ENSC 320 Lecture 3: ENSC 320 Week 2 Lecture 3
8 Mar 2016
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Ensc 320 week 2 lecture 3: wildlife and human values january. Philosophies & politics related to wildlife use and valuation are identifiable. Peopling of north american debated vigorously: precise fates debated, likely several migrations, debate on relative importance of different routes. But, accepted that lower sea levels during last glacial period resulted in exposure of bering land bridge. But, first peoples were not a benign presence on the landscape. Areas periodically burned to promote new growth and grazing for ungulates, or to funnel wildlife. Extent to which this practise changed ecosystems is debated, but the practise is widely acknowledged. In late pleistocene (last 50,000 years), mass extinctions involving at least 200 genera. Similar extinctions occurred in other parts of the world, but at different time (precludes common cause) <5kg: woolly mammoth, north american lion, giant short faced bear. North american extinctions begin shortly after widespread peopling of continent.
