Ecological Stability and Disturbances Quiz

What is the main focus of today's lesson?

• The history of ecological studies

• The role of humans in ecosystem destruction

• The impact of technology on ecosystems

• Ecological stability, disturbances, and succession

Which factor is most important for maintaining ecological stability?

• Frequent natural disasters

• Greater biodiversity

• Increased human activity

• High levels of pollution

What role do keystone species play in an ecosystem?

• They help hold the ecosystem together

• They are the least important species

• They are the most numerous species

• They are always predators

Which of the following is an example of a natural disturbance?

• Deforestation

• Commercial fishing

• Urban development

• A wildfire

How can minor disturbances benefit an ecosystem?

• By creating uniform conditions

• By eliminating keystone species

• By increasing diversity and renewing resources

• By reducing biodiversity

What is an invasive species?

• A species that is beneficial to its new environment

• A native species that thrives

• A species that cannot survive in a new environment

• A species introduced to a new environment that causes harm

What is the primary difference between primary and secondary succession?

• Secondary succession occurs in areas with no previous life

• Primary succession occurs in areas without soil

• Secondary succession occurs in areas without soil

• Primary succession occurs in areas with existing soil

Which event is likely to lead to secondary succession?

• A volcanic eruption creating new land

• A glacier melting to reveal new land

• A forest fire leaving soil intact

• An asteroid impact

How do ecosystems typically rebuild after a disturbance?

• By reducing biodiversity

• By increasing human intervention

• Through ecological succession

• By eliminating all existing species

What is the role of wind and water in ecological succession?

• They prevent new growth

• They destroy existing ecosystems

• They deliver spores and seeds for new growth

• They have no role in succession