Spatial distribution of temporal dynamics in anthropogenic fires in miombo savanna woodlands of Tanzania.

摘要: Anthropogenic uses of fire play a key role in regulating regimes African savannas. These fires contribute the highest proportion globally burned area, substantial biomass burning emissions and threaten maintenance enhancement carbon stocks. An understanding at local scales is required for estimation prediction contribution of these to global cycle management. We assessed spatio-temporal distribution miombo woodlands Tanzania, utilizing MODIS active product Landsat satellite images past ~40 years. Our results show that up 50.6% woodland area affected by each year. early late dry season peak wetter drier miombo, respectively, characterize annual season. Wetter areas have higher activity within shorter return intervals. The regime characterized small-sized fires, with ratio small than large frequency-size (β = 2.16 ± 0.04). Large-sized are rare, occur more frequently miombo. Both prevalence extents decreased decade. At scale, half has less 2 years intervals, which prevent occurrence intense fires. sizes spatial extent generally consistent across time, scale current analysis. Where traditional use restricted, reassessment management strategies may be required, if sustainability tree cover priority. In such cases, there need combine contemporary practices.