Biology 2483A Lecture Notes - Lecture 24: Ocean Acidification, Marine Snow, Carbon Cycle
3 Jan 2018
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Document Summary
Anthropogenic emissions of sulfur and nitrogen cause acid deposition, alter soil chemistry, and affect the health of ecosys tems. Losses of ozone in the stratosphere and increases in ozone in the troposphere each pose risks to organisms. We are changing our environment at a chemical level. Elements move among geologic, atmospheric, oceanic, and biological pools at a global scale. Obtaining carbon from atmosphere, mass is coming from the atmosphere. Calcium carbonate shells of phytoplankton they die and carbon moves into sediments and deeper waters. Industrial revolution -> lots of combustion of fossil fuels. Fossil fuels are buried organisms that have partially fossilized we extract and burn that carbon. Image from last lecture about old growth forests disappearing. Whe(cid:374) (cid:449)e take a(cid:449)ay the a(cid:271)ility for the e(cid:272)osyste(cid:373)s to re(cid:373)o(cid:448)e (cid:272)ar(cid:271)o(cid:374) fro(cid:373) the at(cid:373)osphere, (cid:449)e"re disrupti(cid:374)g that (cid:272)ar(cid:271)o(cid:374) (cid:272)y(cid:272)le. Anthropogenic influenced by humans ex. we"re burning fossil fuels, mid-19th century deforestation.
