The study of relationships between biotic and abiotic factors.
Fire Succession Intermediate disturbance hypothesis Niche Habitat
1944 – US Forest Service
1988 – fires in Yellowstone shocked nation
1990 – fire policy change
Fire wars 53-1:03
Extinguish arson Manage lightning strikes Protect people Prescribed burns used to reduce wildfire
intensity and to take advantage of fire’s benefits to prairies/forests
Fire wars 17-30 Can fire ever be beneficial?
Armand Bayou prescribed burn
Returns nutrients to soil
Helps certain seeds germinate
Forest – clears underbrush /fuel
Prairie – kills trees Light can reach soil Help control
pathogens/insects
Yarnell Hill fire AZ (19 hot shots killed; lightning strike)
Yosemite National Park (campfire)
Perfect storm?◦ Accumulated fuel ◦ More people living in
remote areas◦ Climate change and
drought◦ Crown fires are more
intense than ground fires
Range of chemical or physical conditions that must be maintained for populations of a particular species to stay alive and grow, develop, and function normally.
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