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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。
From July to September in 2002, mollusks in 8 major mangrove areas of Leizhou peninsula were recorded, with 37 families and 110 species of molluscs recorded, and the molluscan fauna of each mangrove area had a higher geographical distribution Differences in distribution (Similarity less than 6 1 0%). The average biomass of mollusks in each mangrove area was 206 ind m2 or 106 g m2. The average biomass of the amphibian molluscs was 20 ind m2 or 147 g m2. The predominant species of arboreal shellfish were Hazel , Etc. The average biomass of the habitat was 1 97 Ind m2 or 1 0 06 g m2, with the dominant species being Beluga crab. The biomass was mainly related to the characteristics of sediment and forest community, the sediment was silt soil and high-density community biomass was low, the biomass was higher in sandy soil and lower density community, Mollusks in the outer margin of the forest have the highest biomass. Due to man-made transitional excavation and serious environmental pollution, the vast majority of mollusk germplasm resources are endangered, and the urgent need to strengthen protection.