Ecosystem Resilience and Disturbances

The video discusses natural disturbances and their effects on ecosystems, focusing on two key concepts: resistance and resilience. Resistance refers to an ecosystem's ability to remain unchanged despite disturbances, while resilience is the ability to recover and return to a pre-disturbed state. The video also covers the intermediate disturbance hypothesis, which suggests that moderate disturbances can increase biodiversity. Finally, it contrasts natural disturbances with modern anthropogenic changes, highlighting the increased frequency and intensity of human-induced disturbances.

Which of the following is NOT considered a natural disturbance to ecosystems?

• Climate change

• Wildfires

• Urban development

• New predators

What does resistance in an ecosystem refer to?

• The ability to increase biodiversity

• The ability to adapt to new predators

• The ability to remain unchanged despite disturbances

• The ability to recover quickly from disturbances

Which type of ecosystem is most likely to remain unchanged by a disturbance?

• Forest ecosystems

• Urban ecosystems

• Aquatic ecosystems

• Desert ecosystems

What is the primary focus when discussing resilience in ecosystems?

• The increase in biodiversity

• The introduction of new species

• The ability to resist change

• The speed of recovery after a disturbance

How do resilient ecosystems respond to repeated disturbances?

• They become less resilient over time

• They remain unchanged

• They become more resilient

• They lose biodiversity

What is a breaking point in a resistant ecosystem?

• A point where the ecosystem can no longer remain unchanged

• A point where the ecosystem becomes more resilient

• A point where new species are introduced

• A point where biodiversity increases

What does the intermediate disturbance hypothesis suggest?

• Frequent disturbances decrease biodiversity

• Only severe disturbances affect biodiversity

• Intermediate disturbances increase biodiversity

• No disturbances lead to higher biodiversity

Which ecosystem is given as an example of benefiting from regular disturbances?

• Savanna

• Intertidal zone

• Desert

• Rainforest

What makes modern-day changes different from past natural changes?

• They are less frequent and less intense

• They only affect aquatic ecosystems

• They have no impact on ecosystems

• They are more frequent and more intense

What will be discussed in the next class session?

• The benefits of urban development

• The role of new predators in ecosystems

• Whether ecosystems can recover from intense disturbances

• The impact of climate change on ecosystems