The Fire Regime In Daxing'anling Region

Fire is a main disturbance factor in most forest ecosystems. Forest fires often destroy forest ecosystems and affect the vegetable and landscape pattern. Daxing'anling is the area with largest forest areas, and it's a region with severe fire in china. It will help us to understand the fire regime in the region through the analysis burned areas in past 25 years and its effects on the landscape.So it has an important influence to research fire regime for getting the fire and science fire management in ecosystems.The paper analyzed the fire regime and its effects on landscape bases on the NOAA/MODIS data, and fire statistics data for the period 1986-2010.The burned intensity was classified into light, moderate and severe fire. The affected factors were discussed, such meteorological factors and forest management policy. Fule types were classified by using a combining method of supervised and unsupervised classification methods. Make the fire degree distribute of vegetable in the fire degree. The NDVI in summer were compared during the study period, and the effects on the landscape.The results show that the fire numbers not fluctuated yearly largely, except 1987 and 2003 are years with large burned areas. The fire is not the same in the region, it is in north,east and northeast. The total fire area was 512,360,000 hm2, in the study period, and the light moderate and severe burned areas were 38.18% 43.66% and 18.16% respectively. Most burned areas were moderate fire.The fuel types in the region includes Larch forest and Mixed broadleaf-conifer forest, the most fire areas is moderate Mixed broadleaf-conifer forest, the lest fire areas is severe farmland.The burned areas were affected by precipitation not temperature. There are stage correlation with summer ndvi, fires and burned areas.In the study period, the landscape diversity increased and species richness increased.