Ecology Review

Which of the following would MOST likely cause an increase in the number of woodpeakers in an ecosystem?

• Destroying all dead trees and stumps

• Building a road around a small forest

• Creating new tree growth in the nearby forest

• draining a seasonal pond

Which changes will most likely have a positive effect on an ecosystem?

• Adding a freshwater source

• Building a new housing development

• A forest fire

• A rain storm

What is a keystone species?

• A keystone species is a plant or animal species that plays a unique and crucial role in the way that an ecosystem functions.

• A keystone species is a species that is at the bottom of the food pyramid.

• A keystone species is a plant or animal species that has nothing to do with an ecosystem.

• I have no clue....We talked about keystone species???

Which of the following is a Keystone species?

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Which of the following is a Keystone species?

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What is carrying capacity?

• Smallest number of individuals in a species that an environment can support long term.

• Largest number of individuals in a species that an environment can support long term.

• Smallest number of individuals in a species that an environment can support short term.

• Largest number of individuals in a species that an environment can support short term.

A wildfire has wiped out an entire meadow and has reduced the amount of grasses that the mule deer feed on. How might the reduced amount of grass MOST likely affect the deer population?

• The population will adapt to ground dwelling.

• The population will increase as predators move out of the region

• The population will decrease due to lack of resources.

• The population will stabilize when it moves to another region.

Which of the following is the MOST common way a human contributes to the extinction of organisms?

• farming

• bulldozing a meadow

• using pesticides on crops

• introducing a new water source