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 doesnt 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)

  • Identificationandlocation
  • 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
  • Oftencollides 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

  • "Alien Species ". Southern Crossroads. June 5, 2010.
  • Canada Goose. Delivering Alien Species Inventories for Europe. June 5, 2010
      • .
  • Canada Waterweed . Delivering Alien Species Inventories for Europe. June 5, 2010
      • .
  • "DAISIE". Delivering Alien Species Inventories for Europe. June 5, 2010.
  • "Explore Your Watershed". Carson River Watershed. June 5, 2010.
  • "Global Invasive Species Database ". Invasive Species Specialist Group. June 5, 2010.
  • "Invasive ". Center for Invasive Species and Ecosystem Health. June 5, 2010.
  • "Invasive Species Information Center". Natural Agricultural Library. June 5, 2010.
  • "Shoreline Weed Control ". Shoreline Weed Control. June 5, 2010.