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Unformatted text preview: What shrubs? o Sprouter or non-sprouter? o & how old/large are they? Can fire kill a sprouter? o if it is small/young yes (not well developed crown) Mesquite and Fire: Fire killed 67% of 6-12 month old seedlings Fire killed 60% of seedlings less than 13 mm dia (1/2 inch) Fire killed 20% of seedlings 25-51 mm dia (1-2inch) Fire killed 11% of seedlings greater than 130 mm dia Interaction between fire and grazing: Fire requires mostly fine fuel Grazing removes fine fuel Thus, overgrazing reduced fire frequency So o Grazing: less grass, more shrubs o Less grass, less fire, more shrubs o Overgrazed areas help shrubs-Picture of flood plain E. New Mexico, big cotton wood tree dead, no leaves, global warming-Average global temp = 59C (might be F) *check*...
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- Fall '09