BIO120H1 Lecture Notes - Lecture 11: Salvinia, Polyploid, Echinochloa
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BIO120H1 Full Course Notes
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The successful establishment of a species in a region not previously occupied followed by rapid range expansion. Biological invasions do not always involve harmful species but most do. An indigenous species that occurs wild in a given region. A species that has been introduced to a part of the world to which it is not native. Also referred to as adventive, exotic or simply introduced species. Disrupt ecological processes in natural plant & animal communities. Serious economic & social impacts through reduction of yields in agriculture & fisheries. 50 000 introduced species and the number is rising. Differences in enemy attack in populations of white campion (silene latifolia) from. Pest and disease pressure was x17 times higher in the native range compared to the alien range and involved both specialist and generalists. The more disturbance the more vulnerable to invasion. *the ability of a genotype to alter its phenotype in response to environmental change - an impo important.
