Evidence of plant and animal communities at exposed and subglacial (cave) geothermal sites in Antarctica

  • Ceridwen I. Fraser
  • Laurie Connell
  • Charles K. Lee
  • S. Craig Cary
Short Note

Abstract

Geothermal areas, such as volcanoes, might have acted as glacial microrefugia for a wide range of species. The heavily glaciated but volcanically active Antarctic continent presents an ideal system for assessing this hypothesis. Ice-free terrain around volcanoes in Antarctica is, however, often restricted to small patches, whereas subglacial cave systems, formed by vented volcanic steam, can be extensive and interconnected. No observations of macrobiota have yet been made for subglacial geothermal environments in Antarctica, but these organisms are often patchily distributed and can be difficult to find. We carried out metabarcoding (eDNA) analyses of soil samples taken from exposed areas on three volcanoes in Victoria Land, and subglacial caves on Mount Erebus. We found evidence of numerous eukaryotic groups, including mosses, algae, arthropods, oligochaetes and nematodes, at both exposed and subglacial sites. Our findings support the notion that geothermal areas—including subglacial environments—can nurture biodiversity in glaciated regions.

Keywords

Volcano Polar Environmental DNA eDNA Refugia Subglacial 

Supplementary material

300_2017_2198_MOESM1_ESM.pdf (548 kb)
Supplementary material 1 (PDF 547 kb)
300_2017_2198_MOESM2_ESM.xlsx (62 kb)
Supplementary material 2 (XLSX 61 kb)

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Fenner School of Environment and SocietyAustralian National UniversityActonAustralia
  2. 2.Department of Molecular and Biomedical SciencesUniversity of MaineOronoUSA
  3. 3.International Centre for Terrestrial Antarctic Research, University of WaikatoHamiltonNew Zealand

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