@Lecture05_4

@Lecture05_4 - PALEOBIOLOGY Species and Speciation Fall 2010 GEL 107 Lecture 05 1 2 A species Organismal species Naturally defined group of

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1 PALEOBIOLOGY 1 Fall 2010, GEL 107: Lecture 05 Species and Speciation 2 A species A natural kind of anything 3 A man-made kind Organismal species Naturally defined group of organisms that reflects blood- relationships 4 “Unit of evolution”
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2 I look at the term species as one arbitrarily given, for the sake of convenience, to a set of individuals closely resembling each others. 5 Charles Darwin, quoted in the textbook What is the biological species concept? hat are cline and ring species? Questions hat is the evolutionary species concept? What are allopatric and sympatric speciation? What are cline and ring species? How does the time axis affect the concept? 6 What is the phylogenetic species concept? What is the evolutionary species concept? So what is a species? A definition Groups of actually or potentially interbreeding populations, which are reproductively isolated from other such groups 7 Gene pool Gene flow estricted to sexually reproducing Problems Restricted to sexually reproducing organisms Ambiguity in interbreeding “potential” atural Condition 8 Viable and fertile hybrids Natural Condition
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3 Hybrid zone 9 Ligers 10 Tigons 11 Lion 12 http://www.barbarylion.com/All%20About%20Lions.htm
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4 Tiger 13 http://hem.bredband.net/b270760/Korkeasaari/tigerkarta.htm Tiger Lion 14 http://hem.bredband.net/b270760/Korkeasaari/tigerkarta.htm What is the biological species concept? hat are cline and ring species? Questions hat is the evolutionary species concept? What are allopatric and sympatric speciation?
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This note was uploaded on 11/02/2010 for the course GEL GEL 107 taught by Professor Jishin during the Winter '09 term at UC Davis.

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@Lecture05_4 - PALEOBIOLOGY Species and Speciation Fall 2010 GEL 107 Lecture 05 1 2 A species Organismal species Naturally defined group of

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