Mod C Unit 3 Lesson 3 Maintaining Biodiversity

Which of these support the statement that we must protect biodiversity because it affects the amount of resources we can use sustainably?

• Biodiversity decreases ecosystem productivity because different species use resources in different ways.

• A greater number of only a few species increases ecosystem resiliency and an ecosystem’s ability to resist disturbance.

• A variety of many different species increases ecosystem health by concentrating human-made toxins and poisons in water.

• Biodiversity maintains ecosystem health by recycling and storing nutrients, maintaining water quality, and stabilizing climate.

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Scientists collected data that shows that human changes to an ecosystem and growing population can decrease the capacity of the environment to support life . What kind of data could the scientists use to support this and convince politicians to protect their city’s resources?

• data that show how fish populations increased as dissolved oxygen in streams decreased

• data that show how forest size and diversity increased as the pH level of precipitation decreased

• data that show how trees became more afflicted by disease as levels of acid precipitation/pollution increased

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A politician is trying to remove a dam on a local river. Some people oppose the removal, because it will cost too much money. What is one argument the politician could use to get people to support the project anyway?

• Removing the dam will help form a new reservoir.

• Removing the dam will force the river to follow a controlled path.

• Removing the dam will help the water in the river flow at a more constant rate.

• Removing the dam will allow fish to reach their natural breeding grounds upstream of the dam site.

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Based on the table, which ecosystem is most likely to recover from a disturbance?

• Ecosystem 1

• Ecosystem 2

• Ecosystem 3

• Ecosystem 4

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When designing technology to solve environmental problems, environmental engineers must consider factors that limit the design. What are these factors called?

• big ideas

• constraints

• prototypes

• methodical thinking

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The map shows the migratory range of the Florida manatee.Conservation groups can use such data to support plans for protecting manatees from powerboats, which injure and kill manatees. According to the map, where would conservation groups want to concentrate their efforts by talking to boaters during the winter?

• Georgia and Florida

• Alabama and Florida

• Georgia and Alabama

• South Carolina and Florida

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Which of these describes an example of a keystone species that scientists should make efforts to protect?

• more than 1,000 newly hatched wood frog eggs in a forest ecosystem

• a gopher tortoise that provides a home to more than 300 different species of animals in its burrow

• a nonnative population of lionfish living on a coral reef in Florida that have no natural predators

• a population of mistletoe plants that are parasitic because they depend on other trees and plants in the ecosystem in order to get what they need to survive

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Humans depend on healthy ecosystems. Biodiversity is directly related to ecosystem health. What natural resources and ecosystem services do ecosystems provide for humans? Select three (3) that apply.

• clean air

• food

• recreation opportunities

• technology

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Strategies to maintain biodiversity include protecting habitats and individual species, reducing pollution, and preventing the spread of nonnative species. By protecting keystone species, conservationists hope to __________ species diversity in ecosystems.

• increase

• decrease

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Monitoring ecosystems allows scientists to help develop solutions to maintain biodiversity and ecosystem services. When should conservation groups collect data about ecosystem biodiversity and services? Select ALL that apply.

• before solution criteria and constraints are identified

• while the conservation solution is being implemented

• after the conservation solution is implemented

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