Light-level geolocators confirm resident status of a Southern European Common Crossbill population

Alonso, Daniel; Arizaga, Juan; Meier, Christoph M.; Liechti, Félix

doi:10.1007/s10336-016-1388-5

Cited by 11 publications

(8 citation statements)

References 21 publications

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“…We used Illumina sequencing of variable insert size libraries to assemble a Cassia crossbill draft genome to serve as a reference onto which we mapped GBS reads. We compare genetic differentiation of the three P. halepensis ‐associated subspecies to population samples of curvirostra from regions with less stable seed resources: Scotland where curvirostra feeding on P. sylvestris and various non‐native conifers are nomadic (Marquiss & Rae, ; Summers et al ., ) and from the Pyrenees in northern Spain where crossbills feed on Pinus uncinata and P. sylvestris (Senar et al ., ; Clouet, ; Alonso et al ., ; Fig. ).…”

Section: Introductionmentioning

confidence: 93%

Resource stability and geographic isolation are associated with genome divergence in western Palearctic crossbills

Edelaar

Uckele

Mezquida

et al. 2018

J of Evolutionary Biology

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While many conifers produce annually variable seed crops, serotinous species (which hold seeds in cones for multiple years) represent unusually stable food resources for seed predators. Such stability is conducive to residency and potentially population divergence of consumers as exemplified by the Cassia crossbill (Loxia sinesciuris) in North America. We used genotyping by sequencing (GBS) to test whether three Mediterranean subspecies of common crossbills (L. curvirostra) associated with the serotinous Aleppo pine (Pinus halepensis) were more genetically distinct than European crossbills associated with nonserotinous conifers. We assembled a Cassia crossbill draft genome as a reference for mapping GBS reads and as a first step towards a more contiguous genome assembly. We found clear patterns of genetic divergence for each of the P. halepensis-associated subspecies. Geographic isolation, as promoted by resource stability and residency, is associated with genetic divergence of two of these subspecies. However, geographic isolation cannot account for divergence of L. c. hispana. Instead, resource stability likely contributed to divergence by reducing dispersal and increasing resource competition that may limit breeding by immigrants. In contrast, we found no differentiation among common crossbills associated with less stable resources, and only slight differentiation between common crossbills and parrot crossbills (L. pytyopsittacus). The substantial morphological divergence between common and parrot crossbills has likely originated or been maintained by selection despite gene flow generated by spatiotemporal resource fluctuation. Our results indicate that phenological as well as morphological characteristics of conifers have influenced crossbill diversification, and suggest a possible link between resource stability and population divergence.

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Section: Introductionmentioning

confidence: 93%

Resource stability and geographic isolation are associated with genome divergence in western Palearctic crossbills

Edelaar

Uckele

Mezquida

et al. 2018

J of Evolutionary Biology

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“…Other criteria could be and are being developed to assign Crossbills to specific, given pines, e.g. vocalizations (Groth 1993), genetics (Edelaar et al 2012, Parchman et al 2016), isotopic signatures (Marquiss et al 2008, 2012, Arizaga et al 2014, 2015) and spatial tracking studies (Alonso et al 2017). Until this work is completed, this potential bias in the data cannot be fully assessed.…”

Section: Discussionmentioning

confidence: 99%

“…In view of the potential for movement and habitat selection by Crossbills, it is important to improve our understanding of dispersal of these birds (e.g. Alonso et al 2017) and to what extent given populations are able to respond to habitat loss or degradation. Ringing recoveries and telemetry may contribute to this, as well as other approaches.…”

Section: Discussionmentioning

confidence: 99%

“…Birds were captured with 16‐mm‐mesh mist‐nets when coming down from the tree tops to drink water in springs or to feed on minerals on walls or sites traditionally used to provide salt for cattle (Alonso et al 2017). The number of mist‐nets used, their position and the sampling months varied among sites, as our goal was to capture as many Crossbills as possible at each site, and the sampling efforts and periods were adjusted to local circumstances.…”

Section: Methodsmentioning

confidence: 99%

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Morphological divergence among Spanish Common Crossbill populations and adaptations to different pine species

