ANT101H5 Lecture Notes - Lecture 21: Viral Hemorrhagic Fever, Arctic Ocean, Anthropocene
Document Summary
The geologi(cid:272)al epo(cid:272)h duri(cid:374)g (cid:449)hi(cid:272)h hu(cid:373)a(cid:374) (cid:271)eha(cid:448)ior (cid:271)e(cid:272)a(cid:373)e o(cid:374)e of the earth"s (cid:373)ajor geomorphological and geological processes. Sea ice reflects back into space about 80% of the sunlight that hits it. This will lead to the extinction of several species including polar bears who rely on sea ice for their survival. Others see melting sea ice as a financial opportunity increased sea transport and drilling for oil. Weather will increasingly become unpredictable and more extreme and destructive events. Loss of agricultural lands extinction of plant and animal species altered patterns of infectious disease. Coral reefs are the most diverse marine ecosystems on earth important food source. 20-25 % of animal protein consumed by humans comes from a marine environment. In the last 570 million years there have been at least 15 million extinction events, two of which altered all of the earth"s ecosyste(cid:373)s. 1st 250 mya resulted from climate change (cid:373)ergi(cid:374)g of earth"s la(cid:374)d(cid:373)asses i(cid:374)to o(cid:374)e super- continent.
