Exploring the Latitudinal Gradient in Species Diversity
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Questions and Answers

Which latitudinal range is known to have the highest species diversity?

  • 23.5° N to 23.5° S (correct)
  • 23.5° N to 71° N
  • 23.5° S to 71° N
  • 41° N to 71° N
  • What is the approximate number of bird species found in Colombia?

  • 105
  • 1,400 (correct)
  • 1,200
  • 56
  • Which region has up to 10 times as many species of vascular plants as a temperate region like the Midwest of the USA?

  • The Amazonian rainforest in South America
  • The temperate regions
  • A tropical region like Equador (correct)
  • The polar regions
  • Which of the following hypotheses proposes that tropical latitudes have had a longer evolutionary time for species diversification compared to temperate regions?

    <p>Speciation is generally a function of time</p> Signup and view all the answers

    Which of the following factors contributes to greater species diversity in tropical environments according to the hypotheses?

    <p>Relatively constant and predictable environments</p> Signup and view all the answers

    What does the hypothesis propose about the relationship between solar energy availability and species diversity in the tropics?

    <p>Solar energy availability indirectly contributes to greater diversity</p> Signup and view all the answers

    Study Notes

    Species Diversity Insights

    • Tropical latitudinal range is known for the highest species diversity globally.
    • Colombia is home to approximately 1,900 bird species, making it one of the most biodiverse countries for avian life.
    • Tropical regions can have up to ten times the species of vascular plants compared to temperate areas like the Midwest of the USA.

    Evolutionary Time Hypothesis

    • The "time" hypothesis suggests that tropical latitudes offer a longer evolutionary duration for species diversification compared to temperate regions.

    Factors Influencing Diversity

    • Factors contributing to greater species diversity in tropical environments include:
      • High levels of solar energy which support a wider variety of ecosystems.

    Solar Energy and Diversity

    • The hypothesis indicates a positive relationship between solar energy availability and species diversity, proposing that greater sunlight results in more diverse habitats and ecosystems in tropical regions.

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    Description

    Test your knowledge on the latitudinal gradient in species diversity with this quiz! Explore the uneven distribution of plants and animals across the world and learn about the patterns and exceptions to the general trend. Discover how species diversity changes as we move from the equator towards the poles.

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