Alonso¹,

Fernández-Eslava

Edelaar

et al. 2020

Ibis

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Crossbills (Loxia spp.) provide a classical avian model of ecological specialization on food resources. Previous studies have suggested that morphometric, genetic and vocal diversification among Common Crossbill Loxia curvirostra populations is better explained by ecological distance (use of different conifers) than by geographical distance, indicating that populations have diverged adaptatively. We tested for adaptive divergence in Iberian crossbills using bill and body size measurements of 6082 crossbills from 27 sites, each consisting of a dominant or single pine (Pinus) of four possible species. Crossbills using different pines differed significantly in body size and bill size and shape. There was no correlation between geographical and morphological distance among sampling sites, consistent with the hypothesis that the morphological divergence of Iberian crossbills is shaped by their ecological differences (foraging on alternative conifers) rather than geographical distance. However, for unknown reasons, Common Crossbills foraging on Pinus sylvestris in Iberia have on average much smaller bills than Parrot Crossbills Loxia pytyopsittacus feeding on the same pine species in northern Europe. The extent to which crossbills specialize on Iberian P. sylvestris remains to be established. Specialization on conifers with overlapping geographical distributions may be facilitated by matching habitat choice of crossbills as a function of their local intake rates.

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“…Este descenso podría reflejar o bien un abandono de la zona (Alonso et al, 2016) o un cambio en el comportamiento de los piquituertos (Cramp & Perrins, 1994). Las aves fueron capturadas en puntos que son utilizados para la ingesta de mineral (sales).…”

Section: Discussionunclassified

Dinámica estacional de la abundancia de piquituerto común Loxia curvirostra L., 1756 en dos localidades del Pirineo Navarro e implicaciones para su seguimiento mediante anillamiento.

Alonso¹,

Martínez²

2017

Munibe, Cienc. nat.

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ResumenLas estaciones de anillamiento de aves de esfuerzo constante realizan un papel clave en el seguimiento de poblaciones a largo plazo. El periodo de muestreo de este tipo de estaciones se ajusta a la época de nidificación de las especies más abundantes, en el caso de España entre los meses de abril-mayo y agosto. En consecuencia, aquellas especies cuya reproducción no coincida con la del grueso de especies quedan, invariablemente, poco o indebidamente representadas en este tipo de programas de seguimiento. Lo mismo ocurre con especies que, debido a su comportamiento, requieren de técnicas de muestreo especiales o específicas para su monitorización. Ejemplo de tales excepciones sería el piquituerto común Loxia curvirostra, L. 1758. En este artículo se describe el patrón estacional de la abundancia de piquituertos en dos localidades del Pirineo Navarro empleando datos de anillamiento obtenidos durante un periodo de 22 años. Los patrones observados fueron homogéneos entre ambos puntos de muestreo. Nuestros resultados sugieren que el promedio de capturas entre los meses de enero y abril podría utilizarse como un índice de la abundancia de individuos adultos durante el periodo de cría en el Pirineo Occidental.Palabras clave: Anillamiento, aves forestales, Bigüézal, fenología, pinares, Uztárroz. -4547 Daniel Alonso 1 , Juan Arizaga 1* Dinámica estacional de la abundancia de piquituerto común Loxia curvirostra L., 1756 en dos localidades del Pirineo Navarro e implicaciones para su seguimiento mediante anillamiento. 95Abundancia de Piquituerto en Pirineo Navarro Munibe, Cienc. nat. 65, 2017 • pp. 95-105 • Donostia/San Sebastián • ISSN 0214-7688 • eISSN 2172Seasonal abundance patterns of common crossbills Loxia curvirostra L., 1756 in two localities of the Navarran Pyrenees and implications for its survey through ringing. AbstractConstant effort bird ringing stations develop a relevant role in long-term population monitoring programs. The sampling period in these stations coincides with the most abundant species' breeding period; in Spain this lasts from April or May to August. Thus, those birds breeding in other periods would remain poorly represented in this type of programs. This is also applicable to species needing very specific sampling techniques. The common crossbill Loxia curvirostra, L. 1758 is an example of this type of species. The aim of this paper is to describe the seasonal abundance patterns of crossbills in the Pyrenees in order to find a useful method to estimate long-term population trendsusing data obtained during a 22-year ringing program at two localities in the Pyrenean region of Navarre. The patterns observed were homogeneous in the two sampling localities. The mean number of captures from January to April could be used as an index of abundance of adult breeding birds.

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Light-level geolocators confirm resident status of a Southern European Common Crossbill population

Cited by 11 publications

References 21 publications

Resource stability and geographic isolation are associated with genome divergence in western Palearctic crossbills

Resource stability and geographic isolation are associated with genome divergence in western Palearctic crossbills

Morphological divergence among Spanish Common Crossbill populations and adaptations to different pine species

Dinámica estacional de la abundancia de piquituerto común Loxia curvirostra L., 1756 en dos localidades del Pirineo Navarro e implicaciones para su seguimiento mediante anillamiento.

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