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.
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
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
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
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
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