Long-term insitu persistence of biodiversity in tropical sky islands revealed by landscape genomics

Autor(es)

Mastretta-Yanes, Alicia ^[1] ; Xue, Alexander T. ^{[2, 3, 4]} ; Moreno-Letelier, Alejandra ^[5] ; Jorgensen, Tove H. ^[6] ; Alvarez, Nadir ^{[7, 8]} ; Pinero, Daniel ^[9] ; Emerson, Brent C. ^{[10, 11]}

Afiliação do(s) autor(es):Mostrar menos -

^[1] Comis Nacl Conocimiento & Uso Biodiversidad, CONACYT CONABIO, Mexico City, DF - Mexico

^[2] CUNY, Grad Ctr, New York, NY - USA

^[3] CUNY City Coll, Dept Biol, 138Th St & Convent Ave, New York, NY 10031 - USA

^[4] Rutgers State Univ, Dept Genet, Piscataway, NJ - USA

^[5] Univ Nacl Autonoma Mexico, Jardin Bot, Inst Biol, Mexico City, DF - Mexico

^[6] Aarhus Univ, Dept Biosci, Aarhus - Denmark

^[7] Univ Lausanne, Dept Ecol & Evolut, Lausanne - Switzerland

^[8] Museum Hist Nat, Geneva - Switzerland

^[9] Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City, DF - Mexico

^[10] CSIC, IPNA, Isl Ecol & Evolut Res Grp, San Cristobal la Laguna, Santa Cruz De T - Spain

^[11] Univ East Anglia, Sch Biol Sci, Norwich, Norfolk - England

• Tipo de documento: Artigo Científico
• Fonte: Molecular Ecology; v. 27, n. 2, p. 432-448, JAN 2018.
• Citações Web of Science: 2

Resumo

Tropical mountains are areas of high species richness and endemism. Two historical phenomena may have contributed to this: (i) fragmentation and isolation of habitats may have promoted the genetic differentiation of populations and increased the possibility of allopatric divergence and speciation and (ii) the mountain areas may have allowed long-term population persistence during global climate fluctuations. These two phenomena have been studied using either species occurrence data or estimating species divergence times. However, only few studies have used intraspecific genetic data to analyse the mechanisms by which endemism may emerge at the microevolutionary scale. Here, we use landscape analysis of genomic SNP data sampled from two high-elevation plant species from an archipelago of tropical sky islands (the Trans-Mexican Volcanic Belt) to test for population genetic differentiation, synchronous demographic changes and habitat persistence. We show that genetic differentiation can be explained by the degree of glacial habitat connectivity among mountains and that mountains have facilitated the persistence of populations throughout glacial/interglacial cycles. Our results support the ongoing role of tropical mountains as cradles for biodiversity by uncovering cryptic differentiation and limits to gene flow. (AU)

• Processo FAPESP: 13/50297-0 - Dimensions US-BIOTA São Paulo: integrando disciplinas para a predição da biodiversidade da Floresta Atlântica no Brasil
• Beneficiário: Cristina Yumi Miyaki
• Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático