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Invasive species toto todor elena

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  • 1. Invasive Species – A Threat to the Environment Todor Toto Elena 10/1
  • 2. What are Invasive Species? (4, 6)
    • A broad term
    • Definition – “a species of animals or plants non-native to an environment in which their numbers are growing rapidly “
    • May be used for native species
    Poison hemlock (US) http://upload.wikimedia.org/wikipedia/commons/b/b2/Conium.jpg
  • 3. Alien Species (1, 4)
    • “ Alien species” & “Invasive species” - not interchangeable!!!
    • Alien species that doesn’t do harm - Introduced
    • Example: Goldfish (on picture)
    http://jerkmag.files.wordpress.com/2009/10/goldfish3.jpg
  • 4. Characteristics of Invasive Species (4, 6)
    • Grow rapidly
    • Common species – extinct
    • Food chain
    • Chain reactions - catastrophic to economies and habitats
    http://danceswithflowers.files.wordpress.com/2009/08/ipresents.jpg
  • 5. Ecological Problems Caused by Invasive Species (6)
    • Remove natural controls -> other species flourish
    • Extinction
    • Genetic pollution
    • Both animal and plant species are threatened
    http://imghost.indiamart.com/data/1/P/MY-978044/poultry-chicken_250x250.jpg http://www.birding.in/images/Birds/red_junglefowl.jpg
  • 6. Economic Problems Caused by Invasive Species (6)
    • Rapid decline in tree populations
    • Large amounts of crops destroyed
    • Damage to fish industries
    • Damages are often worth billions of dollars
  • 7. Methods of Introduction (7)
    • Intentional - purposefully brought by humans, usually for profit
    • Accidental - a species “hitchhiking” onto a man-made vessel and traveling to another environment
    Red foxes: introduced to Alaska to help fur trade http://www.wildnatureimages.com/images%203/Red-Fox-Road..jpg Killer bees: accidentally made their way into Brazil http://www.thinkrabies.com/killerbee.jpg
  • 8. Dealing With Invasive Species (1, 8)
    • Identification and location
    • Once identified -> removed with pesticides
    • Harder and more costly to remove
    • Poisoning, hunting, or transportation out of the area
    • Social awareness and involvement
    Removing harmful vines http://www.watershedactivities.com/projects/summer/media/vineremoval3.jpg
  • 9. Examples of Invasive Species (2)
    • Canada Goose ( Branta Canadensis )
    • Description
    • Native range
    • Introduced range
    http://www.cwsd.org/images/canadagoose.jpg
  • 10.
    • Genetic pollution of Greylag Goose
    • Feeds on valuable crops
    • Kills and diminishes small fowl populations
    • Droppings - environmental hazard
    • Often collides with aircrafts
    http://www.europe-aliens.org/images/factsheetMaps/31_bracan.jpg
  • 11. Examples of Invasive Species (3, 9)
    • Canadian Waterweed ( Elodea canadensis )
    • Description
    • Native range
    • Introduced range
    http://www.shorelineweedcontrol.com/images/weeds/waterweed.jpg
  • 12.
    • Outnumbers native plants
    • An obstacle for fishing, swimming, boating, water skiing
    • Attempts to remove it by blocking sunlight, poisoning, and introducing species that eat it
    http://www.europe-aliens.org/images/factsheetMaps/61_elocan.jpg
  • 13. Sources & Bibliography
    • &quot;Alien Species &quot;. Southern Crossroads. June 5, 2010 <http://southerncrossroads.info/capeoffire/alien-mug-shots-know-the- enemy/>.
    • “ Canada Goose”. Delivering Alien Species Inventories for Europe. June 5, 2010
        • <http://www.europe-aliens.org/speciesFactsheet.do?speciesId=50357#>.
    • “ Canada Waterweed” . Delivering Alien Species Inventories for Europe. June 5, 2010
        • <http://www.europe-aliens.org/speciesFactsheet.do?speciesId=1052#> .
    • &quot;DAISIE&quot;. Delivering Alien Species Inventories for Europe. June 5, 2010 <http://www.europe-aliens.org>.
    • &quot;Explore Your Watershed&quot;. Carson River Watershed. June 5, 2010 <http://www.cwsd.org/images/canadagoose.jpg>.
    • &quot;Global Invasive Species Database &quot;. Invasive Species Specialist Group. June 5, 2010 <http://www.issg.org/database/welcome/>.
    • &quot;Invasive &quot;. Center for Invasive Species and Ecosystem Health. June 5, 2010 <http://www.invasive.org>.
    • &quot;Invasive Species Information Center&quot;. Natural Agricultural Library. June 5, 2010 <http://www.invasivespeciesinfo.gov/>.
    • &quot;Shoreline Weed Control &quot;. Shoreline Weed Control. June 5, 2010 <http://www.shorelineweedcontrol.com/images/weeds/waterweed.jpg>.

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