moritz9-1 - Bio1B Evolution 9 Last lecture: Evolution of...

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Bio1B Evolution 9 Last lecture : Evolution of sacrifice (altruism) What is a species anyway? (Pp. 487-492) – Concepts - typological, biological, phylogenetic – Reproductive isolation - mechanisms Today • What is a species anyway? (Pp. 487-492) – Interesting one - Ensatina salamanders • Speciation processes (Pp 492-504; Losos & Rickleffs (2009) paper - • Adaptive radiations • Hybridization - hybrid zones, reinforcement & hybrid- speciation 2 Ensatina eschscholtzii - One ring species? Or 2 biological species? Or >11 Phylogenetic species k-e overlap; no hybrids k-e overlap; hybrids 3 Geographic modes of speciation Futuyma 2005 4 exiguus aenigma bombiens saxatilis concinnus monticola hosmeri exiguus v aenigma • 5% mtDNA divergence freq. call in aenigma concinnus v monticola • 5% mtDNA divergence
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This note was uploaded on 09/06/2010 for the course CHEM 10894 taught by Professor Pederson during the Fall '10 term at University of California, Berkeley.

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moritz9-1 - Bio1B Evolution 9 Last lecture: Evolution of...

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