Exam #2 F 6/27 in class (bring cheat sheet). Ecology: We are all connected and interdependent.
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Transcript of Exam #2 F 6/27 in class (bring cheat sheet). Ecology: We are all connected and interdependent.
CB 52.12Carrying Capacity
exponential growth
stationary phase
Carrying capacity can be limited by competition
63 mi
54 mi
•466 mi of roads •950 mi of backcountry trails•97 trailheads•287 backcountry campsites
Yellowstone NP
CB 55.18
Where do grizzly bears fit?
Are they important?
How much of our resources should we share with grizzly bears?
CB 55.19
National park
Buffer zone
In Costa Rica they have a two tiered park system:
National Parks- very restricted human activities
Buffer zones- some restrictions on human activities
CB 55.19
National park
Buffer zone
Developed vs Developing nations:
Should/would the US designate such large areas as parks?
63 mi
54 mi
•466 mi of roads •950 mi of backcountry trails•97 trailheads•287 backcountry campsites
Yellowstone NP
Packs give the ability to obtain more food, but also mean sharing food, reduced chance of reproduction, and increased chance of diseases.
“hard” release:directly to new location
In Yellowstone used“soft” release:Kept in 1 acre pens to acclimate to new environment
Currently about 300 wolves 2003- 137 sheep and 66 cattle = $32,000
2004- 209 sheep, 57 cattle, and 6 other animals = $70,000
The cost of wolves in Yellowstone NP:
Fig 6
The greatest difference has been in the deepest gullies, which are at the greatest risk to errosion.
The reintroduction of wolves to Yellowstone NP has had numerous positive benefits:More food available for other carnivores
Fig 3
The reintroduction of wolves to Yellowstone NP has had numerous positive benefits:Increased Riparian Habitat
Bears (1993) Ian Stirling et al., Weldon Owen Pty Ltd pg 231
Animal behavior is unpredictable and inexplicable