Population Ecology

Mr. Andersen discusses population ecology, focusing on factors affecting population growth, such as density-dependent and independent factors. He explains exponential and logistic growth models, K and r-selected species, and the importance of population size. The video also covers population calculations, dynamics, and survivorship curves, providing insights into species strategies.

What was the population of whooping cranes in the US by 1938?

• 10,000

• 15

• 100

• 1,000

Which of the following factors can decrease a population size?

• Emigration

• Immigration

• Births

• All of the above

What is the term for the maximum number of individuals an area can support?

• Intrinsic growth rate

• Carrying capacity

• Density

• Exponential growth

Which model describes a population that grows rapidly and then levels off?

• Exponential growth model

• Logistic growth model

• Cyclic growth model

• Linear growth model

What is a characteristic of K-selected species?

• Rapid population growth

• Population stabilizes at carrying capacity

• Little parental care

• Many offspring

How is population density defined?

• Growth rate of the population

• Carrying capacity

• Number of individuals per unit area

• Total number of individuals

What is the formula to calculate the change in population size?

• Births - Deaths + Immigration - Emigration

• Births + Deaths + Immigration + Emigration

• Births + Deaths - Immigration + Emigration

• Births - Deaths - Immigration + Emigration

Which type of survivorship curve is typical for humans?

• Type I

• Type IV

• Type II

• Type III

What is a characteristic of r-selected species?

• Stable population size

• Boom and bust population cycles

• Few offspring

• High parental care

Which species is an example of a predator-prey relationship with the Arctic hare?

• Whooping crane

• Canada lynx

• Sea turtle

• Songbird