Ecosystem and Population Dynamics

Over the course of a year, a population of 25 penguins gained 5 penguins through births and lost 3 penguins to death. In addition, 10 adult penguins moved into the population through immigration and 6 adult penguins moved out of the population through emigration. What is the yearly growth rate of this population?

• 19

• 8

• 2

• 6

Tags

NGSS.MS-LS2-1

Which of the following would result from the expansion of a species into a new habitat with no predators and evenly spaced resources? Select ALL correct answers.

• logistic growth

• uniform dispersion

• exponential growth

• Type III relationship

• partial relief from density-dependent limiting factors

Tags

NGSS.MS-LS2-4

What type of interaction is most responsible for energy transfer in food chain?

• Competition

• Mutualism

• Parasitism

• Predation

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A non-native species moves into three niches that were once occupied by three different native species and outcompete the native species, producing larger population numbers than the three native species combined. What happens to the biodiversity of an ecosystem?

• Biodiversity increases because the number of individuals increases.

• Biodiversity decreases because only native species count toward biodiversity in an area.

• Biodiversity remains the same.

• Biodiversity decreases because the number of species decreases.

Tags

NGSS.HS-LS4-5

A scientist counted 200 individual deer in an area of 10 square kilometers. What is the population density?

• 20 deer per square kilometer

• 10 deer per square kilometer

• 2 deer per square kilometer

• 200 deer per square kilometer

Which method allows ecologists to estimate the population of a species that is motile (moves around)?

• Quadrats

• Air photos

• Mark-recapture

• GPS collars

Predict the conditions that may occur when a population is an exponential growth. Choose ALL correct answers.

• Birth rate is greater than death

• Birth rate is less than death rate

• Immigration rate is greater than emigration rate

• Immigration rate is less than emigration rate

Tags

NGSS.HS-LS2-2

NGSS.HS-LS2-6

Using the graph provided, indicate where logistical growth takes place.

• Between A and B

• Between B and C

• Between A and C

• At A only

Tags

NGSS.HS-LS2-1

Where does exponential growth take place?

• Between A and B

• Between B and C

• Between A and C

• At A only

Tags

NGSS.MS-LS2-1

Where do we find the most competition?

• A

• B

• C

• It is the same through out

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2