The case of the Monarch butterflies

Biodiversity is a measure of:

• The total volume of calories consumer by animals

• The amount of pollination carried out by monarch butterflies

• The amount of nonliving factors within an ecosystem

• Species richness within an ecosystem OR Many different species within an ecosystem

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Which of the following statements support how monarch butterflies benefit the ecosystem?

• A. Monarchs help to pollinate a variety of plants in an ecosystem

• B. Monarchs migrate to forests in Mexico for the winter season

• C. Monarchs provide a food source for other animals in the ecosystem

• Both A and C

If milkweed plant populations decline, which of the following could occur:

• Monarch butterfly populations will increase

• Biodiversity will increase within ecosystems

• Monarch butterfly populations will decrease

• All of the above

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Changes to physical or biological parts of an ecosystem can affect populations

• True

• False

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If the monarch butterfly species was to disappear, which of the following may occur as a direct result of its extinction?

• A. Biodiversity within the ecosystem would be reduced

• B. Animals that feed on monarch butterflies would have to compete for other food sources in the environment

• C. All forests in Mexico will disappear

• Both A and B

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Which of the following actions can be taken to help protect and increase monarch butterfly populations?

• Plant more milkweed plants in the environment

• Protect butterfly reserve forests in Mexico

• Limit the use of insecticides/pesticides on plants

• All of the above

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