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Invasive Species. Sometimes called nonnative species , alien species or exotic species are species that migrate into an ecosystem or are deliberately or accidentally introduced into an ecosystem by humans.

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Invasive Species


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    1. Invasive Species Sometimes called nonnative species, alien species or exotic species are species that migrate into an ecosystem or are deliberately or accidentally introduced into an ecosystem by humans. Bioinvasion – introduction of species by direct or indirect human actions, to areas where they did not previously exist. Feral Hogs Zebra Mussels Kudzu Giant Salvinia

    2. Invasive Species • Can spread rapidlyif they find a new more favorable niche. Niche – (ecological niche) the total way of life or role of a species in an ecosystem. It includes all physical, chemical, and biological conditions that a species needs to live and reproduce in an ecosystem. • Do not face the natural predators and diseases they faced in their original ecosystem • Out-compete native species for resources

    3. Invasive Species Characteristics of Successful Invader Species: • High Reproductive rate, short generation time (r-selected species) • Pioneer species • Long lived • High dispersal rate • Generalists • High Genetic Variability

    4. Invasive Species Characteristics of Ecosystems Vulnerable to Invader Species: • Climate similar to habitat or invader • Absence of predators on invading species • Early successional systems • Low diversity of native species • Absence of fire • Disturbed by human activities

    5. Invasive Species Feral Hogs https://www.youtube.com/watch?v=GigpxLNbgeg&list=PLE3A48576631EFCE7 Kudzu http://www.youtube.com/watch?v=iLH1qLCvqSg Zebra Mussels https://www.youtube.com/watch?v=h2IIHvWB3A0 Giant Salvinia https://www.youtube.com/watch?v=lq8OV9H-k3w