Chapter 10: Population Dynamics

Question 1

Exponential Growth

Answer 1

Unlimited resources, new geographic range, favorable climate

Question 2

Logistic Growth

Answer 2

Approaches equilibrium, fluctuates around a max sustainable population size, carry capacity

Question 3

Population Fluctuations

Answer 3

Fluctuate around a mean or a growth curve, small or large fluctuations, sometimes explode, leading to an outbreak, can increase the risk of population extinction

Question 4

Population Cycles

Answer 4

Sometimes populations fluctuate in regular cycles

Question 5

Small Populations

Answer 5

Have increased risk of population extinction

Question 6

Effective Population Size

Answer 6

The number of individuals who can contribute offspring to the next generation

Question 7

What factors reduce the effective population size of a small population?

Answer 7

Genetic factors, demographic factors, environmental factors

Question 8

Risk from Genetic Factors

Answer 8

Genetic drift, inbreeding depression

Question 9

Risk from Demographic Factors

Answer 9

Allee effects, demographic stochasticity

Question 10

Demographic Stochasticity

Answer 10

Chance differences among individuals in reproduction and survival

Question 11

Allee Effects

Answer 11

Population growth decreases with decreasing density

Question 12

Environmental Stochasticity

Answer 12

Changes in population birth or death rates between years