Universidad Complutense de Madrid
E-Prints Complutense

Surprising migration and population size dynamics in ancient Iberian brown bears (Ursus arctos)



Último año

Valdiosera Morales, Cristina y García Garitagoitia, José Luis y García García, Nuria y Doabrio Villarejo, Ignacio y Thomas, Mark G. y Hänni, Catherine y Arsuaga, Juan Luis y Barnes, Ian y Hofreiter, Michael y Orlando, Ludovic y Götherström, Anders (2008) Surprising migration and population size dynamics in ancient Iberian brown bears (Ursus arctos). Proceedings of the National Academy of Sciences of the United States of America, 115 (13). pp. 5123-5128. ISSN 0027-8424

[img] PDF

URL Oficial: http://www.pnas.org/


The endangered brown bear populations (Ursus arctos) in Iberia
have been suggested to be the last fragments of the brown bear
population that served as recolonization stock for large parts of
Europe during the Pleistocene. Conservation efforts are intense,
and results are closely monitored. However, the efforts are based
on the assumption that the Iberian bears are a unique unit that has
evolved locally for an extended period. We have sequenced mitochondrial
DNA (mtDNA) from ancient Iberian bear remains and
analyzed them as a serial dataset, monitoring changes in diversity
and occurrence of European haplogroups over time. Using these
data, we show that the Iberian bear population has experienced a
dynamic, recent evolutionary history. Not only has the population
undergone mitochondrial gene flow from other European brown
bears, but the effective population size also has fluctuated substantially.
We conclude that the Iberian bear population has been
a fluid evolutionary unit, developed by gene flow from other
populations and population bottlenecks, far from being in genetic
equilibrium or isolated from other brown bear populations. Thus,
the current situation is highly unusual and the population may in
fact be isolated for the first time in its history.

Tipo de documento:Artículo
Palabras clave:Bottleneck; Gene flow; Mitochondrial DNA; Ancient DNA; Serial coalescent simulations
Materias:Ciencias > Geología > Paleontología
Código ID:12250
Depositado:16 Feb 2011 10:53
Última Modificación:11 Dic 2018 08:42

Descargas en el último año

Sólo personal del repositorio: página de control del artículo