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Invasive Species:  What You Can Do

Test Your Knowledge

How much do you know about invasive species? Take our quiz and find out. Click on the answer which you think is correct.

  1. Which of the following invasive species disrupts power plants by the Great Lakes?

    Zebra mussel

    Zebra mussel | Correct

    Burmese python

    Burmese python | Incorrect

    Brushtail possum

    Brushtail possum | Incorrect

    Sudden oak death

    Sudden oak death | Incorrect

  2. Invasive species have many harmful effects. Which of the following impacts does buffelgrass have in the Sonoran Desert of Arizona?

    It increases how frequently wildfires sweep through lands

    It increases how frequently wildfires sweep through lands | Correct

    It transforms biologically rich savannahs into dense, shaded forests with little biodiversity

    It transforms biologically rich savannahs into dense, shaded forests with little biodiversity | Incorrect

    It strangles other plants

    It strangles other plants | Incorrect

    It produces compounds that poisons other plants

    It produces compounds that poisons other plants | Incorrect

  3. Invasive species arrive through different routes. How does water hyacinth most frequently invade?

    It arrives in ballast water from ships

    It arrives in ballast water from ships | Incorrect

    It becomes attached to cars, trucks, and heavy machinery

    It becomes attached to cars, trucks, and heavy machinery | Incorrect

    It is shipped by the horticulture trade

    It is shipped by the horticulture trade | Correct

    Its seeds are eaten and carried by feral pigs

    Its seeds are eaten and carried by feral pigs | Incorrect

  4. What percentage of endangered or threatened species in the United States are at risk from invasive species?

    8 percent

    8 percent | Incorrect

    42 percent

    42 percent | Correct

    50 percent

    50 percent | Incorrect

    1 percent

    1 percent | Incorrect

  5. Which native American species is invasive in New Zealand and Australia?

    Hellbender

    Hellbender | Incorrect

    American bison

    American bison | Incorrect

    Ivory billed woodpecker

    Ivory billed woodpecker | Incorrect

    Monterey pine

    Monterey pine | Correct

  6. Which of the following is not a management method that is used to fight invasive plants?

    Manually pulling them

    Manually pulling them | Incorrect

    Prescribed fire

    Prescribed fire | Incorrect

    Building fences

    Building fences | Correct

    Herbicides

    Herbicides | Incorrect

  7. The American chestnut was once a dominant tree in eastern North America. When did it become essentially extinct in the wild because of the non-native chestnut blight?

    200 BC

    200 BC | Incorrect

    1492 AD

    1492 AD | Incorrect

    Around the 1930-1950s

    Around the 1930-1950s | Correct

    2005

    2005 | Incorrect

  8. Determining the costs from invasive species is notoriously difficult. What is the annual cost to the USA, estimated by scientists in 2004?

    $100 million

    $100 million | Incorrect

    $100 billion

    $100 billion | Incorrect

    $120 billion

    $120 billion | Correct

    $500 billion

    $500 billion | Incorrect

  9. What is most cost effective way to deal with the effects from invasive species?

    Prevent invasions before they even occur

    Prevent invasions before they even occur | Correct

    Detect invasive species shortly after they have created infestations

    Detect invasive species shortly after they have created infestations | Incorrect

    Study the problem for a few more years

    Study the problem for a few more years | Incorrect

    Try to eradicate the most widespread invaders

    Try to eradicate the most widespread invaders | Incorrect

  10. How can you prevent the spread of invasive species when hiking?

    Always carry pesticide

    Always carry pesticide | Incorrect

    Clean your boots thoroughly before you hike in a new area

    Clean your boots thoroughly before you hike in a new area | Correct

    Wear soft soled shoes

    Wear soft soled shoes | Incorrect

    Avoid hiking alone

    Avoid hiking alone | Incorrect

Scoring

1-3 correct: You can do better - try again!

4-6 correct: Not bad, brush up on your invasive species knowledge

7-10 correct: Excellent! Find out what else you can do to stop invasive species.

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