NAGIOS: RODERIC FUNCIONANDO

Patterns of genetic variability and habitat occupancy in Crepis triasii (Asteraceae) at different spatial scales: insights on evolutionary processes leading to diversification in continental islands

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Patterns of genetic variability and habitat occupancy in Crepis triasii (Asteraceae) at different spatial scales: insights on evolutionary processes leading to diversification in continental islands

dc.contributor.author	Mayol, María	es_ES
dc.contributor.author	Palau, Carles	es_ES
dc.contributor.author	Rosselló Picornell, Josep Antoni	es_ES
dc.contributor.author	González-Martínez, Santiago C.	es_ES
dc.contributor.author	Molins, Arántzazu	es_ES
dc.contributor.author	Riba, Miquel	es_ES
dc.date.accessioned	2015-06-19T10:21:24Z
dc.date.available	2015-06-19T10:21:24Z
dc.date.issued	2012	es_ES
dc.identifier.citation	Annals of Botany Vol. 109 Issue 2: pp. 429-441	es_ES
dc.identifier.uri	http://hdl.handle.net/10550/44582
dc.description.abstract	Background and AimsArchipelagos are unique systems for studying evolutionary processes promoting diversification and speciation. The islands of the Mediterranean basin are major areas of plant richness, including a high proportion of narrow endemics. Many endemic plants are currently found in rocky habitats, showing varying patterns of habitat occupancy at different spatial scales throughout their range. The aim of the present study was to understand the impact of varying patterns of population distribution on genetic diversity and structure to shed light on demographic and evolutionary processes leading to population diversification in Crepis triasii, an endemic plant from the eastern Balearic Islands.MethodsUsing allozyme and chloroplast markers, we related patterns of genetic structure and diversity to those of habitat occupancy at a regional (between islands and among populations within islands) and landscape (population size and connectivity) scale.Key ResultsGenetic diversity was highly structured both at the regional and at the landscape level, and was positively correlated with population connectivity in the landscape. Populations located in small isolated mountains and coastal areas, with restricted patterns of regional occupancy, were genetically less diverse and much more differentiated. In addition, more isolated populations had stronger fine-scale genetic structure than well-connected ones. Changes in habitat availability and quality arising from marine transgressions during the Quaternary, as well as progressive fragmentation associated with the aridification of the climate since the last glaciation, are the most plausible factors leading to the observed patterns of genetic diversity and structure.ConclusionsOur results emphasize the importance of gene flow in preventing genetic erosion and maintaining the evolutionary potential of populations. They also agree with recent studies highlighting the importance of restricted gene flow and genetic drift as drivers of plant evolution in Mediterranean continental islands.	es_ES
dc.subject	Allozymes	es_ES
dc.subject	Balearic flora	es_ES
dc.subject	chloroplast microsatellites	es_ES
dc.subject	continental islands	es_ES
dc.subject	Crepis triasii	es_ES
dc.subject	fragmentation	es_ES
dc.subject	genetic diversity	es_ES
dc.subject	genetic drift	es_ES
dc.subject	Quaternary	es_ES
dc.subject	spatially structured populations	es_ES
dc.subject	SGS	es_ES
dc.title	Patterns of genetic variability and habitat occupancy in Crepis triasii (Asteraceae) at different spatial scales: insights on evolutionary processes leading to diversification in continental islands	es_ES
dc.type	journal article	es_ES
dc.identifier.doi	10.1093/aob/mcr298	es_ES
dc.identifier.idgrec	090566	es_ES
dc.identifier.idgrec	089509