BIO120H1 Chapter Notes - Chapter 10: Frederic Clements, Metapopulation, Radical Mastectomy
by Kara Ma
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Thursday, December 8, 2016
Struggle for Existence!
Part X: Synthesis and conclusion
-The world is a heterogeneous place!
•spatial structure — patchiness is everywhere!
•importance of the frequency and magnitude of disturbance!
•the spatial and temporal scales of patchiness are importance!
-ex. gopher-lily interaction (both indirect and direct)!
-infrequent migration changes the outcomes of interactions!
-competition that leads to extinction in homogenized population can lead to
coexistence in weakly coupled metapopulation!
-occasional disturbance can knock back succession, leading to coexistence and
-Process of evaluating scientiﬁc ideas!
•bad example — Frederic Clements!
•enthusiasm can easily slide into dogmatism!
•one needs to look for contradictory evidence!
•better understanding of evolutionary ideas can make one more skeptical!
-“Doctrine of signatures”!
•idea that plants whose parts looked like parts of the human body would provide
medicine for treating diseases of those parts!
•banished by science!
-William Halsted’s surgical treatment of breast cancer!
•observation: excision of breast tumours usually comes back!
•thought unsuccessful operation left some bad tissue behind!
•pioneered the “radical mastectomy” (removal of the whole breast)!
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