nerc.ac.uk

Extinction of austral diatoms in response to large-scale climate dynamics in Antarctica

Pinseel, Eveline; Van de Vijver, Bart; Wolfe, Alexander P.; Harper, Margaret; Antoniades, Dermot; Ashworth, Allan C.; Ector, Luc; Lewis, Adam R.; Perren, Bianca ORCID: https://orcid.org/0000-0001-6089-6468; Hodgson, Dominic A. ORCID: https://orcid.org/0000-0002-3841-3746; Sabbe, Koen; Verleyen, Elie; Vyverman, Wim. 2021 Extinction of austral diatoms in response to large-scale climate dynamics in Antarctica. Science Advances, 7 (38), eabh3233. 14, pp. https://doi.org/10.1126/sciadv.abh3233

Before downloading, please read NORA policies.
[img]
Preview
Text (Open Access)
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
sciadv.abh3233.pdf - Published Version
Available under License Creative Commons Attribution Non-commercial 4.0.

Download (5MB) | Preview

Abstract/Summary

Despite evidence for microbial endemism, an understanding of the impact of geological and paleoclimate events on the evolution of regional protist communities remains elusive. Here, we provide insights into the biogeographical history of Antarctic freshwater diatoms, using lacustrine fossils from mid-Miocene and Quaternary Antarctica, and dovetail this dataset with a global inventory of modern freshwater diatom communities. We reveal the existence of a diverse mid-Miocene diatom flora bearing similarities with several former Gondwanan landmasses. Miocene cooling and Plio-Pleistocene glaciations triggered multiple extinction waves, resulting in the selective depauperation of this flora. Although extinction dominated, in situ speciation and new colonizations ultimately shaped the species-poor, yet highly adapted and largely endemic, modern Antarctic diatom flora. Our results provide a more holistic view on the scale of biodiversity turnover in Neogene and Pleistocene Antarctica than the fragmentary perspective offered by macrofossils and underscore the sensitivity of lacustrine microbiota to large-scale climate perturbations.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1126/sciadv.abh3233
ISSN: 2375-2548
Date made live: 20 Sep 2021 09:07 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/529833

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...