应用最优分割法划分森林群落演替阶段的研究

本文以闽北山区自然状态下马尾松群落的进展演替过程为代表，讨论了定量划分群落演替阶段的方法。首先从分析树种关联、确定演替种组入手，重构其群落的演替系列，在此基础上采用有序样本的最优分割法将演替过程划分成五个演替阶段，即1．马尾松纯林阶段；2．马尾松、枢木、苦槠群落阶段：3．亮叶腊梅、马尾松、米槠群落阶段；4．米槠、黄瑞木、青冈群落阶段；5．少叶黄杞、细柄阿丁枫、米槠群落阶段。划分结果较真实地反映了马尾松群落向中生性稳定群落的发展过程，克服了主观判断划分方法的缺陷，在定量的水平上处理群落演替阶段的划分问题。

STUDY ON DIVIDING THE SUCCESSIONAL STAGES OF FOREST COMMUNITIES WITH DIVISION METHOD OF OPTIMIZATION

Based on the mathmatical methods and computer technology, the paper deal with the succession of Pinus massoniana communities on the natural condition in the mountains of northern Fujian Province, China, based on samples from 82 10×10m2 plots and 320 2×2m2 plots. Successional stages of all species in the area were divided into three groups, failing, transition and progressing according to their species association coefficients of X2 statistics. The sere was reconstructed and the five stages were defined from the result of the relative important value of the three groups with the division method of optimization.