Fire cycle of the Canada’s boreal region and its potential response to global change

编号 zgly0001329127

文献类型 期刊论文

文献题名 Fire cycle of the Canada’s boreal region and its potential response to global change

母体文献 Journal of Forestry Research 

年卷期 2007年01期

年份 2007 

分类号 S762 

关键词 Boreal forest  Fire cycle  Global change  Spatial variability 

文摘内容 Interactions of fire cycle and plant species’ reproductive characteristics could determine vegetation distribution pattern of a landscape. In Canada’s boreal region, fire cycles before the Little Ice Age (c. 1850s) ranged from 30-130 years and 25-234 years afterwards until the settlement period (c. 1930s) when longer fire cycles occurred in response to climatic change and human interference. Analysis indi-cated that fire cycles were correlated with growing season (April-October) temperature and precipitation departure from the 1961-1990 nor-mal, varying by regions. Assuming that wildfires will respond to future warming similar to the manner during the past century, an assess-ment using climatic change scenarios CGCM1, CGCM2 and HadCM2 indicates fire cycles would divert to a range of 80-140 years in the west taiga shield, more than 700 years for the east boreal shield and east taiga shield, and 300-400 years for the boreal plains in 2050.