Population Ecology 1

1. At zero population growth:

B=d

B>d

B

R>0

None of the responses are correct

2. When r is a negative number, the population size:

Increases

Decreases

Is stable

May increase or decrease, depending on K

May increase or decrease, depending on i

3. As N approaches K for a certain population, which of the following is predicted by the logistic equation?

The growth rate will not change

The growth rate will approach zero

The population will increase exponentially

The carrying capacity of the environment will increase

4. Plotting rmax would show the maximum exponential growth rate of the population

True

False

5. Logistic growth of a population is represented by dN/dt =

RN/K

RN

RN((K-N)/K))

RN((N-K)/K))

6. The logistic equation:

Models a J-shaped curve

Takes into account the carrying capacity of the environment

Shows continued exponential growth

Would characterize the uncontrolled growth of a population

Models a K-shaped growth curve

7. In the logisitc equation dN/dt = rN, ((K-N)/K)), r is a measure of the population's intrinsic rate of increase. It is determined by which of the following?

Birth rate

Death rate

Density

Both A and B are correct

A, B and C are correct

8. When considering the logistic equation, dN/dt = rN[(K-N)/K], the portion which takes into account the carrying capacity is rN

True

False

9. When the size of a population generally exceeds K, it will typically:

Rapidly increase

Slowly increase

Slowly decrease

Rapidly decrease

Stabilize

10. The growth rate of a population is expressed as:

B-d

I-e

K-N

DN/r

(K-N)/K

11. All of the following statements about the logistic model of a population growth are correct EXCEPT:

It fits an S-shaped curve

It incorporates the concept of carrying capacity

It describes population density shifts over time

It accurately predicts the growth of most populations

It predicts an eventual state in which birth rates equal death rates

12. Exponential growth of a population is represented by dN/dt =