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 17-30 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 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.

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.