Ecosystem Dynamics and Human Impact

The video discusses how environmental changes, both natural and human-induced, affect ecosystems and organisms. It covers natural changes like weathering and ice ages, human impacts on climate, rapid changes such as storms and volcanic eruptions, and the processes of primary and secondary succession. The impact of invasive species and human activities on ecosystems is also explored, along with the concepts of extinction and conservation efforts. The video concludes with instructions for a unit test assignment.

What is one of the natural processes that can change the environment over time?

• Deforestation

• Weathering and erosion

• Mining

• Volcanic eruptions

During an ice age, what happens to the Earth's temperature?

• It becomes warmer than usual

• It remains constant

• It becomes colder than normal

• It fluctuates rapidly

What is primary succession?

• The recovery of an ecosystem after a disturbance

• The gradual development of an ecosystem on bare rock

• The introduction of invasive species

• The impact of human activities on ecosystems

Which of the following is an example of a rapid environmental change?

• Volcanic eruption

• Erosion

• Succession

• Climate change

What is secondary succession?

• The recovery of an ecosystem after a disturbance with soil present

• The impact of human activities on ecosystems

• The introduction of new species into an ecosystem

• The initial colonization of bare rock

How do invasive species affect native species?

• They provide additional food sources

• They compete for resources and space

• They help in pollination

• They increase biodiversity

What is one harmful effect of human activities on ecosystems?

• Reforestation

• Conservation efforts

• Pollution

• Habitat restoration

What is conservation?

• The introduction of invasive species

• The destruction of natural habitats

• The protection and restoration of ecosystems

• The mining of natural resources

What led to the extinction of the dodo bird?

• Climate change

• Natural disasters

• Overhunting and habitat destruction

• Invasive species

Why is conservation important?

• To increase pollution

• To prevent further extinctions

• To introduce new species

• To promote mining activities