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Chapter 10

BIO120H1 Chapter Notes - Chapter 10: Frederic Clements, Metapopulation, Radical Mastectomy

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Spencer Barret

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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)!
metapopulation structure!
-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
species diversity!
-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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