BIOL 304 Lecture Notes - Lecture 35: Kill List, Invertebrate, Landform
5 Mar 2018
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Species area curve explanation: units are in log-log s(cid:272)ale so it"s (cid:374)ot a(cid:272)tually a li(cid:374)ear relatio(cid:374)ship, large area has proportionately fewer species than small areas. If it were linear, there would be many more species than there actually are. Geologic time: almost every one of the major boundaries is a major extinction event, change in biodiversity surrounding the boundaries, see that lifeforms are changing through geological time periods. Causes: >100 published theories, some things that are relevant today: climate change, floral changes, atmospheric change, ra(cid:272)ial se(cid:374)ility: (cid:373)ay(cid:271)e e(cid:448)ery spe(cid:272)ies i(cid:374) the (cid:373)esosoi(cid:272) (cid:449)ere (cid:862)ready to die(cid:863) not well adapted etc (wrong) Sea level change: after almost every extinction events, there have been drops in sea levels not sure exactly why, usually sea levels drop during climate change events, thus, there were probably temperature fluctuations surrounding extinction events. Marine animal families: extinction rates: background extinctions are occurring all the time, but larger events pop out.
