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Understanding Invasive Species and Their Impact on Ecosystems

Learn about invasive species introduced by humans causing harm to native wildlife, ecosystems, and economies. Explore methods to combat invasions and protect biodiversity.

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Understanding Invasive Species and Their Impact on Ecosystems

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  1. GK-12 Fellows Liz Schultheis & Melissa Kjelvik Species invasions!

  2. What is an invasive species? • Introduced from another country by people • Grows and takes over an area • Can harm native species • Cost people a lot of time and money

  3. Do you know of any invasive species?

  4. Zebra Mussel

  5. Asian carp “To combat these and other invasive species, which could threaten the Great Lakes ecosystem and its $7 billion fishing industries, the resources defense council has proposed physical barriers to separate Chicago waterways and Lake Michigan from the Mississippi.” - NY Times November 2011

  6. Emerald Ash Borer

  7. Emerald Ash Borer

  8. Milfoil

  9. What makes a good invader? • Easily moved to new locations by humans • Ability to reproduce quickly and spread far • Nothing eats them! No natural enemies • Take habitat away from native species

  10. Invasive Native KBS GK-12 Project Purple loosestrife Pickerel-weed

  11. Purple Loosestrife Pickerelweed Move forward: Growth: Seeds: Disperse: Move backward: Herbivory: Disease: Fire: Drought: Human disturbance: Move forward: Growth: Seeds: Disperse: Move backward: Herbivory: Disease: Fire: Drought: Human disturbance: KBS GK-12 Project

  12. Purple Loosestrife Move forward: Growth: Seeds: Disperse: Move backward: Herbivory: Disease: Fire: Drought: Human disturbance: KBS GK-12 Project • All species can grow, produce seeds, and disperse • Abilities differ between species

  13. Purple Loosestrife Move forward: Growth: Seeds: Disperse: Move backward: Herbivory: Disease: Fire: Drought: Human disturbance: KBS GK-12 Project • Some actions harm native species more than invasive species • These actions facilitate invasion

  14. Purple Loosestrife Move forward: Growth: Seeds: Disperse: Move backward: Herbivory: Disease: Fire: Drought: Human disturbance: KBS GK-12 Project • Some actions harm invasive species more than native species • These actions resist invasion

  15. KBS GK-12 Project

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