please get out your outline on succession from yesterday and an extra piece of paper. please have...
TRANSCRIPT
Please get out your outline on succession from yesterday and an extra piece of paper.
Please have your permission slip and $10 on your desk.
Please read the board!
Wildfire
The study of relationships between biotic and abiotic factors.
Fire Succession Intermediate disturbance hypothesis Niche Habitat
Fire wars 17-30 Can fire ever be beneficial?
Returns nutrients to soil
Helps certain seeds germinate
Forest – clears underbrush /fuel
Prairie – kills trees Light can reach soil Help control
pathogens/insects
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
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
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.
Primary Succession Secondary succession
Range of tolerance
Intermediate disturbance hypothesis
Succession
All things are interconnected. Everything goes somewhere. There’s no such thing as a free lunch. Nature always bats last.