This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
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 = 59˚C (might be F) *check*...
View Full Document
- Fall '09
- Grassland, Shrub, Overgrazing, mm dia, Mesquite biomass Mesq