Definition of Biodiversity
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Questions and Answers

What factor can negatively affect biodiversity in lakes?

  • Warm temperatures
  • Freezing of the lake (correct)
  • Excessive oxygen levels
  • Moving water
  • What are the primary producers in freshwater lakes?

  • Plants, phytoplankton, and zooplankton (correct)
  • Amphibians and reptiles
  • Birds and small mammals
  • Fish and alligators
  • Why do estuaries and salt marshes have relatively low biodiversity?

  • High oxygen levels
  • Salinity fluctuations from freshwater to saltwater (correct)
  • Due to constant movement of water
  • Abundance of primary producers
  • Which organisms are common in estuaries and salt marshes due to their ability to excrete excess salts?

    <p>Oysters and crabs</p> Signup and view all the answers

    What type of organisms are crucial for the biodiversity of rivers?

    <p>Primary producers and fish</p> Signup and view all the answers

    What is the impact of temperature on stagnant bodies of water like lakes?

    <p>Decreases oxygen levels</p> Signup and view all the answers

    Which type of water body is compared to the intertidal zone due to constant movement?

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

    What happens if a lake becomes anoxic?

    <p>Decreased oxygen levels</p> Signup and view all the answers

    What impact do incoming tides from oceans have on estuaries and salt marshes?

    <p>Introduce fish such as salmon</p> Signup and view all the answers

    What is the main consequence of a lake freezing?

    <p>Anoxic conditions</p> Signup and view all the answers

    Which primary producers are mainly found in freshwater lakes?

    <p>Plants, phytoplankton, and zooplankton</p> Signup and view all the answers

    What type of organisms are commonly found in rivers due to the constant movement of water?

    <p>Fish and macrophytes</p> Signup and view all the answers

    Which specialized habitats have fluctuating salinity levels from freshwater to saltwater?

    <p>Estuaries and salt marshes</p> Signup and view all the answers

    What is a key factor contributing to the low biodiversity in estuaries and salt marshes for organisms that live there exclusively?

    <p>Salinity fluctuations</p> Signup and view all the answers

    Which organisms find estuaries and salt marshes as important places for feeding grounds?

    <p>Mammals and birds</p> Signup and view all the answers

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