Wildlife Responses to Human-Caused Stressors Flashcards
1
Q
5 categories of anthropogenic stressors on wildlife
A
- conversion of land and sea
- overexploitation through harvest
- invasive species (disease)
- pollution
- climate change
2
Q
responses to anthropogenic stressors
A
- move to a more appropriate abiotic environment
- locally adjust in place
- head towards extinction as vital rates decrease
3
Q
responses to anthropogenic stressors: move
A
- climate change-induced movements
- poleward and/or higher in elevation
4
Q
responses to anthropogenic stressors: adjust in place
A
when a species in going through a challenge it either moves, goes extinct, or deals with it
5
Q
two ways animals adjust/adapt to environmental change
A
- phenotypic plasticity
- evolution
6
Q
phenotypic plasticity
A
- ability of individuals to change phenotype in response to their environment
- occurs within individuals lifetime
7
Q
phenotypic plasticity examples
A
- leaves of aquatic plants
- red blood cell increase with elevation
8
Q
evolution
A
- change in genes over generations, facilitated by natural selection
- can occur fairly quickly
9
Q
evolution example
A
evolution in snowshoe hare coat color frequencies has genetic basis
10
Q
evolution or plasticity: ivory poaching and tuskless elephants
A
adaptive evolution
11
Q
evolution or plasticity: hot eggs and slower metabolism in finches
A
phenotypic plasticity
