绝大部分软体动物种质资源趋于濒危状态 ,急需加强保护。 The molluscs biodiversity of eight major mangrove areas in Leizhou Peninsula,the southmost tip of China's Mainland,were surveyed between July and September in 2002 The restlts showed that there were 37 family 110 species of molluscs living in the mangrove areas The faunas of the surveyed mangroves were highly different geographically(their similarities all less than 61%).The average molluscs biomass of the surveyed mangrove associations was 206?Ind /m 2 or 106 9?g/m 2,the mean tree dwell biomass was 20?Ind /m 2 or 14 7?g/m 2,usually dominated by Littoraria melanostoma,etc ,and the mean soil dwell biomass was 197?Ind /m 2 or 100 6?g/m 2,mostly dominated by Cerithidea cingulata and so on The biomass is highly related with soil type and the association′s characteristics,higher at low dense forest with sandy mud soil and lower at highly dense forest with silt mud soil,the highest at the outer edge of the association Because of the over-exploitation of nature molluscs resource and deteriorating environmental stress,the most of the molluscs genetic resource are endangered,and in-site habitat conservation is urgent

关 键 词： 雷州半岛 红树林区 软体动物 生物多样性 生物量 区系组成 地理分布 树栖 地栖 底质 群落特征

领　　域： [农业科学]