ANT101H5 Lecture Notes - Ecological Niche, Postorbital Bar, Adaptive Radiation
Document Summary
A species way of life considered in the context of its environment. Environment-ecology dictates species, species adapt to habitat, changes-origin of species. Rapid diversification of an evolving population as it adapts to a variety of available niches. Climatic event-change in speciation glaciers-15% of earths water froze. Dropping sea levels expose continent bridges increase carniforous trees-speciation. Probably occurred 65 mil years ago in paleoscene epoch-orgin or primates. Major periods & epochs of evolution of life. Beginning of separation between mouth & nasal cavity. Permian deposits show mammal like reptiles permain deposists mammals-reduction of body appendix-move to side differentiation in dentition-mammal like reptiles. 1st mammals appeared: end of triassic period (190 mil ya) enhanced smell & hearing. Cenozoic (age of mammals) (including 1st appearance of primates) Proliferation of deciduous forests adaptive radiation of mammals -eco niches open up dinosaurs go extinct, global climate change temperature decreased. Before-high energy requirement-hard to have a proper diet.
