Brown Tree Snake

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Goat
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Black rat
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Starling
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Invasive Species also known as exotic species,
bioinvaders

• Plants, animals microbes not native to region
• Accidentally or intentionally introduced
• Out-compete native species for resources
• Reproduce prolifically
• Difficult to control due to lack of native
  predators
• Dominate ecosystems

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Zebra Mussel (24 MM)
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Caspian Sea to Missouri River????HOW????
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Just a Long Ride Across the Ocean in a Big Ship

• 1988 Lake St. Clair (connects Lake Huron Lake
  Erie
• 1990 in all Great Lakes
• 1991 into Illinois Hudson Rivers
• 1992 Arkansas, Cumberland, Hudson, Illinois,
  Mississippi, Ohio Tennessee
• 1994 19 states report zebra mussels
• 2002 isolated quarry in Virginia

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Cluster of zebra mussels
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Kudzu vines
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Abstract Art?
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Unique use of kudzu vines
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Japanese Honeysuckle flowers
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Is this a pretty picture?
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Taking a chokehold
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Strangulation
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Field of purple loosestrife
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Chestnut Blight Fungus
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Brown Tree Snake
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Impacts of Invasive Species

• Decrease in local/global biodiversity --
  decrease ecosystem health -- extinction
• competition
• change to habitat
• domination of habitat
• changes in predator/prey relationships
• carry disease
• hybridization

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Am I an invasive species to the Galapagos Islands?
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Effects Cont.

• Estimated U.S. cost - 125-140 billion annually
• Estimate 25 U.S. agriculture gross national
  product lost to foreign pests
• Nearly half of the species listed as threatened
  or endangered under the Endangered Species Act
  are at risk due to competition with or predation
  by invasive species

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What can you do to help solve this problem?
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http//tncweeds.ucdavis.edu/