Geographical vs. ecological diversification in <i>Carex</i> section <i>Phacocystis</i> (Cyperaceae): Patterns hidden behind a twisted taxonomy

  • Carmen Benítez‐Benítez
    Botany Area, Department of Molecular Biology and Biochemical Engineering Universidad Pablo de Olavide Ctra de Utrera km 1 sn Seville 41013 Spain
  • Santiago Martín‐Bravo
    Botany Area, Department of Molecular Biology and Biochemical Engineering Universidad Pablo de Olavide Ctra de Utrera km 1 sn Seville 41013 Spain
  • Charlotte S. Bjorå
    Natural History Museum University of Oslo P.O. Box 1172 Blindern Oslo 0318 Norway
  • Sebastian Gebauer
    Martin Luther University Halle‐Wittenberg Geobotany and Botanical Garden Am Kirchtor 3 Halle 06108 Germany
  • Andrew L. Hipp
    The Morton Arboretum 4100 Illinois Route 53 Lisle IL 60532 USA
  • Matthias H. Hoffmann
    Martin Luther University Halle‐Wittenberg Geobotany and Botanical Garden Am Kirchtor 3 Halle 06108 Germany
  • Modesto Luceño
    Botany Area, Department of Molecular Biology and Biochemical Engineering Universidad Pablo de Olavide Ctra de Utrera km 1 sn Seville 41013 Spain
  • Tyril M. Pedersen
    Natural History Museum University of Oslo P.O. Box 1172 Blindern Oslo 0318 Norway
  • Anton Reznicek
    University of Michigan Herbarium 3600 Varsity Dr Ann Arbor MI 48108‐2228 USA
  • Eric Roalson
    School of Biological Sciences Washington State University Pullman WA 99164 USA
  • Polina Volkova
    Moscow South‐West High School Moscow Russian Federation
  • Okihito Yano
    Faculty of Biosphere‐Geosphere Science Okayama University of Science Okayama 700‐0005 Japan
  • Daniel Spalink
    Department of Ecology and Conservation Biology Texas A&M University 534 John Kimbrough Blvd College Station TX 77943 USA
  • Pedro Jiménez‐Mejías
    Department of Biology Universidad Autónoma de Madrid Campus Cantoblanco Madrid 28049 Spain

抄録

<jats:title>Abstract</jats:title><jats:p> <jats:italic>Carex</jats:italic> section <jats:italic>Phacocystis</jats:italic> (Cyperaceae) is one of the most diverse and taxonomically complex groups of sedges (between 116 and 147 species), with a worldwide distribution in a wide array of biomes. It has a very complicated taxonomic history, with numerous disagreements among different treatments. We studied the biogeography and niche evolution in a phylogenetic framework to unveil the relative contribution of geographical and ecological drivers to diversification of the group. We used a large species sampling of the section (82% of extant species) to build a phylogeny based on four DNA regions, constrained with a phylogenomic HybSeq tree and dated with six fossil calibrations. Our phylogenetic results recovered section <jats:italic>Phacocystis</jats:italic> s.s. (core Phacocystis) as sister to section <jats:italic>Praelongae</jats:italic>. Ancestral area reconstruction points toward the N Pacific as the cradle for the crown diversification of section <jats:italic>Phacocystis</jats:italic> during the Middle Miocene. Wide distributions were recurrently inferred across deep nodes. Large Northern Hemisphere lineages with geographical congruence were retrieved, pointing toward the importance of allopatric divergence at deep phylogenetic levels, whereas within‐area speciation emerges as the predominant pattern at shallow phylogenetic level. The Southern Hemisphere (Neotropics, SW Pacific) was colonized several times from the Northern Hemisphere. The global expansion of <jats:italic>Carex</jats:italic> section <jats:italic>Phacocystis</jats:italic> did not entail major ecological changes along the inner branches of the phylogeny. Nevertheless, ecological differentiation seems to gain importance toward recent times.</jats:p>

収録刊行物

被引用文献 (1)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