论文部分内容阅读
基于相邻格子样方的野外取样方法,运用统计生态学的样方方差法、Greig-Smith格局分析法和Kershaw格局强度分析法对秦岭林区不同年龄阶段华山松种群的空间分布格局、格局规模、格局强度进行了研究。结果表明:华山松种群的空间分布格局随发育阶段由集群分布—随机分布—集群分布变化;华山松种群的格局规模约100m2,40年左右由于竞争、更新和扩展出现两个格局规模;该种群的格局强度变化缓慢,反映了种群扩散过程中较小的环境异质性和斑块间相对密度大的特点。
Based on the field sampling method of adjacent grid quadrats, the spatial distribution pattern and the pattern scale of Pinus armandi population in different age stages in Qinling forest were analyzed by using the method of quadratsquare deviation of statistic ecology, Greig-Smith pattern analysis and Kershaw pattern intensity analysis. , Pattern intensity was studied. The results showed that: the spatial distribution pattern of Pinus armandi population varied with the cluster distribution-random distribution-cluster distribution during the developmental stages; the pattern size of Pinus armandii population was about 100m2 and the size of two patterns appeared during the 40- The intensity of pattern changes slowly, reflecting the characteristics of smaller environmental heterogeneity and relative density between patches during the process of population dispersal.