000001574 001__ 1574 000001574 005__ 20250922143400.0 000001574 0247_ $$2doi$$a10.6082/uchicago.1574 000001574 041__ $$aeng 000001574 245__ $$aEvolution in Fresh Waters During the Great American Interchange 000001574 260__ $$bUniversity of Chicago 000001574 269__ $$a2017-12 000001574 300__ $$a81 000001574 336__ $$aDissertation 000001574 502__ $$bPh.D. 000001574 520__ $$aThis thesis examines the process by which continental fish faunas arise, using the Great American Biotic Interchange as a case study. The Interchange allowed South American fishes to colonize North America. I examine the history of this colonization in the Characiformes (Actinopterygii: Ostariophysi), finding repeated colonization events and a surprising non-monophyly of the group. I explore the morphological variation in the standing diversity of North American Characiformes, finding it to be a non-biased subset of the variation found in South America. I also examine intraspecific morphological variation along environmental gradients, finding that this variation can be equal to variation among species. Finally, I use ecological niche modeling to predict the future spread of characiform fishes in North America, finding that their projected future ranges may be regulated by climate, but mediated by diet. 000001574 650__ $$aSystematic biology 000001574 650__ $$aEcology 000001574 650__ $$aEvolution & development 000001574 653__ $$aCharaciformes 000001574 653__ $$aenvironmental niche modeling 000001574 653__ $$ageometric morphometrics 000001574 653__ $$ahistorical biogeography 000001574 653__ $$aphylogenetic systematics 000001574 690__ $$aBiological Sciences Division 000001574 690__ $$aPritzker School of Medicine 000001574 691__ $$aEvolutionary Biology 000001574 7001_ $$aSosa, Timothy$$uUniversity of Chicago 000001574 72012 $$aShannon J. Hackett 000001574 72012 $$aMichael I. Coates 000001574 72014 $$aMark Webster 000001574 72014 $$aDavid Jablonski 000001574 72014 $$aWilliam L. Smith 000001574 8564_ $$9a4e874ef-6d95-4914-b19a-ea314e54dc31$$s2324451$$uhttps://knowledge.uchicago.edu/record/1574/files/Sosa_uchicago_0330D_14164.pdf$$eEmbargo (2019-12-13) 000001574 909CO $$ooai:uchicago.tind.io:1574$$pDissertations$$pGLOBAL_SET 000001574 983__ $$aDissertation