Unit 5.2 Threats to Biodiversity Notes

Open Ended

In what ways can human activities both positively and negatively affect biodiversity?

Multiple Choice

Which of the following is a negative impact humans can have on the environment?

• Planting trees in urban areas

• Reducing plastic use

• Polluting rivers with industrial waste

• Protecting endangered species

Multiple Choice

Which of the following best describes the difference between an endangered species and a threatened species?

• Endangered species are at serious risk of extinction, while threatened species are likely to become endangered soon.

• Endangered species are extinct, while threatened species are not.

• Endangered species have stable populations, while threatened species have declining populations.

• Endangered species are only found in zoos, while threatened species are found in the wild.

Multiple Select

Which of the following are common causes of biodiversity loss?

• Habitat change and loss

• Invasive species

• Pollution

• Overharvesting

Open Ended

Explain how habitat fragmentation can lead to a decline in biodiversity. Use information from the slides to support your answer.

Multiple Select

Invasive species contribute to biodiversity loss by:

• Outcompeting native species

• Pushing other species toward extinction

• Reproducing rapidly where they have no natural predators

• Increasing genetic diversity of native species

Drag and Drop

The introduction of a non-native, or ​

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species, like the Zebra mussel, is problematic because these species may ​

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with native species and reduce ​

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.

Drag these tiles and drop them in the correct blank above

invasive

compete

biodiversity

reproduce

Open Ended

Based on the invasion curve, why is prevention considered more effective and less costly than eradication or containment of invasive species?

Multiple Choice

Which of the following is NOT a way pollution can harm wildlife?

• By poisoning them

• By causing physical harm

• By providing nutrients

• By making the environment toxic

Multiple Choice

Which of the following species is an example of extinction due to overharvesting?

• Passenger pigeon

• Polar bear

• Coral reef

• Blue whale

Hotspot

Cod is a popular fish that many people like to eat. Because of overfishing, some cod populations have declined sharply. The diagram shows a maritime food web. Based on the information given in the food web, which three populations will be the first to increase when cod are overfished?

(CHOOSE 3 CORRECT ANSWERS)

Multiple Select

Select all the factors that contribute to biodiversity loss as described in the summary.

• Species diversity loss

• Genetic diversity loss

• Habitat diversity loss

• Increase in biodiversity

Open Ended

Describe the main purpose and impact of the Endangered Species Act (ESA) in protecting species at risk of extinction.

Multiple Choice

Which international agreement bans the international trade in body parts of endangered species?

• Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES, 1975)

• Convention on Biological Diversity (1992)

• World Wildlife Fund Treaty

• Kyoto Protocol

Open Ended

Explain how captive breeding programs and cloning contribute to the conservation of endangered species.

Multiple Select

Which of the following are goals of the World Wildlife Anti-Poaching Campaign?

• To stop the use of animal parts for medicine

• To prevent animals from being used as trinkets

• To discourage the use of animal skins as rugs

• To promote animal poaching

Open Ended

Describe how economic approaches such as debt-for-nature swaps and conservation concessions can help balance conservation with local economic interests.

Multiple Choice

Why are conservation biologists planning a 250-km long corridor in Australia, and how is it expected to help the southern cassowary?

• To enable the endangered southern cassowary to recover from population declines

• To increase tourism in the region

• To connect major cities for transportation

• To promote agricultural development

Open Ended

Reflecting on today's lesson, how do you think humans can both positively and negatively impact biodiversity?