Class 6 Presentation 1. Invasive Species. The biggest threat to biodiversity after habitat destruction. Overview. Impact Examples Summary of characteristics of invasive. Definition.
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Organisms (usually transported by humans) which successfully establish themselves in, and then overcome, otherwise intact, pre-existing native ecosystems (World Conservation Union (IUCN)).
2002 Report of the Commissioner of the Environment and Sustainable Development
D. Pimental et al, Nature, Feb 6, 2003
Rate of change to natural selection proportional to amount of additive genetic variation present
Multiple introductions: genetic diversity