Geog 112: Guest Lecture

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dante01
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251546
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Geog 112: Guest Lecture
Updated:
2013-12-08 14:16:46
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  1. 3 Hypotheses for mass extinction in span of 400-1000 years
    • -73.37% of animals went extinct 10,000-12,000 years ago
    • 1. Massive Climate Change
    • 2. People (Hunters/tool development/colonization)
    • - blitzkrieg theory
    • -within a thousand years
    • 3. People traveling brought dogs with fleas---->disease
  2. Megafauna
    • -Direwolf
    • -Camel
    • -Mammoth
    • -Bison
    • -American Cheetah
    • -Ground Sloth
    • -Saber tooth
    • - American Lion
    • -Giant Beaver
    • -Dwarf pronghorn
    • -Giant Hutia
  3. Two places where realms are connected to the rest of
    • 1. Bering Strait
    • 2. Isthmus of Panama 

    -Realm slightly more than 1/2 width of Ethiopian realm and slightly less than 1/2 width of Paleartic realm
  4. Pronghorn
    • -safe fences at least 16in off the ground
    • -prairies don't have the majestic mountains, canyons, geysers that we as humans are attracted to 
    • -need huge migration path from Montana to Alaska
  5. Sage Grouse
    • -males have awesome mating display
    • -dance
  6. Black Bear
    • -Originated in Asia 
    • -endemic to North America
    • -no prominent shoulder hump like the grizzly
  7. Grizzly Bear
    • -North America
    • -In Europe too
    • -5ft when on all fours
    • -over 9ft when standing
    • -Alaskan version is much bigger
  8. Bears
    • 1. Polar Bear
    • 2. American Black Bear
    • 3. Grizzly Bear
  9. Big Cats
    • 1. Jaguarundi
    • -Texas, Florida
    • 2. Lynx (Canadian)
    • -snowshoe-shaped feet
    • -strong jaws
    • -blue eyes at birth --> golden eyes as adult
    • 3. Bobcat
    • -Endemic
    • 4. Jaguar
    • 5. Mountain Lion
  10. Wolf
    • -Apex Predator 
    • -main problem is with people
    • -keystone species
    • -controls elk population (too much elk = shitty aspen trees
    • -reintroduced to Yellowstone, doing well 
    • -elk and deer numbers plummeted 
    • -very endangered in N.America, not endangered in Asia and Europe
    • -Problem is that wolves don't stay in Yellowstone
    • -search for food and end up on cattle ranches 
    • -petition to keep gray wolves as endangered
  11. Wolf-Dog
    • -generally more aggressive than wolves 
    • -usually bred by humans, some not. 
    • -female wolf will go after male dog
  12. CA condort
    • -lack of feathers on head and neck is adaptation
    • -exposes head and neck to the sterilizing effects of UV light 
    • -purely scavenges
    • -1980s-about 20 left, now 300 worldwide concentrated in Grand canyon and LA (LA Zoo very involved in effort)
    • -condor parents often feed babies trash, don't enough space in bodies for other food
    • -Most are poisoned 
    • -humans do surgery on them, condorts wouldn't be alive w/out human intervention
    • -wingspan:9.5ft
    • -Birds of prey: females are usually larger than males, but condor males are larger than females
    • -huge range, not limited by distance
  13. Bull vs Bear
    • -Spanish caballeros dragged grizzlies into pit and made them fight bulls
    • -modern stock market terms: Bull-rear up (prices rising), Bear-swipe downwards(prices falling)
    • -betting of stock market
    • -people made bears and bulls fight and bet on them
  14. Emblematic but gone
    • 1. Grizzly bear
    • 2. Wolf (1924)
    • 3. Bison
    • 4. Jaguar (1860)
    • -All killed by humans
  15. Home range requirements
    • 1. Mountain Lion 
    • -50-500 mi2
    • 2. Lynx
    • -up to 100 mi2
    • 3. Wolf
    • -100-200 mi2
  16. Biological corridors
    • -Yellowstone to Yukon
    • -Algonquin To Adirondacks
    • -Multinational but Canada is way better at i than US
  17. Pluie
    • -real gray wolf
    • -radio collared (1991)
    • -wandered off protected area and legally killed
  18. Cost of wildlife roadways is evened out by
    • cost of cars crashing into wildlife
    • -dangerous and deadly
  19. Ranchers vs. wolves
    • -EPA has backed out of conversation because of controversy 
    • -issue of hunting
  20. Florida's exotics
    • -people get exotic animals as pets, then release them into national parks 
    • -Everglades should support a lot of small mammals, but numbers down 85% because of large invasive predators
    • 1. Asian swamp eel can breathe, eat, hunt and mate underwater and on land
    • -Walking sticks clone themselves-invasive species in CA

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