environmental synergies Flashcards
1
Q
why do small populations go extinct easily?
A
because of demographic instability and inbreeding
2
Q
what is the additive model?
A
the combined effect of stressors is equals the sum of their parts
3
Q
what is an antagonistic non-additive model?
A
the combined effect is less than the expected additive effect
4
Q
what is a synergistic non-additive model?
A
effect is greater than the expected additive effect
5
Q
example of an additive model?
A
nutrient pollution + pesicides on human health
6
Q
example of antagonistic interaction?
A
climate change increases invasive species and detritus processing but invasive species decreases detritus processing
7
Q
what are the characteristics of synergies?
A
- occur when stresses overlap
- often unpredictable
- sudden disrupions or abrupt shifts
- nonlinear behavior (feedback loops)
