知识与财富的链接
综合2000、2004年的调查结果,徐闻珊瑚礁自然保护区内有造礁石珊瑚12科42种,而保护区的核心区、缓冲区和试验区内珊瑚礁低潮带至潮下带上部的8个断面10个站的大型底栖生物有8类45科101种,其中大多数种类属于印度—太平洋热带区系。优势类群是软体动物和节肢动物,底栖生物的平均生物量、栖息密度和多样性指数分别是1043.37g/m2、692.37个/m2和5.5228。位于保护区南部核心区的断面Ⅰ和Ⅱ有着最高的多样性(5.1389和5.0077)和均匀度(0.9470和0.9286),而其他分属核心区、缓冲区和试验区的6个断面的多样性指数和均匀度指数差异不大。总体上看,造礁石珊瑚和珊瑚礁的存在为其他底栖生物提供了良好的生态环境,从而丰富了本区底栖生物的种类组成和数量。
8 sections and 10 sites separately dispersed from lower-tidal zone to subtidal zone in the focused area, buffer area and experiment area of Xuwen coral reef conservation are selected in 2000～2004. 12 families and 42 species of scleractinian corals are found there, as well as 8 groups, 45 families and 101 species of associated organism. Most species belong to Indian-West Pacific tropical fauna. The dominant groups are Mollusca and Annelida. The average biomass, density and diversity of macrobenthos were 1 043.37 g/m2,692.37 Ind/m2 and 5.5228 respectively. The sections of Ⅰ and Ⅱ, which lie in the focused area of South Xuwen coral reef conservation, have the highest diversity(5.1389 and 5.0077) and homogeneity(0.9470 and 0.9286). But the diversity and homogeneity index have little difference in other 6 sections lying in the focused, buffer and experiment areas. The study shows that the existence of scleractinian corals provides a good ecological environment for the other macrobenthos and makes composition of species and quantity in this region more rich and varied.
