Biology 2483A Lecture Notes - Lecture 22: Giant Panda, Trophy Hunting, Molecular Genetics
15 Oct 2017
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8,000 species of birds following colonization by polynesians: most of the species were endemic. Midwest 50 years ago as fish bait: you (cid:449)o(cid:374)"t fi(cid:374)d a(cid:374)y pure califor(cid:374)ia tiger sala(cid:373)a(cid:374)der, they are washed with genes with hybridization event, you end up losing that particular species. Invasive species can alter ecosystem properties: kudzu has rapid nitrogen mineralization rate, if you have mass that inflexed limiting nutrients to the system, it cost very large effect, there is also denitrification occurring. Models predicted a 90% chance of extinction within 20 years: in 1995, eight pumas from texas were released in southern florida. Panther numbers tripled, levels of genetic variation doubled, and frequency of genetic abnormalities decreased: genetic rescue: you bring in some variability from different populations of the same species, trade-off: you no on longer have panther around. An international ban on ivory trade helped, but illegal trading emerged.
