Grade 12 Skills Assessment 3 Ecology

Density-independent regulation of populations can be affected by factors that affect birth and death rates, like competition for resources.

• True

• False

A scientist is studying a population of coyotes in an area undergoing development and building of new homes. He begins by surveying the 400 square mile plot of land he is studying. He counted 600 coyotes at the start of the survey. He continues to survey the population for one year; using the data he collected over the year, he calculates the per capita birth rate to be 0.17 and the per capita death rate to be 0.22.

How many coyotes died during the study?

• 132

• 150

• 102

• 10

A scientist is studying a population of coyotes in an area undergoing development and building of new homes. He begins by surveying the 400 square mile plot of land he is studying. He counted 600 coyotes at the start of the survey. He continues to survey the population for one year; using the data he collected over the year, he calculates the per capita birth rate to be 0.17 and the per capita death rate to be 0.22.

How many coyotes were born during the study?

• 102

• 160

• 10

• 135

This is a group of individuals of the same species living in the same area.

• a. Community

• b. Species

• c. Population

• d. Biome

The graph represents...

• a. An exponential growth model

• b. A logistic growth model

• c. A Type I survivorship curve

• d. A Type II survivorship curve

Which type of survivorship curve is represented by the graph?

• a. Type I

• b. Type II

• c. Type III

• d. Type IV

A scientist is studying a population of coyotes in an area undergoing development and building of new homes. He begins by surveying the 400 square mile plot of land he is studying. He counted 600 coyotes at the start of the survey. He continues to survey the population for one year; using the data he collected over the year, he calculates the per capita birth rate to be 0.17 and the per capita death rate to be 0.22.

What is the per capita growth rate of the coyote population?

• 0.05

• -0.05

• 0.4

• 0.01

A scientist is studying a population of coyotes in an area undergoing development and building of new homes. He begins by surveying the 400 square mile plot of land he is studying. He counted 600 coyotes at the start of the survey. He continues to survey the population for one year; using the data he collected over the year, he calculates the per capita birth rate to be 0.17 and the per capita death rate to be 0.22.

Let’s say in two years, the scientist comes back to analyze the coyote population to find that it has stabilized at 500 individuals. Using this data he calculates the Rmax to be 0.27. With urbanization, coyotes have been found to be adapted to city living. Now that the construction and removal of the initial habitat is over, the scientist suspects that the remaining coyotes will roam the newly developed city, allowing them to expand their habitat. What will the population size of the coyote be one year from this point if the urbanization increased the carrying capacity to 900? Assume Rmax does not change.

• 560

• 500

• 50

• 650