Ecological Niche and Mass Extinctions Quiz
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Questions and Answers

What is a possible ecological role of species A in its environment?

  • It competes with species B for temperature regulation.
  • It creates a habitat that allows for diverse species interactions.
  • It contributes to the oxygen levels in its habitat.
  • It potentially influences the cell wall temperature of woody tissues. (correct)

    • What does the temperature range signify for species B?

  • It limits its ability to utilize available resources.
  • It shows a narrow adaptation to specific environmental conditions. (correct)
  • It allows for wider competition with other species.
  • It indicates the species can thrive in colder environments.

    • How does the presence of species B affect the competition dynamics in its habitat?

  • It suggests species B has developed traits to avoid competition. (correct)
  • It decreases the available habitat for species A.
  • It leads to the extinction of weaker species in the area.
  • It increases competition for food resources.

    • What does the statement regarding environmental conditions imply about species A?

    <p>Their survival is closely linked to specific temperature ranges.</p> Signup and view all the answers

    What conclusion can be made regarding the resource utilization of species A and B?

    <p>Species A uses oxygen resources differently compared to species B.</p> Signup and view all the answers

    In what environment does species B prefer to exist?

    <p>In streams with stable and narrow temperature ranges.</p> Signup and view all the answers

    What is indicated about the habitat of species A?

    <p>Its habitat must maintain constant temperature conditions.</p> Signup and view all the answers

    What trait has species B developed that aids in its survival?

    <p>Specific adaptations to utilize narrow temperature ranges efficiently.</p> Signup and view all the answers

    What are the names of the two species of gastric-brooding frogs mentioned?

    <p>Rheobatrachus silus and Rheobatrachus vitellinus</p> Signup and view all the answers

    In what year did the Pyrenean ibex become extinct?

    <p>2000</p> Signup and view all the answers

    What is the primary cause hypothesized for the Big Five mass extinctions?

    <p>Glaciation, volcanism, and impact events</p> Signup and view all the answers

    What percentage of species is thought to have been killed by the Big Five mass extinctions?

    <p>Approximately 75%</p> Signup and view all the answers

    What has been observed about modern extinction rates?

    <p>They are exceptionally high and suggest a sixth mass extinction.</p> Signup and view all the answers

    Which factor does NOT contribute to the characterization of mass extinctions?

    <p>Decline in genetic diversity</p> Signup and view all the answers

    When were the gastric-brooding frogs discovered?

    <p>1973 and 1984</p> Signup and view all the answers

    What role did hunting and competition from domestic animals play in the extinction of the Pyrenean ibex?

    <p>They contributed to the species' extinction.</p> Signup and view all the answers

    What percentage of the decreasing species are still classified as 'low concern'?

    <p>55%</p> Signup and view all the answers

    Which of the following species is mentioned as decreasing in the content?

    <p>Barn swallow</p> Signup and view all the answers

    Loss of biodiversity primarily affects what aspect of species?

    <p>Geographic distribution</p> Signup and view all the answers

    What common outcome is expected due to biodiversity loss?

    <p>Decreased availability of species</p> Signup and view all the answers

    How many kilometers of birds are referenced in the content?

    <p>10,000 km</p> Signup and view all the answers

    Which of the following gibbons is specifically mentioned as being endangered?

    <p>Nomascus hainanus</p> Signup and view all the answers

    What best describes 'decreasing common species' in the content?

    <p>Species that are becoming less common</p> Signup and view all the answers

    Which of the following statements is false regarding biodiversity loss?

    <p>It has no impact on ecosystem services.</p> Signup and view all the answers

    What concept helps explain why different species can coexist without competing for the same resources?

    <p>Ecological niche</p> Signup and view all the answers

    In what way do hawks and owls demonstrate resource differentiation?

    <p>They hunt at different times of day.</p> Signup and view all the answers

    Which of the following statements about symbiotic relationships is true?

    <p>Symbiotic relationships can help digest food in host organisms.</p> Signup and view all the answers

    What is a primary benefit of having all necessary resources in a habitat?

    <p>It allows for mutual benefits among co-existing species.</p> Signup and view all the answers

    What ecological strategy allows hawks and owls to exist without direct competition?

    <p>Temporal resource partitioning</p> Signup and view all the answers

    What happens to a species that faces intense competition for its specific role in an ecosystem?

    <p>It migrates to another area.</p> Signup and view all the answers

    Which of the following statements is true regarding a species' role within its ecosystem?

    <p>Its role can change based on competition and natural selection.</p> Signup and view all the answers

    What can occur to a species if it cannot adapt to competition?

    <p>It may suffer a population decline or extinction.</p> Signup and view all the answers

    How does natural selection influence a species competing for its ecosystem role?

    <p>It may result in some species becoming extinct.</p> Signup and view all the answers

    What role does migration play for a species in an ecosystem?

    <p>It can serve as a strategy for surviving competition.</p> Signup and view all the answers

    Study Notes

    Ecological Niche

    • A species' role in its ecosystem
    • Not to be confused with its habitat
    • Species with similar requirements compete for resources
    • Through evolution, species develop traits to avoid competition
    • Examples: Hawks & owls have different hunting times; flatworms have different temperature ranges

    Habitat Complexity

    • Enables species coexistence
    • Allows for complete resource use
    • Example: Gastric-brooding frogs lived in a small area in Australia
    • Extinct due to habitat loss

    Mass Extinctions

    • Characterized by high extinction rates and long-lasting ecosystem change
    • The "Big Five" mass extinctions killed over 75% of species
    • Triggers include glaciation, volcanism and asteroid impact

    Sixth Mass Extinction?

    • Modern extinction rates are exceptionally high and unprecedented
    • Suggest a mass extinction underway
    • This is exacerbated by the loss of biodiversity
    • Example: The Hainan gibbon is critically endangered, the barn swallow is decreasing due to habitat loss
    • Ranges of species are shrinking, leading to a loss of individuals and biodiversity

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    Related Documents

    Module 3 Biodiversity PDF

    Description

    Test your knowledge on ecological niches, habitat complexity, and the significance of mass extinctions. Explore the roles species play in their ecosystems, the impact of habitat loss, and the current threats leading to potential sixth mass extinction. Ideal for students studying ecology and environmental science.

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