干旱区生态环境知识资源中心(Arid): The ghost of connections past: A role for mainland vicariance in the isolation of an insular population of the red-billed chough (Aves: Corvidae)

Arid

DOI	10.1111/jbi.13977
	The ghost of connections past: A role for mainland vicariance in the isolation of an insular population of the red-billed chough (Aves: Corvidae)
	Morinha, Francisco; Mila, Borja; Davila, Jose A.; Fargallo, Juan A.; Potti, Jaime; Blanco, Guillermo
通讯作者	Mila, B
来源期刊	JOURNAL OF BIOGEOGRAPHY
ISSN	0305-0270
EISSN	1365-2699
出版年	2020
卷号	47 期号:12 页码:2567-2583
英文摘要	Aim Oceanic islands have often been colonized by small groups of individuals dispersing from the nearest mainland, giving rise to insular populations characterized by locally adapted phenotypes and low genetic diversity. Alternatively, due to past geo-climatic changes, the present-day distribution of the species may not correspond to that found at the time of the original colonization so that the current mainland distribution may not include the original source area, leading to erroneous assumptions regarding colonization history. Here, we use patterns of genetic variation to evaluate alternative colonization scenarios of an insular passerine in the Canary Islands. Location La Palma (Canary Islands), Northern Africa and the Iberian Peninsula. Taxon Red-billed chough (Pyrrhocorax pyrrhocorax). Methods We use phylogeographical and coalescent analyses of mitochondrial DNA sequences and 10 microsatellite loci, together with Bayesian demographic modelling, to determine whether choughs on the island of La Palma originate from (a) present-day populations in Iberia, (b) present-day populations in the mountains of inland Morocco or (c) former populations in coastal Morocco, where suitable habitat existed in the past. Results Both the mitochondrial and nuclear datasets indicate that the chough population on La Palma is genetically well differentiated from those in Iberia and Morocco, and that La Palma choughs are more closely related to choughs in Iberia than to those in Morocco. Genetic diversity in La Palma is lower than that of mainland populations, but shows no evidence of past bottlenecks. The best supported demographic model to explain the origin of La Palma choughs that is congruent with both genetic datasets includes a 'ghost' population closely related to Iberia, from which the insular population diverged within the last 30,000 years. Main conclusions Our results are most consistent with the existence of a former connection between La Palma and Iberia along the North African coast, when suitable habitat was found there. Subsequent desertification of these coastal areas led to local extinctions that restricted gene flow between Iberia and the islands, promoting genetic differentiation. Our results provide a counterintuitive solution to a biogeographical enigma, and could help resolve the colonization history of other systems with similarly complex climatic pasts.
英文关键词	Divergence genetic diversity islands Macaronesia paleoclimate phylogeography vicariance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000574694300001
WOS关键词	COMPLEX EVOLUTIONARY HISTORY ; DNA SEQUENCE DATA ; CANARY-ISLANDS ; GENETIC-STRUCTURE ; PERIPHERAL-POPULATIONS ; COLONIZATION HISTORY ; DENDROCOPOS-MAJOR ; TENERIFFAE-GROUP ; MITOCHONDRIAL ; DIVERSIFICATION
WOS类目	Ecology ; Geography, Physical
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326609
作者单位	[Morinha, Francisco; Mila, Borja; Fargallo, Juan A.; Blanco, Guillermo] CSIC, Natl Museum Nat Sci, Madrid, Spain; [Davila, Jose A.] UCLM, Inst Invest Recursos Cineget IREC, CSIC, JCCM, Ciudad Real, Spain; [Potti, Jaime] CSIC, Estn Biol Donana, Seville, Spain
推荐引用方式 GB/T 7714	Morinha, Francisco,Mila, Borja,Davila, Jose A.,et al. The ghost of connections past: A role for mainland vicariance in the isolation of an insular population of the red-billed chough (Aves: Corvidae)[J],2020,47(12):2567-2583.
APA	Morinha, Francisco,Mila, Borja,Davila, Jose A.,Fargallo, Juan A.,Potti, Jaime,&Blanco, Guillermo.(2020).The ghost of connections past: A role for mainland vicariance in the isolation of an insular population of the red-billed chough (Aves: Corvidae).JOURNAL OF BIOGEOGRAPHY,47(12),2567-2583.
MLA	Morinha, Francisco,et al."The ghost of connections past: A role for mainland vicariance in the isolation of an insular population of the red-billed chough (Aves: Corvidae)".JOURNAL OF BIOGEOGRAPHY 47.12(2020):2567-2583.