Exam #4 W 4/23 in class (bring cheat sheet) Review T 4/22 at 5pm in PAI 3.02.
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Transcript of Exam #4 W 4/23 in class (bring cheat sheet) Review T 4/22 at 5pm in PAI 3.02.
![Page 1: Exam #4 W 4/23 in class (bring cheat sheet) Review T 4/22 at 5pm in PAI 3.02.](https://reader035.fdocuments.us/reader035/viewer/2022062713/56649f465503460f94c6858d/html5/thumbnails/1.jpg)
•Exam #4 W 4/23 in class(bring cheat sheet)
•Review T 4/22 at 5pm in PAI 3.02
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Ecology: We are all connected and interdependent
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CB 52.12
Carrying Capacity
exponential growth
stationary phase
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Wolves in Yellowstone National Park
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Yellowstone National Park
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The last wolves in Yellowstone (1920’s)
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Wolves commonly live in packs
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Social vs Solo
Packs can kill larger prey
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Packs give protection and ability to get more food, but also mean sharing food, reduced chance of reproduction, and increased chance of diseases.
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Wolves are very territorial and will kill intruders
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Wolves were re-introduced to Yellowstone in 1995
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Wolf relocation
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“hard” release:directly to new location
In Yellowstone used“soft” release:Kept in 1 acre pens to acclimate to new environment
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Wolves were re-introduced to Yellowstone in 1995
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http://www.forwolves.org/ralph/historical.html
Yellowstone area wolf packs 2004
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Wolf deaths 1995-2005
38 deaths= 33%
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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:
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Estimate millions of dollars in increased visitors
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Predator-predator interactions
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Predator-predator interactions
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CB 55.12
Yellowstone Grizzly Bear population increases
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Wolves are decreasing the elk population
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Benefits of decreasing herbivore populations
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Increased Riparian Habitat
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Fig 2
Increased Riparian Habitat
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Fig 2
Increased Riparian Habitat
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Fig 3
Increased Riparian Habitat
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Fig 5
Are wolves responsible?
year1998 1999 2000 2001 1998 1999 2000 2001
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Fig 6
Protection vs herbivory
gully depth vs browsing
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The reintroduction of wolves to Yellowstone NP has had numerous positive benefits.
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The reintroduction of wolves to Yellowstone NP has had numerous positive benefits:More food available for other carnivores
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Fig 3
The reintroduction of wolves to Yellowstone NP has had numerous positive benefits:Increased Riparian Habitat
![Page 34: Exam #4 W 4/23 in class (bring cheat sheet) Review T 4/22 at 5pm in PAI 3.02.](https://reader035.fdocuments.us/reader035/viewer/2022062713/56649f465503460f94c6858d/html5/thumbnails/34.jpg)
•Exam #4 W 4/23 in class(bring cheat sheet)
•Review T 4/22 at 5pm in PAI 3.02