Lecture 11 Flashcards
1
Q
Density dependent factors
A
Become more important as the population size increases
1
Q
What are the 2 main types of growth limits?
A
Density dependent and density independent factors
2
Q
Density independent factors
A
Affect the population size regardless of density
3
Q
Carrying capacity
A
The maximum number of individuals of a species that can be supported by the available resources in a particular environment
4
Q
Inflection point
A
The point of fastest growth after which growth begins to slow
5
Q
What happens if a population exceeds its carrying capacity? i.e., overshoot
A
- A decrease in birth rates
- An increase in death rates
- Or both
6
Q
Allee effect
A
Positive density dependence; the growth or survival of a population increases as the population density increases
7
Q
Reasons Allee effect occurs:
A
- Finding mates
- Cooperative behaviours
- Predator satiation
- Resource availability
8
Q
What does logistic equation model?
A
- Density dependent population growth
- Commonly negative density dependence
- S-shaped curve
