9.2 Flashcards
Growth related to death, birth, immigration, and emigration.
Growth- B+I > D+E
Decay- B+I < D+E
Logistic Graph
Population raises over time (growth peaking at 1/2 K) until carrying capacity is reached.
Exponential Graph
Population increases exponentially and infinitely over time.
N
Population Size
N0
Initial Population Size
r
Growth rate per capita
dN/dt
Growth Rate
K
Carrying Capacity
t
Time
Density Dependent Factor
Factors that affect population size based on population density. For example disease.
Density Independent Factor
Factors that affect population regardless of population density. For example weather.
How does a Logistic Graph change when r is increased/decreased?
Increase- Reaches Carrying capacity faster