Following the Antarctic Circumpolar Current: Patterns and processes in the biogeography of the limpet Nacella (Mollusca: Patellogastropoda) across the Southern Ocean

Claudio A. González-Wevar, Mathias Hüne, Nicolas I. Segovia, Tomoyuki Nakano, Hamish G. Spencer, Steven L Chown, Thomas Saucède, Glenn Johnstone, Andrés Mansilla, Elie Poulin

Research output: Contribution to journalArticleResearchpeer-review

15 Citations (Scopus)

Abstract

Aim: We use an integrative biogeographical approach to further understand the evolution of an important Southern Ocean marine benthic element, the limpet genus Nacella (Mollusca: Patellogastropoda). 

Location: Southern Ocean. 

Methods: We used multi-locus time-calibrated phylogeny of Nacella at the scale of the whole Southern Ocean to elucidate the underlying processes involved in the origin and diversification of the genus. 

Results: Divergence-time estimates suggest that soon after its origin during the mid-Miocene (c. 12.5 Ma), Nacella separated into two main lineages currently distributed in (1) South America and (2) Antarctica and the sub-Antarctic islands. We identified two pulses of diversification, during the late Miocene (8 to 5.5 Ma) and the Pleistocene (< 1 Ma). 

Main conclusions: Major periods of climatic and oceanographical change strongly affected the biogeography of Nacella and demonstrate both the long- and short-term influence of the Antarctic Circumpolar Current across the Southern Ocean. Our analyses support the validity of all currently recognized Nacella species and reveal a new South-American lineage. This work constitutes the most detailed molecular-based study of an ecologically important, near-shore invertebrate Southern Ocean group and in so doing contributes to the improved understanding of the underlying patterns and processes in the origin and diversification of marine benthic fauna across this globally important region.

Original languageEnglish
Pages (from-to)861-874
Number of pages14
JournalJournal of Biogeography
Volume44
Issue number4
DOIs
Publication statusPublished - 1 Apr 2017

Keywords

  • Nacella
  • Antarctic Circumpolar Current
  • Biogeography
  • Lineage-through-time plots
  • Long-distance dispersal
  • Southern Ocean

Cite this