BIOS10117 Lecture Notes - Lecture 7: Overexploitation, Brucellosis, Ecosystem Services
22 Jan 2016
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Supporting services- necessary for maintenance of all other ecosystem services o o o o. Provisioning- goods we get from ecosystems o o. Regulating- regulate or maintain ecosystem structure o o o. Important culturally and as food to native americans. Males up to 2,000 pounds, females up to 1,000. Young can run within 2 hours of being born. Used to be 40-70 million bison in us taking up a very large part o the us in 1700"s o o. Euro american bison robe trade- fur extremely dense and insulating, superior leather. Overharvesting encouraged by military and cattle industry o o. By 1901 bison reduced from 40 million to 200 individuals (bottleneck effect because these individuals will have very different genetic distribution compared to original diverse pop) Us provided free ammo and supplies to buffalo hunters. Railroad divides bison into northern and southern herds. Raised money to start a new herd from just a few bison- founder effect.
