Biology 2485B Lecture Notes - Lecture 19: Holocene Extinction, Invasive Species, Introduced Species
4 Jan 2019
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Major current threats to biodiversity: habitat alteration (loss, fragmentation of remaining habitats, degradation of habitat quality) Invasive species: pollution on wildlife and wild populations, overharvesting e. g. fisheries, climate change. Learning objectives: understand that not all exotic species are invasive, describe reasons for introduction of exotic species, describe key hypotheses for why some exotic species become invasive, understand potential impacts of invasive species. Invasive species: exotic species: a species found outside of its natural range because of human activity. Is a species that we have moved from outside its natural range to somewhere else. Invasive species: an exotic species that has spread in distribution and increased in abundance. Has on its own, after being introduced to a new location, spread in distribution and increased in abundance. Most species that are introduced into new places don"t necessarily become invasive: species have been moving around the earth on their own forever.
