RT Journal Article
T1 Long-distance dispersal explains the bipolar disjunction in Carex macloviana
A1 Márquez Corro, José Ignacio
A1 Escudero, Marcial
A1 Martín Bravo, Santiago
A1 Villaverde, Tamara
A1 Luceño Garcés, Modesto
K1 Bipolar distribution
K1 Carex macloviana
K1 Divergence time estimation
K1 Long-distance dispersal
K1 Ovales
K1 Phylogeography
K1 Vignea
AB PREMISE OF THE STUDY:The sedge Carex macloviana d'Urv presents a bipolar distribution. To clarify the origin of its distribution, we consider the four main hypotheses: long-distance dispersal (either by mountain hopping or by direct dispersal), vicariance, parallel evolution, and human introduction.METHODS:Phylogenetic, phylogeographic, and divergence time estimation analyses were carried out based on two nuclear ribosomal (ETS and ITS) regions, one nuclear single copy gene (CATP), and three plastid DNA regions (rps16 and 5′trnK introns, and psbA-trnH spacer), using Bayesian inference, maximum likelihood, and statistical parsimony. Bioclimatic data were used to characterize the climatic niche of C. macloviana.KEY RESULTS:Carex macloviana constitutes a paraphyletic species, dating back to the Pleistocene (0.62 Mya, 95% highest posterior density: 0.29–1.00 Mya). This species displays strong genetic structure between hemispheres, with two different lineages in the Southern Hemisphere and limited genetic differentiation in Northern Hemisphere populations. Also, populations from the Southern Hemisphere show a narrower climatic niche with regards to the Northern Hemisphere populations.CONCLUSIONS:Carex macloviana reached its bipolar distribution by long-distance dispersal, although it was not possible to determine whether it was caused by mountain hopping or by direct dispersal. While there is some support that Carex macloviana might have colonized the Northern Hemisphere by south-to-north transhemisphere dispersal during the Pleistocene, unlike the southwards dispersal pattern inferred for other bipolar Carex L. species, we cannot entirely rule out north-to-south dispersion.
PB Botanical Society of America
YR 2017
FD 2017
LK https://hdl.handle.net/10433/26317
UL https://hdl.handle.net/10433/26317
LA en
NO American Journal of Botany, vol 104, nº 5, p. 663-673
NO Universidad Pablo de Olavide. Departamento de Biología Molecular e Ingeniería Bioquímica
DS RIO
RD May 22, 2026