Question 1

Define the term overexploitation.

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Question 2

Define the term invasive species.

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Question 3

A food chain is phytoplankton → zooplankton → sardine → tuna → shark. Suggest which organism is likely to have the highest concentration of mercury.

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Question 4

State one reason why human impacts on ecosystems are often described as rapid.

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Question 5

State one edge effect that can occur after habitat fragmentation.

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Question 6

State the two broad types of pollution.

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Question 7

State one pathway by which invasive species can be introduced to a new ecosystem.

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Question 8

State one way in which deforestation can reduce matter storage in an ecosystem.

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Question 9

State one reason why microplastics can enter food webs at low trophic levels.

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Question 10

Define the term overexploitation.

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Question 11

State one example of a natural resource that can be overexploited.

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Question 12

Define the term habitat fragmentation.

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Question 13

State one reason why microplastics are considered long-lasting pollutants.

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Question 14

Define the term pollution.

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Question 15

Define the term microplastics.

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Question 16

What is the main cause of species extinction worldwide?

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Question 17

Suggest two reasons why large predators are often vulnerable to overexploitation.

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Question 18

Outline one way plastic pollution can enter a marine food web.

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Question 19

Outline one reason why overexploitation can cause a population to collapse.

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Question 20

Outline how feedback loops are involved in alternate stable states and tipping points in ecosystems.

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Topic 2.6: Human Impacts Questions

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