https://www.opendatalapalma.es/pages/avisolegalhttps://www.opendatalapalma.es/pages/avisolegal
Contains data from: * Municipalities of the Island of La Palma (GRAFCAN, Cabildo de La Palma, Government of the Canary Islands)
Population entities (ISTAC, Government of the Canary Islands)
Population centres (ISTAC, Government of the Canary Islands)
As of January 2025, roughly ******* inhabitants were living on ************* Tenerife had the largest number of inhabitants at *******. Overall, the population of Spain in 2025, by gender and autonomous community shows that the ************** were the seventh-largest autonomous community in Spain when ranked by population with **** million male and **** million female inhabitants. The most populous autonomous communities were *********, *********, and ******. The largest age group in the Canary Islands was that made of people aged between 50 and 54, accounting for ******* inhabitants.
https://www.opendatalapalma.es/pages/avisolegalhttps://www.opendatalapalma.es/pages/avisolegal
Contains data from: * Municipalities of the Island of La Palma (GRAFCAN, Cabildo de La Palma, Government of the Canary Islands)
Population entities (ISTAC, Government of the Canary Islands)
Population centres (ISTAC, Government of the Canary Islands)
Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
License information was derived automatically
Evolutionary molecular studies of island radiations may lead to insights in the role of vicariance, founder events, population size and drift in the processes of population differentiation. We evaluate the degree of population genetic differentiation and fixation of the Canary Islands blue tit subspecies complex using microsatellite markers and aim to get insights in the population history using coalescence based methods. The Canary Island populations were strongly genetically differentiated and had reduced diversity with pronounced fixation including many private alleles. In population structure models, the relationship between the central island populations (La Gomera, Tenerife and Gran Canaria) and El Hierro was difficult to disentangle whereas the two European populations showed consistent clustering, the two eastern islands (Fuerteventura and Lanzarote) and Morocco weak clustering, and La Palma a consistent unique lineage. Coalescence based models suggested that the European mainland forms an outgroup to the Afrocanarian population, a split between the western island group (La Palma and El Hierro) and the central island group, and recent splits between the three central islands, and between the two eastern islands and Morocco, respectively. It is clear that strong genetic drift and low level of concurrent gene flow among populations have shaped complex allelic patterns of fixation and skewed frequencies over the archipelago. However, understanding the population history remains challenging; in particular, the pattern of extreme divergence with low genetic diversity and yet unique genetic material in the Canary Island system requires an explanation. A potential scenario is population contractions of a historically large and genetically variable Afrocanarian population, with vicariance and drift following in the wake. The suggestion from sequence-based analyses of a Pleistocene extinction of a substantial part of North Africa and a Pleistocene/Holocene eastward re-colonisation of western North Africa from the Canaries remains possible.
CC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
License information was derived automatically
The Crassulacean genus Aeonium is a well-known example for plant species radiation on oceanic archipelagos. However, while allopatric speciation among islands is documented for this genus, the role of intra-island speciation due to population divergence by topographical isolation or ecological heterogeneity has not yet been addressed. The aim of this study was to investigate intraspecific genetic structures and to identify spatial and ecological drivers of genetic population differentiation on the island scale. We analyzed inter simple sequence repeat variation within two island-endemic Aeonium species of La Palma: one widespread generalist that covers a large variety of different habitat types (Ae. davidbramwellii) and one narrow ecological specialist (Ae. nobile), in order to assess evolutionary potentials on this island. Gene pool differentiation and genetic diversity patterns were associated with major landscape structures in both species, with phylogeographic implications. However, overall levels of genetic differentiation were low. For the generalist species, outlier loci detection and loci–environment correlation approaches indicated moderate signatures of divergent selection pressures linked to temperature and precipitation variables, while the specialist species missed such patterns. Our data point to incipient differentiation among populations, emphasizing that ecological heterogeneity and topographical structuring within the small scales of an island can foster evolutionary processes. Very likely, such processes have contributed to the radiation of Aeonium on the Canary Islands. There is also support for different evolutionary mechanisms between generalist and specialist species.
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https://www.opendatalapalma.es/pages/avisolegalhttps://www.opendatalapalma.es/pages/avisolegal
Contains data from: * Municipalities of the Island of La Palma (GRAFCAN, Cabildo de La Palma, Government of the Canary Islands)
Population entities (ISTAC, Government of the Canary Islands)
Population centres (ISTAC, Government of the Canary Islands)