for2 - ForestResources Lecture8 ForestFires

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Forest Resources Lecture 8
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Forest Fires 3.5 to 4.5 million square km of forests and grassland burn  each year – the size of India and Pakistan combined Carbon and particulates are released when vegetation  burns 15% annual global carbon emissions from wildfires African wildfires, 2002
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Forest Fires Aids nutrient cycling and forest regrowth We have started using forest fires as a management tool –  prescribed burning Carbon fluxes are  short term
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Wildfires (Southern California, 2003)
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Savannah Landscape (South Africa), Fire-Maintained
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NJ Pine Barrens Pitch pines cones open when exposed to fire Suppressing fires in NJ Pine Barrens lead to more oak  growth
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Fire Frequency Some vegetation types require periodic fires savannahs, pine barrens, western NA pine forests Plants adapted to fire – seed  germination, enhanced regrowth Humans have altered fire frequency  in relatively undisturbed habitats Fire suppression – leads to change in  species, fuel build-up,  more intense fires
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for2 - ForestResources Lecture8 ForestFires

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