AP Bio Insta-Review Topic 8.4: Effect of Density of Populations

dN/dt

N

K

r

Decreases, then increases

Decreases, then remains constant

Increases, then decreases

Increases, then remains constant

N < K

N > K

N = K

Density dependent

Density independent

Density dependent

Density independent

-500

-50

50

500

Number of bacteria in a 10 mL of nutrient media

Number of elephants in 1 acre of savanna

Number of offspring in each generation

Number of fish in a square mile

Decreases

Increases

Stay the Same

As population size increases, growth rate decreases

As population size increases, growth rate increases

As population size increases, growth rate stays the same

As population size increases, growth rate decreases

As population size increases, growth rate increases

As population size increases, growth rate stays the same