Occurring in different places; usually refers to geographical separation of species
The geographical isolation of two or more populations or species Also, speciation that occurs in geographical isolation from the main population of the parent species It is thought to be the dominant mode of speciation A small population of the species is isolated long enough for genetic drift and natural selection to make it different enough in either reproductive behaviour or mechanisms so that if and when it rejoins the original species it is too distinct to interbreed There is debate in the evolutionary biological discipline as to whether different ecological behaviour and the adaptations needed to survive in them are the result of speciating selection, or follow from selection between the original species and the now reproductively distinct new species which have become that way through drift Most think that selection is relevant only after allopatric speciation, although recent work has revived the sympatric speciation model
the condition of two organisms or groups of organisms inhabiting different places
occurring in different places; usually refers to geographical separation of populations (Ricklefs 1979: 865) The populations may exhibit divergence in behavior, morphology, or genetic composition
Allopatry Pertaining to populations or species that occupy exclusive geographical regions, i e they have ranges that do not overlap (cf sympatric, parapatric) (F)