ENSC 320 Lecture Notes - Lecture 3: Land Ethic, Overgrazing, Active Management
21 Aug 2016
School
Department
Course
Professor
Document Summary
Why north america: we live there, great examples we can draw on, best and worst of wildlife conservation, identifiable milestones, links between wildlife population trends and dominant attitudes at the time. Dates are arbitrary, but correspond to changing philosophies, world events and societal directions, economy etc. Not only do they define major events, they reflect dominant perspectives of wildlife at the time. 11,500bc to 1500 ad: no recorded history to sub divide this. Many hunter-gatherer" societies: way that people gather resources for themselves fish and wildlife were important dietary component, *utilitarian and spiritualistic value orientation. Late pleistocene extinctions last 50 000 years, mass extinctions involving at least 200 genera: species fall under genera selective: largely limited to megafauna similar extinctions occurred in other parts of the world, but at different times. North american extinctions begin shortly after widespread peopling of continent. Extinction of many large herbivores, may be at least partially attributable to humans.
