Population Ecology

Which contribute to a positive population growth?

• immigration

• positive birth rate

• emigration

• positive death rate

What type of factor has an increasing impact as the population size increases?

• density-independent

• density-dependent

• cohort effect

• survivorship factor

Which of the following are density dependent factors?

• competition for resources

• predation

• disease

• natural disasters

Which of the following are examples of a density independent factors?

• forest fire

• seasonal cycles

• storms

• disease

What type of growth model is shown in image A?

• Exponential

• Logistic

What type of growth model is shown in image B?

• Exponential

• Logistic

What point on the graph represents carrying capacity?

• a

• b

• c

• d

Which choice most closely approximates the deer population's carrying capacity based on the graph?

• 100

• 80

• 60

• 10

Which limiting factor would increase due to the number of individuals in a population?

• Unusual weather
• Natural disaster
• Births
• Disease

Which of the following is TRUE of predator/prey relationships?

• The amount of prey does not affect the number of predators.
• Herbivores are limited by the number of prey in an ecosystem.
• Humans are not considered predators.
• The number of predators is determined by available prey.