Ecosystem Disturbance and Resilience Concepts

In module eight, the video discusses ecosystem resistance and resilience, highlighting how ecosystems respond to disturbances. The Hubbard Brook ecosystem study is examined, emphasizing the role of plants in nutrient cycles. The intermediate disturbance hypothesis is explored, showing how species diversity is affected by disturbance levels. The module concludes with a summary of energy and matter movement and responses to disturbances.

What is the primary focus of Module 8?

• Ecosystem services

• Ecosystem resistance and resilience

• Climate change impacts

• Biodiversity conservation

How does an ecosystem with resistance respond to disturbances?

• It becomes more diverse

• It collapses completely

• It withstands disturbances with minimal changes

• It takes a long time to recover

Which characteristic is NOT essential for an ecosystem to demonstrate resilience?

• Fast-growing producers

• Low net primary productivity

• High species diversity

• Presence of generalist species

What was a key finding of the Hubbard Brook Ecosystem Study?

• Nutrient cycles are unaffected by vegetation

• Forests have no impact on nutrient cycles

• Plants play a crucial role in nutrient cycling

• Nutrients are primarily found in the ocean

In the Hubbard Brook study, what happens to nutrients without intact plant communities?

• They end up in the ocean

• They cycle back to the atmosphere

• They are absorbed by animals

• They remain in the soil

What does the Intermediate Disturbance Hypothesis suggest about species diversity?

• Diversity is highest with intermediate disturbances

• Diversity is highest with no disturbances

• Diversity is unaffected by disturbances

• Diversity is highest with frequent disturbances

Why is species richness low on the left side of the disturbance graph?

• High predation rates

• Frequent natural disasters

• Lack of disturbance allows dominant species to take over

• High levels of disturbance

Which of the following is NOT an example of an ecosystem disturbance?

• Hurricanes

• Photosynthesis

• Predation

• Floods

What was the final topic covered in Module 8?

• Movement of energy

• Movement of matter

• Responses to disturbances

• Ecosystem services

What should students focus on for their test preparation?

• Reading additional textbooks

• Reviewing the module summary and multiple-choice questions

• Watching unrelated videos

• Ignoring the module content