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The standard example of ring species is the circumpolar species "ring" of gulls of genus Larus.The range of these gulls forms a ring around the North Pole; there are seven populations and each population can breed with the previous and … What does ring species mean? A group of closely related organisms, populations of which are distributed geographically in a ring-shaped cline, diverging in opposite directions and culminating in one point on the ring where two populations coexist but cannot interbreed. Larus gulls []. It is a ring species, and whereas various taxonomic arrangements are possible, no taxonomic changes are proposed. Here we discuss the three classical ring-species examples and the actual state of knowledge. it's a question of where do you put the boundary between this species and that species. Information and translations of ring species in the most comprehensive dictionary definitions resource on the web. The ring species phenomenon is interesting in what it demonstrates, but understand it is also fairly rare. The best example is probably the ensatina salamander that lives in a horseshoe-shape ring around the Sonoran desert. This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic, 2.0 Generic and 1.0 Generic license. Therefore the species is only showing some variations (as varieties or subspecies) based on … Definition of ring species in the Definitions.net dictionary. Unable to survive in the desert, they spread out along the mountain valleys around the desert instead. ring species is more a problem for the definition of the word species than it is for evolution. They are still following natural mechanisms of change over time. However, doubts have arisen as to whether this represents an actual ring species. In ecology, a ring species is a series of related, neighboring populations. There have only been around 20 or so proposed examples, and only a handful of those hypotheses have been confirmed through genetic analysis. The major downfall of the Ring Species concept is that the end populations, which by definition cannot interbreed, have been found to interbreed even in the wild, typically with fertile offspring. In 1925 Jonathan Dwight found the genus to form a chain of varieties around the Arctic Circle. The classic ring species is the Larus gull. To those who don't know what ring species are, they are a species that are geographically distributed into a ring. Meaning of ring species. : You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. Ring Species. Various taxonomic arrangements are possible, no taxonomic changes are proposed Creative Commons Alike. 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