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作 者 ：张齐兵

期 刊 ：植物生态学报 1993年 17卷 1期 页码：43-55

关键词：大兴安岭；植物群落；冻土环境；森林火灾；

Keywords:Daxinganling, Plant communities, Permafrost environment, Forest fire, TWINSPAN, DCA,

摘 要 ：本文运用国际较为先进的双向指示种分析(TWINSPAN)多元等级分划分类方法和无趋势对应分析(DCA)排序方法对大兴安岭阿木尔林区1987年特大森林火灾后的植物群落进行了研究。通过排序结果和冻土环境的多元分析，得出：DCA排序轴1代表了土壤岩性与地形的梯度而决定植物群落的分布；DCA排序轴2则反映了森林火烧的程度梯度，并通过冻土融化深度和浅层地温值的变化而影响植物群落的分布，运用相关回归分析方法，定量地找出了它们之间相互关系的回归方程。 据此，进而探讨了该地区森林火灾后冻土环境的变化对植物次生演替方向和进程的影响。

Abstract:The plant communities after the 1987′s turbulent forest fire in Amuer forest land of Mt. Daxinganling were studied by using the methods of TWINSPAN polythetic hierarchical divisive classification (TWINSPAN program) and DCA ordination(DECORANA program). By multiple regression analysis to interprete of the DCA ordination axis on permafrost environment factors, we conclude that DCA axis 1 reflects the gradient of soil characteristics and topography which determine the distribution of plant communities; DCA axis 2 is interpreted as the gradient of forest fire intensity, and it can causes changes of the depth to frozen soil and the shallow soil temperature of surface layer which are the significant factors for the distribution of plant communities Furthermore, we used the correlation and regression method in analysing the relationship between DCA axis 2 and permafrost environment factors, and as a result, a regression equation was produced. We also discussed the directions and stages of plant secondary succession under the influence of permafrost environment development based on the results of the above analysies.

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