logo4 Evolution is progress—                          
progress is creativity.        

Ring Species

Ring species is a term introduced by Arthur Cain when elaborating on speciation [1]. Ring species consist of overlapping populations with only subtle differences. The traits change continuously, so that the more geographically distant the more pronounced the differences. Only on both sides of a geographical barrier there are sharp differences between the populations' traits.

A ring species is illustrated by the picture below.
Species Ring
The mountain ridge symbolizes a geographical barrier. But a geographical barrier can be any geographical obstacle to a species dissemination depending on a species capabilities to move, a river or a highway for instance.

Tags: Speciation Theory

Categories: Evolutionary Biology


(c) Mato Nagel, Weißwasser 2004-2013, Disclaimer