RT Journal Article
T1 Vicariance versus dispersal across Beringian land bridges to explain circumpolar distribution: A case study in plants with high dispersal potential
A1 Maguilla Salado, Enrique
A1 Escudero, Marcial
A1 Luceño Garcés, Modesto
K1 Beringia
K1 Biogeography
K1 Bipolar
K1 Carex
K1 Climate change
K1 Cyperaceae
K1 Glaciations
K1 Long-distance dispersal
AB This article aims to disentangle the importance of the Beringian land bridges during the Pliocene and Quaternary periods in order to explain the current distribution of circumpolar plants with potential for long-distance dispersal. We sampled all extant species in Carex section Glareosae (26 species and 2 subspecies) and analysed 14 DNA regions, including the nrDNA regions ETS and ITS, three nuclear single-copy genes (CATP, G3PDH and GZF), and nine cpDNA regions: 50trnK intron, atpIH, matK, ndhJ-trnF, psbA-trnH, rpl32-trnL, rps16, trnC-ycf6 and ycf6-psbM. After testing for outlier proportions, we used Bayesian inference, maximum likelihood and a species-tree approach to infer phylogenetic relationships between species; divergence times were estimated using BEAST2. We then performed biogeographical analyses using “BioGeoBEARS” to estimate ancestral areas by means of reticulate models. Finally, lineage through time (LTT) and diversification pattern analyses were performed using BAMM. Our results show that Carex section Glareosae is a monophyletic group that diverged c. 6.56 Ma (4.54–8.51 Ma at 95% highest posterior density interval). We show that within-area cladogenetic speciation events and anagenetic dispersal (including some vicariance events) play an important role in shaping distribution in species with potential for long-distance dispersal. Diversification patterns show constant diversification rates over time. The Bering Strait may have played an important role in shaping the current distribution of the species in the section, facilitating dispersal between Asia and North America during glacial periods when the Beringian land bridges were open. Nevertheless, we cannot discount long-distance dispersal as an alternative major force shaping the species distribution in the section.
PB Wiley
YR 2018
FD 2018-01-14
LK https://hdl.handle.net/10433/19902
UL https://hdl.handle.net/10433/19902
LA en
NO Journal of Biogeography, vol 45, p. 771-783
NO This manuscript was founded by the Spanish Government, Grant/Award Number: CGL2012-38744, CGL2016-77401-P, AP2012-2189; Junta de Andaluc ıa, Grant/Award Number: RNM2736; EuropeanCommunity Research Infrastructures Program, Grant/Award Number: GB-TAF-2523
NO Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide
NO Departamento de Biología Vegetal y Ecología, Universidad de Sevilla
DS RIO
RD May 9, 2026