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In the Light of Evolution Volume III: Two Centuries of Darwin (2009) / Chapter Skim
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Part I: NATURAL SELECTION, OR ADAPTATION TO NATURE
Pages 1-4

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From page 1...
... The basic logic of natural selection is astonishingly simple. As phrased by Darwin in The Origin, As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected.
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From page 2...
... she calls this the "magnifying glass" approach for speciation in action, and contrasts it with the more traditional "spyglass" approach in which each completed speciation is characterized retrospectively by scrutinizing genetic differences between established sister taxa. via develops and presents genetic evidence for a model in which incipient species become, in effect, genealogical mosaics in which ecologically important genomic regions (i.e., those under divergent ecological selection, sometimes even in sympatry)
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From page 3...
... Under ecological speciation, reproductive isolation between populations emerges from the effects of ecology-based divergent natural selection. The authors address this speciation mode generally (with respect to the genetics of postzygotic isolation and prezygotic isolation under gene flow, and the role of standing genetic variation in the process)
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Key Terms

  • genomic regions
  • species phylogeny
  • genetic differences
  • genetic variation
  • divergent selection

  • divergent natural
  • biological species
  • scrutinizing genetic
  • key genomic
  • additional genetic

  • ing genetic
  • freshwater streams
  • sometimes constrained
  • modern biological
  • routinely extend

  • probably played
  • cal selection
  • gene flow
  • richest biological
  • species boundary

  • sister taxa
  • branching pattern
  • biological quarries
  • sometimes channeled
  • various mixes

  • evolutionary experimentation
  • organismal traits
  • nathan derieg
  • ary insights
  • populations emerges


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