Search results
Population expands around an geographical barrier
- A ring species is formed when a population expands around an geographical barrier in such a way that the expanding fronts have become reproductively isolated when they come into secondary contact (Irwin et al. 2001).
academic.oup.com › evolut › article-abstractBarriers to gene flow and ring species formation | Evolution ...
People also ask
What is a ring species?
Are ring species a perfect demonstration of speciation?
What is ring species & speciation?
What is ring species formation?
The idea is that this continuum of salamanders — called a ring species — represents the evolutionary history of the lineage, as it split into two. Ensatina has been recognized as a ring species since the 1940s, when biologist Robert C. Stebbins trooped up and down California to investigate its range. Since then, several generations of ...
Discovering a ring species. Robert Stebbins examining an Ensatina salamander in 1951. Photo courtesy of the Museum of Vertebrate Zoology Archives. Ensatina ‘s basic story was laid out by Robert Stebbins 30 years before Tom was born in 1977. Based on the ring-like distribution of the different forms, Robert had proposed that the species ...
The biologist Ernst Mayr championed the concept of ring species, stating that it unequivocally demonstrated the process of speciation. A ring species is an alternative model to allopatric speciation, "illustrating how new species can arise through 'circular overlap', without interruption of gene flow through intervening populations…"
Feb 1, 2017 · Abstract. Ring species are groups of organisms that dispersed along a ring-shaped region in such a way that the two ends of the population that meet after many generations are reproductively isolated. They provide a rare opportunity to understand the role of spatial structuring in speciation.
Jan 18, 2001 · A ring species, in which a chain of intergrading populationsencircles a barrier and the terminal forms coexist without interbreeding,provides a situation in which...
- Darren E. Irwin, Darren E. Irwin, Staffan Bensch, Trevor D. Price
- 2001
Most importantly, this work shows that the continuum of species forma-tion that Mayr and Dobzhansky praised in circular over-laps is found in biological systems currently described as ‘rings of species’, in addition to the idealized ‘ring species’. Keywords: circular overlaps, gene flow, hybridization, spe-ciation.
Blackmon, Heath; and Demuth, Jeffery P (October 2012) Ring Species and Speciation. In: eLS. John Wiley & Sons, Ltd: Chichester. DOI: 10.1002/9780470015902.a0001751.pub3. Online posting date: 15th October 2012. intergrading populations except in one area, where a sharp morphological discontinuity is found.
