Slideshow 6

Question 1

What is basic population growth with unlimited resources

Answer 1

(exponential growth model

Question 2

What is basic population growth with limited resources

Answer 2

(the logistic growth model

Question 3

What is the formula for an open population

Answer 3

P(t)=P0 +(B−D)+(I−E)

Question 4

What is the formula for an closed population

Answer 4

P(t)=P0 +(B−D)
dP/dt=B(t)−D(t)

Question 5

What is the formula for exponential growth

Answer 5

dN/dt = rN

Question 6

What 2 factors are accounted for in logistic population growth

Answer 6

1. Depletion of resources
2. Direct negative effects of high population density
   (accumulation of waste / aggression between individuals)

Question 7

What is DENSITY DEPENDENCE

Answer 7

.’density dependence is some (non-constant) functional relationship between the per
capita rate of population change and population density, possibly involving lags”

Question 8

Logistic Population growth

Answer 8

P(t)= K/(K-N0) e^-rt + N0

​

Question 9

What are the 4 assumptions of logistic population growth

Answer 9

1. It is assumed that the per capita growth rate is a linear function of N
   (population size)
2. It is assumed that population growth rate responds instantly to changes in N
   (i.e. no time lags)
3. It is assumed that the external environment has no influence on the
   Rate of population growth
4. It is assumed that all individuals in the population are equal
   (there are no effects of individual age or size)