Please read the board!
Rubric and Lab sheet – important guides. This Thursday tutorial – Lab “retake”
Wildfire
The study of relationships between biotic and abiotic factors. Fire Succession Intermediate disturbance hypothesis Niche Habitat
Primary Succession Secondary succession
Fire wars Can fire ever be beneficial?
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 Can fire ever be beneficial? Armand Bayou prescribed burn 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.
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.