ANTH 1001 Lecture Notes - Lecture 8: Species Problem, Macroevolution, Microevolution
Document Summary
A group of interbreeding populations that are reproductively isolated from other such groups. Only members of the same species can mate and produce viable offspring (offspring that can reproduce) Emphasizes unique traits or behaviors that allow individual members of the same species to recognize each other for the purposes of mating. A group of organisms exploiting a single ecological adaptation. Species that live together in the same habitat must have different niches in order to avoid being in direct competition with other species. When a single kind of organism diversifies to fill many available niches. Tends to follow the origin of evolutionary novelty. Sometimes is the only one that can be used. Defines species as evolutionary lineages (ancestral-descendant sequences of populations) with their own unique identity. Chronospecies - each species within an anagenetic line. Speciation occurring in the absences of geographic isolation. Evolutionary change proceeds gradually through accumulated small-scale changes.
