Population growth Flashcards
When does a population experience exponential growth?
when population is in ideal conditions with unlimited resources
How does populations grow?
Through multiplication, not fixed time steps
Populations grow through:
Births and immigration
Populations decline through:
Deaths and immigration
Exponential growth model =
dN over dt = rN
N = ?
Population size
t = ?
Time
d = ?
A change
dN over dt = ?
change in a population per change in time
gives slope of growth curve at a given population size
r = ?
Per individual/per capita rate of population increase and can be different for each population
As a population grows…?
Resources deplete
K = ?
Carrying capacity of the environment
Logistic population growth model =
dN over dt = rN [(K-N) over K]
What fits logistic model well?
Simple laboratory systems of micro-organisms
