BIS 2B Lecture Notes - Lecture 31: Cichlid, Gene Flow, Cladogenesis

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: Grosberg/Stachowicz

Document Summary

6how do varices kinds of ecological interactions competitionpredation parasitism mutualismetc inference the ofspecies in aparticularplace at a particulartime. 10 so minionspeciesofearingorganismsalive today soo ooo ooo have existed mostextinct probs. Ex lake victima cichlid loos ofspecies 20ooo years. Diversification of galapagos finches descend cace14 species from blue blackgrassquit. Step i what do we mean by species. 111biologicalspecies concept species consist of groups aetraey orpotentiallyinterbreeding naturalpops that are reproductivelyisolated from other suchgroups. 2 indirs are members of some species if theybothcanand doproduceviable fertileoffspring in the wind in other words they can c doi exchangegenes challenges of this concept. 11. 1how do we know if individuals in separatepops. R whats couldactually or potentiallyinterbreed in the wind natural or coyotes degreywowes rarely naturally interbreed. 1ktspecies are breeding units that are evolutionarilyindependentfrom othersuchbreeding d sospecies are the fundamental evolutionary unit units individuals didnotevolve populations kspeciesdoevolve. 3 species represent separate evolutionary units1genepools1populations that can nolonger exchangegenescgcene flow stops henceevolveindependently of each other.