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?

    <p>High variation in canopy cover, moisture, and temperatures in small areas</p> Signup and view all the answers

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

    <p>Habitat destruction and overuse of resources</p> Signup and view all the answers

    How do rainforests maintain high levels of genetic diversity?

    <p>Through populations with enough numbers</p> Signup and view all the answers

    What role does species evenness play in a stable ecosystem?

    <p>Maintaining a balance in different species populations</p> Signup and view all the answers

    Why are rainforests considered relatively stable ecosystems?

    <p>High species diversity allowing for role filling by similar species</p> Signup and view all the answers

    What causes rainforests to face extinction despite being highly diverse?

    <p>Increased habitat destruction and overuse of resources</p> Signup and view all the answers

    What best describes the impact of overharvesting on an ecosystem?

    <p>Increased vulnerability as other species struggle to fill depleted roles</p> Signup and view all the answers

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