Altitudinal seasonality as a potential driver of morphological diversification in rear-edge bird populations

作     者：José Luis Tellería Irene Hernández-Tellez Iván de la Hera José Ignacio Aguirre Alejandro Onrubia José Luis Tellería;Irene Hernández-Tellez;Iván de la Hera;José Ignacio Aguirre;Alejandro Onrubia

作者机构：Department of BiodiversityEcology and EvolutionUniversidad Complutense28040MadridSpain Department of Integrative BiologyOklahoma State UniversityStillwaterOKUSA Fundaci on MigresTarifa11380CadizSpain 

出 版 物：《Avian Research》 (鸟类学研究（英文版）)

年 卷 期：2022年第13卷第3期

页      面：267-274页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0905[农学-畜牧学] 0906[农学-兽医学] 0713[理学-生态学] 

基　　金：contribution to the project CGL201785637-P(Life at the border:population differentiation of forest birds south of the Palearctic)granted by the Spanish Ministry of Science Innovation and Universities 

主　　题：Altitudinal movements Flight apparatus Population diversification Snow cover effects 

摘      要：Populations at the low latitude limits of a species range(rear-edge populations)are often considered more vulnerable to climate ***,their ability to track different environmental settings at a regional scale has been widely overlooked,although this may be relevant to accurately assess their adaptive capacity to cope with ongoing *** we tested whether the endemic African Chaffinch(Fringilla coelebs africana)tracks environmental changes(*** temperatures,snow cover)by rearranging their numbers between seasons(spring ***)along the altitude gradients of its northwestern African *** additionally tested whether these seasonal changes in abundance were paralleled by morphological variation,suggesting a process of population *** assessed African Chaffinch abundance in tree covered farmland and woodland sites distributed along an altitude gradient in spring and *** addition,we captured and measured chaffinches within the study gradient to explore the patterns of morphological *** results showed that chaffinches shifted to lowlands from snow covered highlands during *** addition,highland individuals showed longer and more concave wings than their lowland *** morphological traits are usually related to flight efficiency in migratory birds,which suggest the presence of altitudinal movements aimed to track the environmental seasonality caused by *** results suggest a potential role of altitudinal seasonality as a driver of regional diversification within the African Chaffinch populations,which could be occurring in other North African avian species given their relatively high endemicity in the *** evolutionary and conservation implications of these displacements have been often overlooked despite they can shape the adaptive capacity of rear-edge bird populations to face the ongoing environmental changes in this peripheral area of the Palearctic.