Genomic insights into the Montseny brook newt (Calotriton arnoldi), a Critically Endangered glacial relict

The Montseny brook newt (Calotriton arnoldi), considered the most endangered amphibian in Europe, is a relict salamandrid species endemic to a small massif located in northeastern Spain. Although conservation efforts should always be guided by genomic studies, those are yet scarce among urodeles, ha...

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Detalhes bibliográficos
Autores: Talavera, Adrián, Palmada Flores, Marc, Burriel Carranza, Bernat, Valbuena Ureña, Emilio, Mochales Riaño, Gabriel, Adams, Dean, Tejero Cicuéndez, Hector, Soler Membrives, Anna, Amat, Fèlix, Guinart, Daniel, Carbonell, Francesc, Obon, Elena, Marquès Bonet, Tomàs, Carranza, Salvador
Formato: artículo
Fecha de publicación:2024
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/120469
Acesso em linha:https://hdl.handle.net/20.500.14352/120469
Access Level:acceso abierto
Palavra-chave:597.6
575.113
591.5
Genomics
Zoology
Ecology
Zoología
Anfibios
Genética
Ecología (Biología)
2401 Biología Animal (Zoología)
2401.08 Genética Animal
2401.06 Ecología Animal
Descrição
Resumo:The Montseny brook newt (Calotriton arnoldi), considered the most endangered amphibian in Europe, is a relict salamandrid species endemic to a small massif located in northeastern Spain. Although conservation efforts should always be guided by genomic studies, those are yet scarce among urodeles, hampered by the extreme sizes of their genomes. Here, we present the third available genome assembly for the order Caudata, and the first genomic study of the species and its sister taxon, the Pyrenean brook newt (Calotriton asper), combining whole-genome and ddRADseq data. Our results reveal significant demographic oscillations which accurately mirrored Europe’s climatic history. Although severe bottlenecks have led to depauperate genomic diversity and long runs of homozygosity along a gigantic genome, inbreeding might have been avoided by assortative mating strategies. Other life history traits, however, seem to have been less advantageous, and the lack of land dispersal has driven to exceptional levels of population fragmentation.

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