Geography 1500F/G Study Guide - Final Guide: Biosphere 2, Extince, Extinction Event
11 Dec 2018
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8 scientists lived for 2 yrs in an airtight greenhous in arizona. Y1: lost weight couldn"t grow enough food. Most small animals and all pollinating insects died; cockroaches and ants thrived. Creating a closed living system hard. Intrinsic values: valuable in their own right, regardless of their use to human. Use value: provide us w/ thing we need (food, medicine, need to protect habitat, not just individual species. Non-use value: benefit from biodiversity w/out using it up: aesthetic value. ie. enjoy nature, existence value. ie. feel good knowing pandas, bequest value: protect for future generations. Another way of summarizing different perspectives: anthropocentric: human-centred, ecocentric: nature-centred. 96% of marine species, 70% of land species extince. Caused by meteorite or major volcanic activity. Half of all species extinct, including dinosaurs. Scientists agree we are now in another ~ possibly the fastest ever. Habitat loss, invasive species, pollution, population growth, overconsumption.
