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Understanding Alpha, Beta, and Gamma Diversity in Ecosystems Quiz

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Understanding Alpha, Beta, and Gamma Diversity in Ecosystems Quiz

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Questions and Answers

What is the defining characteristic of a stable ecosystem?

Low genetic diversity within populations

Frequent fluctuations in species population size

Constant extinction of species

Constant species evenness, density, and population size (correct)

Why can stable populations come close to ideal ecological stability?

Because all species within the population remain constant

Due to high levels of genetic diversity within populations (correct)

Because populations never experience fluctuations

Because no other species can fill ecological roles

What is a key advantage of a rainforest ecosystem when a species goes extinct?

Constant decline in population size

High diversity of similar species to fill ecological roles (correct)

Low genetic diversity making recovery easier

Lack of other species to fill ecological roles

Why is ecological diversity rich on a smaller scale in rainforests?

High variation in canopy cover, moisture, and temperatures in small areas (D) Signup and view all the answers

What is a major threat to rainforests leading to their global decline?

Habitat destruction and overuse of resources (D) Signup and view all the answers

How do rainforests maintain high levels of genetic diversity?

Through populations with enough numbers (C) Signup and view all the answers

What role does species evenness play in a stable ecosystem?

Maintaining a balance in different species populations (C) Signup and view all the answers

Why are rainforests considered relatively stable ecosystems?

High species diversity allowing for role filling by similar species (C) Signup and view all the answers

What causes rainforests to face extinction despite being highly diverse?

Increased habitat destruction and overuse of resources (C) Signup and view all the answers

What best describes the impact of overharvesting on an ecosystem?

Increased vulnerability as other species struggle to fill depleted roles (D) Signup and view all the answers