深圳红树林区珠带拟蟹守螺的空间分布研究

Studies of the Distribution of Cerithidea cingulata (GNELIN) in the Mangrove Protective Area of Futian, Shenzhen

对深圳福田红树林区珠带拟蟹守螺在林外滩涂的分布及其与环境关系的研究结果表明:珠带拟蟹守螺主要分布在高潮线附近,离岸越远其数量越低;幼螺分布在离岸较远的滩涂,随生长,不断向近岸迁移;珠带拟蟹守螺对盐度的适应性很广;底质总有机碳含量并不影响螺的分布数量;底泥中砾石和砂的含量与螺的数量之间有明显的正相关关系,粉砂和粘土的含量与螺的分布数量之间有明显的负相关关系。

During December 1986 to December 1987, field investigations were carried out monthly on the distribution of an intertidal gastropod Cerithidea Cingulata in the beach outside the mangrove forest in Futian, Shenzhen, in association with some environmental factors. The results showed that the population of C. cingulata mainly distributed near the high tide shoreline. The larval snails appeared in the area far from the shore, and moved gradually towards the shore in the course of growth. The C. cingulata is euryhaline and its qantitative distribution is not affected by the salinity of interstitial water of the mud. The quantitative distribution of C. ningulata in that area showed significant negtive correlation with the total organic carbon, the content of silt and clay of the bed mud, and significant positivc correlation with the content of gravel and sand of the bed mud.