首页|Highly divergent sympatric lineages of Leptotila verreauxi(Aves:Columbidae)suggest a secondary contact area in the Isthmus of Tehuantepec,Mexico

Highly divergent sympatric lineages of Leptotila verreauxi(Aves:Columbidae)suggest a secondary contact area in the Isthmus of Tehuantepec,Mexico

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Due to a complex geological and biotic history,the Isthmus of Tehuantepec(IT),has been long recognized as a driver for the evolutionary divergence of numerous lowland and highland taxa.Widely distributed in the low-lands of the American continent,the White-Tipped Dove(Leptotila verreauxi)is a polytypic species with 13 recognized subspecies.Four of these have been recorded in Mexico,and the distribution of three abuts at the IT,suggesting a contact zone.To estimate phylogenetic patterns,divergence times and genetic differentiation,we examined two mtDNA(ND2 and COI)and one nDNA(β-fibint 7)markers.We also used correlative ecological niche models(ENM)to assess whether ecological differences across the IT may have acted as a biogeographical boundary.We estimated paleodistributions during the Middle Holocene,Last Glacial Maximum and Last Inter-glacial,to evaluate the influence of climate changes on the distribution and demographic changes.Our results showed genetically distinct lineages that diverged approximately 2.5 million years ago.Climatic and ecological factors may have played a dual role in promoting differentiation,but also in the formation of a secondary contact zone in the southern IT.Our ecological niche comparisons indicated that the ecological niche of sympatric lineages at the IT are not identical,suggesting niches divergence;in addition,environmental niche models across the region indicated no abrupt biogeographic barriers,but the presence of regions with low suitability.These results suggest that genetic differentiation originated by a vicariant event probably related to environmental factors,favored the evolution of different ecological niches.Also,the absence of a biogeographic barrier but the presence of less suitable areas in the contact regions,suggest that secondary contact zones may be also main-tained by climatic factors for the eastern group,but also by biotic interactions for the western group.

Biogeographical boundaryHumid and dry forestsIsthmus of TehuantepecPhylogeographySecondary contact

Orlando J.Espinosa-Chávez、Adolfo G.Navarro-Sigüenza、Hernando Rodríguez-Correa、Luis A.Sánchez-González

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Museo de Zoología"Alfonso L.Herrera",Depto.de Biología Evolutiva,Facultad de Ciencias,Universidad Nacional Autónoma de México,Apdo.Postal 70-399,CP 04510,Ciudad de México,Mexico

Posgrado en Ciencias Biológicas,Unidad de Posgrado,Edificio D,1° Piso,Circuito de Posgrados,Ciudad Universitaria,Universidad Nacional Autónoma de México,Coyoacán,CP 04510,CDMX,Mexico

Escuela Nacional de Estudios Superiores Unidad Morelia,Universidad Nacional Autónoma de México.Antigua Carretera a Pátzcuaro No.8701 Col.Ex Hacienda de San José de la Huerta,C.P.58190,Morelia,Michoacán,Mexico

fulfillments of OJE-C master's degree project in the Posgrado en Ciencias Biológicas,UNAMCGEP Scholarship for UN AM postgraduate studiesPAPIIT-UN AM grantFran?ois Vuilleumier Fund for Neotropical Bird Research from the Neotropical Ornithological Society(NOS)

IN222817

2024

10.1016/j.avrs.2024.100160

鸟类学研究(英文版)
北京林业大学

鸟类学研究(英文版)

影响因子：0.553
ISSN：2055-6187
年,卷(期)：2024.15(1)
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