黑石顶自然保护区森林次生演替中优势种群与生态因子的关联度分析

ANALYSIS OF THE RELATEDNESS BETWEEN DOMINANT POPULATIONS AND ECOLOGICAL FACTORS IN SECONDARY SUCCESSION OF FOREST COMMUNITIES IN HEISHIDING NATURE RESERVE

摘要:

用灰色关联度分析对黑石顶森林次生演替过程中优势种群的重要值与环境因子的关联性进行分析。结果表明先锋种马尾松、杉木和荷术与环境因子的关联度受群落透光度的影响最大，阳生性种鸭脚木、泡花树、罗浮柿和腺叶山矾与各环境因子的关联度差别不大，中生性种小叶胭脂、硬叶稠、短花序桶、陈氏钓樟和黄果厚壳桂与环境因子的关联度受物种丰富度和群落密度的影响最大，而中生性种粘木和阿丁枫与群落透光度的关联度最大。环境因子对演替各阶段优势种群的影响由强到弱的顺序为群落透光度＞物种丰富度、群落密度＞土壤条件，在各优势种群受环境因子的综合影响中，中生性种受影响相对较大。

Abstract:

Relatedness of importance values of dominant populations to the ecologicalfactors in secondary succession of forest communities in Heishiding NatureReserve, Guangdong Province, was analyzed by using relatedness degree of the gray systemtheory. The results showed that pioneer species, Pinus massoniana, Cunninghamia lanceolataand Schima superba, were mainly affected by transmittance in the communities. Otherheliophytes such as Schefflera octophylla, Meliosma fordii, Diospyros morrisiana and Symplocos adenophylla were less affected by the environmental factors The mesophytes， Artocarpus styracifolius，Lithocarpus fohangwa Machilus breviflora，Lindera chunii and Cryptocarya concinna，were mainly afected by the richness of species and density of the communities， while mesophytes such as lxonanthes chinensis and Altingia chinensis were mainly affected by transmittance in the communities．The influences of the environmenta1 factors or fifteen dominant populations in descending order were transmittance in communities，richness of species，density of communities and conditions of soil. Comprehensive influence of all environmental factors appeared greatly on the mesophytes as compared to other species．