林火灾变对生态系统的影响

THE EFFECT OF FOREST FIRE CATASTROPHE ON ECOSYSTEM

林火灾变是森林生态系统受到的最主要的灾变之一,为(?)系统的研究林火灾变对森林生态系统的影响奠定基础,文章从生物量、群落演替阶段和生态环境三个方面讨论了林火灾变对森林生态系统的影响。建立了衡量影响程度的数量指标,确定了进行定量研究的基本方法——以生物量的变化为量变,以演替阶段的变化为质变,由量变分析质变。论述了林火灾变与其它灾变间的关联——灾变群与灾变链问题。

Forest fire catastrophe is one of the most important catastrophes affecting forest ecosystem.In this paper,the effect of this catastrophe on forest ecosystem was discussed from three aspects——community succession stages,biomass and ecological environment.The quantity index used to measure the degree of this effect was established.The basic method of quantitative study was defined,that is,the change of biomass was regarded as quantitative change;the change of succession stages was regarded as qualitative change.The relation between forest fire catastrophe and other catastrophes——the problems of catastrophe group and catastrophe chain was discussed also.All these work lay a foundation for further studying the problems in this field.