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Source text - English The splitting of a population into separate species requieres that subdivisions of the population become reproductively isolated from each other. The most straight-forward way for this to happen is for the subpopulations to become geographically separated.
The evolution of two populations of tuft-eared squirrels (Sciurus aberti) on the north and south rims of the Grand Canyon in the American Southwest is an example of allopatric speciation. Phenotipic and molecular characterization of these squirrels suggest that they evolved from de same parent population. The formidable canyon that separates them has reduced interpopulational gene flow to near zero. Consequently, the two populations have developed their own identities.
Speciation may also occur in the absence of any geographical barrier. This process, called sympatric speciation, requires that subpopulations develop reproductive isolation while they occupy the same territory.
Translation - Spanish La división de una población en especies distintas requiere que las subdivisiones de la población se aíslen entre sí reproductivamente. La forma más directa en que esto puede suceder es que las subpoblaciones se vean geográficamente separadas.
La evolución de dos poblaciones de ardillas penacho-espigadas (Sciurus aberti) en las orillas norte y sur del Gran Cañón, en el sudeste americano, es un ejemplo de especiación alopátrica. La caracterización fenotípica y molecular de estas ardillas sugiere que se desarrollaron a partir de la misma población parental. El enorme cañón que las separa ha reducido el flujo génico casi a cero. En consecuencia las dos poblaciones han desarrollado cada una su propia identidad.
La especiación puede ocurrir también en ausencia de barreras geográficas. Este proceso, llamado especiación simpátrica, requiere que las subpoblaciones se vuelvan reproductivamente aisladas, al tiempo que ocupan el mismo territorio.
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Years of experience: 23. Registered at ProZ.com: Aug 2007.
I'm a Biology student about to graduate and start working to recieve a PhD degree, probably in genetics. My specialization is the translation of scientific publications (reports, articles, papers). Biology conceives a wide spectrum of subjects such as biochemistry, genetics, ecology, botany, zoology and much more.
Keywords: Biology, Zoology, Genetics, Biochemistry, Botany, translation of scientific publications, papers, articles
Biología, Zoología, Genética. See more.Biology, Zoology, Genetics, Biochemistry, Botany, translation of scientific publications, papers, articles
Biología, Zoología, Genética, Bioquímica, Botánica, traducción de publicaciones científicas, artículos. See less.
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