Homework SourseMultiple choice questions Landes theoretical work contribute
Multiple choice questions:
Lande’s theoretical work contributed to the listing of the northern spotted owl as a threatened species in the United States. Which threat to the owl did Lande’s work identify?
| When wolves were restored to Yellowstone National Park, |
| elk foraging behavior changed. |
| beaver populations declined. |
| there was a reduction in the recruitment of aspen and cottonwood. |
| willow populations increased. |
Solution
A). Beaver population declined .
B) Demographic stochasticity , this source of extinction pressure raised from chances events in the survival & reproductive success of a certain group of individuals.
