10 Flashcards
Intrinsic rate of increase, r_max?
Birth rates are as high as possible or death rates are as low as possible.
Per-capita rate of increase of each population is likely?
Lower than r_max.
Exponential population growth condition? (2•)
•r does not change over time since r does not depend on the # of individuals in the population (density)
•Population growth is density independent
In exponential growth, what does a high r mean?
The population is increasing fast.
When increasing in the size of population do not affect r, then growth is?
Density independent.
Logistic Growth?
Density dependent and r changes since there are limited recourses.
If there is an increase in density, what does that mean for recourses?
Resources are more limited because there are more individuals in an area and competition would increase.
Fecundity?
of female offspring produced by each female
Survivorship?
Average proportion of offspring that survive to a particular age.
R-selected species?
High fecundity but low survivorship.
K-selected species?
Low fecundity but high survivorship.
Increase rate of reproduction can be related to?
Lower survivorship.
Char of organisms with high fecundity? (3•)
•Grow Quickly
•Reach sexual maturity at a young age
•Produce many small eggs or seeds
Char of organisms with high survivorship? (2•)
•Grow slowly
•Invest energy in defences and traits increasing competitive ability