1. Please read the board!

2.  Rubric and Lab sheet – important guides.  This Thursday tutorial – Lab “retake”

3. Wildfire

4.  The study of relationships between biotic and abiotic factors.  Fire  Succession  Intermediate disturbance hypothesis  Niche  Habitat

5.  Primary Succession  Secondary succession

6.  Fire wars 17-30  Can fire ever be beneficial?

9.  1944 – US Forest Service  1988 – fires in Yellowstone shocked nation  1990 – fire policy change  Fire wars 53-1:03

13.  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

14.  Fire wars 17-30  Can fire ever be beneficial?  Armand Bayou prescribed burn Armand Bayou prescribed burn

15.  Returns nutrients to soil  Helps certain seeds germinate  Forest – clears underbrush /fuel  Prairie – kills trees  Light can reach soil  Help control pathogens/insects

17.  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

18.  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.

20.  Primary Succession  Secondary succession

21.  Range of tolerance  Intermediate disturbance hypothesis  Succession

22.  All things are interconnected.  Everything goes somewhere.  There’s no such thing as a free lunch.  Nature always bats last.