La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Does microhabitat use affect population differentiation? A test with southwestern Palaearctic forest birds (2022)
Titre original:	Does microhabitat use affect population differentiation?
Auteurs :	Adrián Talavera, Auteur ; José Luis Tellería, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (163(4) October, 2022)
Article en page(s) :	923-929
Langues:	Anglais
Mots-clés:	Dispersal ability ; Foraging substrata ; Microhabitat ; Phylogeny relatedness ; Subspecies
Résumé :	We tested whether microhabitat use affects dispersal and population differentiation in forest birds of the southwestern Palaearctic, a link previously suggested in Neotropical birds. To approach this, the number of subspecies within 32 species was used as a metric of population differentiation and was related to their feeding substrata and seasonal changes in abundance (a surrogate of dispersal) in a mountain range (Guadarrama Mountains, Central Spain). Multivariate analyses in which the effect of range size (a main correlate of within-species diversification) and phylogeny relatedness were considered, showed that those birds adapted to exploit the tree canopy had lower seasonal changes in abundance and more subspecies than ground-dweller birds. Our results support a cause-effect link between the use of stable resources in the canopy, seasonal movements and population differentiation of birds from temperate forests of the southwestern Palaearctic.
En ligne :	https://doi.org/10.1007/s10336-022-01998-x

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