Lecture 23: Population Ecology Flashcards
what does “N” represent?
population size
what does “B” represent?
number of births
what does “D” represent?
number of deaths
what does “m” represent?
per capita mortality rate
what does “b” represent?
per capita birth rate
what does “r” represent?
per capita growth rate, net change
if r is positive–>growing
if r is negative–>shrinking
if r=0–>at equilibrium
how do you find r?
b-m
what does “K” represent?
carrying capacity
Relationship of K and r
if r is negative–> n>K
if r is positive –> K>n
if r is 0–>K=n
logistic growth
growth rate slows as population reaches limit
semelparity
only reproduce once in your life
interoparity
reproduce multiple times
K-selection
very few kids so you can maximize the survival of each one
R-selection
high reproductive rates and produce many offspring with a low chance of survival
