The Great Barrier Reef Ecosystem

19 Questions | Total Attempts: 52

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The Great Barrier Reef Ecosystem

The Great Barrier Reef is a fragile ecosystem under threat from human activities.


Questions and Answers
  • 1. 
    What are the main components of a natural ecosystem?
    • A. 

      Sun, animals, plants, water and earth

    • B. 

      Producers, detritus, carnivors, omnivors and energy from the sun

    • C. 

      Sun, producers, consumers and decomposers

  • 2. 
    What is this creature?
    • A. 

      A coral polyp

    • B. 

      A sponge

    • C. 

      A coral scavanger

    • D. 

      A coral predator

  • 3. 
    The main natural threat to the  sustainability of BRG ecosystem are:
    • A. 

      Siltation from flood runoff

    • B. 

      Disease of the coral polyp

    • C. 

      Increased water temperature resulting from climate change

    • D. 

      Shifts in ocean currents and the nutrients they carry

  • 4. 
    What is the extent of the GBR?
    • A. 

      It stretches the full length of Queensland

    • B. 

      It extends from the Torres Strait to just south of the Tropic of Capricorn

    • C. 

      It covers an area equal to Tasmania

    • D. 

      It is the largest fringe reef in the world and is more than 500km in length.

  • 5. 
    The Great Barrier Reef was listed as a word Heritage site in:
    • A. 

      1981

    • B. 

      2001

    • C. 

      1990

    • D. 

      2004

  • 6. 
    Between 1996 and 2004, the area designated  'general use' was reduced by more than half, while areas set aside for protection and scientific research increased by more than 200%.
    • A. 

      True

    • B. 

      False

  • 7. 
    Corals are very sensitive to _______________________, evidenced by the dying of coral, known as _____________________.
  • 8. 
    Riverine runoff, especially after extensive flooding, as happened in Queensland over January, can impact the reef ecosystem. These impacts include (List 3)
  • 9. 
    What impact would the overfishing of herbivorous fish have on the ecosystem?
    • A. 

      Increase growth of algae and seagrasses which can snuff our the coral

    • B. 

      Smaller fish will thrive in great numbers

    • C. 

      Higher order carnivors will increase in number

  • 10. 
    A coral polyp lives in a _____________ relationship with a ________ zooxanthellae that gives the coral its color. Zooxanthellae take in carbon dioxide, process it through ________________, and give off oxygen and other important nutrients that are then used by the host polyp.
  • 11. 
    Coral reefs are one of the most biologically ____________ ecosystems on earth, rivaled only by tropical _________________. They are made up not only of ______ and ______corals, but also s - - - - - , crust- - - - - - , mollusks, fish, sea turtles, sharks, dolphins and much more. C_________________for resources such as food, space and sunlight are some of the primary factors in determining the abundances and diversity of organisms on a reef. Each component of a coral reef is d__________________ upon and interconnected with countless other plants, animals and organisms. This means that fluctuations in the abundance of one species can drastically _________ both the diversity and abundances of others.
  • 12. 
    Reefs play an important role in ....
    • A. 

      Stopping the runoff from land into the ocean

    • B. 

      Ensuring that the coastal ecosystems are able to function properly

    • C. 

      Protecting the shoreline form storms and storm surges

  • 13. 
     Local fisheries, such as lobster, stone crab, snapper and grouper, all directly rely on the reef for spawning and habitat
    • A. 

      True

    • B. 

      False

  • 14. 
     Large fish such as tuna and dolphin rely on the the small fish whose habitat is the reef.
    • A. 

      True

    • B. 

      False

  • 15. 
    Most corals and sponges are __________ feeders, which means that they consume particulate matter suspended in the water column
    • A. 

      Bottom

    • B. 

      Filter

    • C. 

      Scavanger

  • 16. 
    What is the major impact that unmonitored tourism can have on the reef
    • A. 

      Water pollution - litter, diesel

    • B. 

      Trampelling and direct damage to the coral

    • C. 

      Destruction of sensitive areas though overfishing

    • D. 

      All of the above

  • 17. 
    Why are mangroves important to the health of the reef system?
    • A. 

      They filter nutrients and pollutants that would otherwise flow into the reef system

    • B. 

      They act as storm buffers for the reef, reducing the impact of storm surges

    • C. 

      They attract the mosquitoes and other pests that would compete with other species.

  • 18. 
    Seagrasses do not compliment reef systems as they can overrun the corals and cause an imbalance in tthe ecosystem?
    • A. 

      True

    • B. 

      False

  • 19. 
    Why was the Great Barrier Mrine Park Authority established?
    • A. 

      To provide information to governments about the stability and health of the reef

    • B. 

      To develop plans and practices to manage the reef ecosystems

    • C. 

      To create zones as a way of monitoring and restricting access to the reef

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