Exploring the Importance of Biodiversity

The video discusses the interdependence of species within ecosystems and the impact of human activities on biodiversity. It highlights the consequences of species extinction, using the example of wolves in the U.S., and explains how human actions like deforestation and climate change threaten ecosystems. The video emphasizes the importance of healthy ecosystems for human survival and suggests that humans can reverse some damage by changing behaviors and restoring biodiversity.

How many different species of plants and animals are estimated to exist on Earth today?

• About eight million

• About ten million

• About five million

• About one million

What was the consequence of the near extinction of gray wolves in the U.S.?

• Decrease in beaver populations

• Increase in riverbank erosion

• All of the above

• Decrease in deer populations

What can happen in ecosystems when a few species go extinct?

• Major disruptions

• Minor disruptions

• Complete ecosystem collapse

• No effect

What is a direct consequence of overfishing on sea lions?

• Increased food availability

• Decreased competition

• Harder to find food

• More habitat space

How does deforestation affect biodiversity?

• Increases plant growth

• Reduces species interdependence

• Enhances ecosystem stability

• Affects multiple species

What are the long-term effects of altered ecosystems due to climate change?

• Thousands of years to recover

• Quick recovery

• No significant effects

• Possible extinction

Why is it crucial for humans to maintain healthy ecosystems?

• For education

• For economic benefits only

• For entertainment

• For survival needs

What positive outcome followed the reintroduction of wolves to Yellowstone?

• Restabilization of riverbanks

• Increased deer populations

• Decreased plant growth

• None of the above

How can humans help recover damaged ecosystems?

• Taking action and changing behavior

• Reducing conservation efforts

• Continuing current practices

• Ignoring climate change

What is the potential benefit of protecting biodiversity quickly?

• Reducing human population

• Making the world an easier place to call home

• Increasing pollution levels

• Making the world harder to live in