Exploring the Link between Species Diversity and Ecosystem Functioning
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Questions and Answers

What is stability for a biological community?

  • A community resistant to invasions by alien species
  • A community with occasional disturbances
  • A community with a high number of species
  • A community with little variation in productivity (correct)

    • What did David Tilman's long-term ecosystem experiments show about plots with more species?

  • Plots with more species had lower productivity
  • Plots with more species had more invasions by alien species
  • Plots with more species had higher productivity
  • Plots with more species had less year-to-year variation in total biomass (correct)

    • What did ecologists believe for many decades about communities with more species?

  • Communities with more species tend to be less stable
  • Communities with more species tend to have higher invasions by alien species
  • Communities with more species tend to have lower productivity
  • Communities with more species tend to be more stable (correct)

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