Invasive species toto todor elena

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Invasive species toto todor elena

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

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