大兴安岭北坡林火迹地森林景观格局的变化

The Effect of Fire Intensity on the Patterns of Forest Landscape in the North-slope of Da Hinggan Mountains

以黑龙江省图强林业局的育英和奋斗林场为研究区,从景观尺度上,以遥感和地理信息系统为技术手段,探讨和分析了1987年大兴安岭“5·6”特大森林火灾中,火烧强度对森林景观格局变化的影响。结果表明:火烧强度不同,导致种源、土壤理化性质等自然环境要素产生差异,并决定了火后森林景观更新与恢复的措施,进而影响森林景观格局的动态变化趋势。

In May 6,1987,a catastrophic forest fire took place in Da Hinggan Mountains,which affected more than 1.33×10~6hm^2 of natural forest and produced a heterogeneous mosaic of burn severities and islands of unburned vegetation across the landscape.Due to natural succession and anthropogenic disturbance,after about ten yeass,the spatial pattern of the landscape in this area has changed greatly.In this paper,a typical area was selected as a case study,which is the Tuqiang forest bureau,including two forestry farms,the influence of the fire intensity on the change of the forest landscape pattern was analyzed in a landscape scale.The result showed that:the difference of fire intensity induces the change of natural environment factors such as seed source,soil physical and chemical character,and correspondingly decides the renovating and resumptive measures of forest landscape after the fire,and further affects the dynamic change trend of forest landscape structure.The study aims at offering scientific gist for reasonable management and development of forest resources after fire.