Fundamentals of Genetics, Evolution, and Development 8: Speciation

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Fundamentals of Genetics, Evolution, and
Development8 Speciation

• Bio 1111
• Christopher T. Cole
• University of Minnesota, Morris

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Speciation

• Allopatric
• Sympatric

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Allopatric (other homeland) Speciation
evolution.berkeley.edu
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Grand Canyon, AZ speciation in squirrels
Campbell, N.
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Sympatric Speciation
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Freshwater descendants
Marine Sticklebacks
Limnetic form
Marine form
Benthic form
Freeman Herron 2007 Evolutionary Analysis
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Barluenga et al. 2006 Nature
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Barluenga et al. 2006 Nature
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Lake Thingvallavath, Iceland
spas.about.com
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Four species descended from arctic char
J. Exp. Biol.
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African cichlids
www.thecichlidgallery.com
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Coyne Orr 2004 Speciation
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Contact between species

• Fusion (no speciation took place)
• Hybridization
• Reproductive isolation
• hybrid sterility, post-mating isolation
• premating isolation
• sexual selection
• Character displacement

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Siberian greenish warbler Phylloscopus
trochilloides
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Eurasian nuthatch Sitta neumayer
Lefteris Stavrakas
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Mayr 1970 Populations, Species, and Evolution
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Rhagoletis pomonella
www.pbase.com
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Freeman Herron 2007 Evolutionary Analysis
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Hawthorn Crategus marshallii (Rosaceae)