Destacados
- ¡Abierta convocatoria para proyectos de investigación en la ICTS- Doñana!
- La Fundación Jaime González-Gordon ofrece cuatro becas para el desarrollo de Trabajos de Fin de Máster sobre Doñana
- Cinco contratos para desarrollar la tesis doctoral en la Estación Biológica de Doñana - CSIC
- Actividades de la Estación Biológica de Doñana en la Noche Europea de los Investigadores
- La ICTS-RBD se prepara para la 30ª Campaña de Anillamiento de Paseriformes Migratorios en Doñana
Noticias
Microevolutionary and demographic consequences of an evolutionary transition to flightlessness
Although the pervasiveness of intraspecific wing-size polymorphism and transitions to flightlessness have long captivated biologists, the micro-evolutionary and demographic outcomes of shifts in dispersal ability are not yet well understood and have been seldom studied at early stages of diversification. A new study developed at Estación Biológica de Doñana (CSIC) has employed genomic data to infer the consequences of dispersal-related trait variation in short-winged and long-winged forms of the taxonomically controversial Corsican grasshopper (Chorthippus corsicus).
The analyses showed lack of contemporary hybridization between sympatric long- and short-winged forms and phylogenomic reconstructions revealed their taxonomic distinctiveness, rejecting the hypothesis of intraspecific wing polymorphism and supporting the presence of two distinct species: the short-winged Chorthippus corsicus and the long-winged Chorthippus pascuorum. Molecular data estimated that the two species diverged <1.5 million years ago and are currently reproductively isolated. Although populations of the two species present a marked genetic structure and have experienced parallel demographic histories, the study has revealed that reduced dispersal has limited gene flow among populations and fueled diversification in the short-winged Chorthippus corsicus.
The results of this study illustrate how dispersal reduction can speed up genetic diversification and increase the opportunity for speciation in geographical isolation.
Reference:
Ortego J, Gutiérrez-Rodríguez J, Noguerales V (2021) Demographic consequences of dispersal?related trait shift in two recently diverged taxa of montane grasshoppers. Evolution, in press. https://doi.org/10.1111/evo.14205
https://doi.org/10.1111/evo.14205- Laboratorio de Ecología Molecular
- Laboratorio SIG y Teledetección (LAST)
- Laboratorio de Ecología Química
- Laboratorio de Ecología Acuática
- Laboratorio de Ecofisiología
- Laboratorio de Isótopos Estables
- Unidad de Experimentación Animal
- Visita virtual
- Unidad de Seguimiento
- Laboratorio de Camaras climaticas