Location Location Location: Survival of Antarctic biota requires the best real-estate ...
The origin of terrestrial biota in Antarctica has been debated since the discovery of springtails on the first historic voyages to the southern continent more than 120 years ago. A plausible explanation for the long-term persistence of life requiring ice-free land on continental Antarctica has, howe...
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ftdatacite:10.5061/dryad.zw3r228bx 2024-06-09T07:40:54+00:00 Location Location Location: Survival of Antarctic biota requires the best real-estate ... Stevens, Mark Mackintosh, Andrew 2022 https://dx.doi.org/10.5061/dryad.zw3r228bx https://datadryad.org/stash/dataset/doi:10.5061/dryad.zw3r228bx en eng Dryad https://dx.doi.org/10.1098/rsbl.2022.0590 https://dx.doi.org/10.5281/zenodo.7425718 Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 springtails ice-free glacial refuge cosmogenic dating Nunatak ice sheet FOS Earth and related environmental sciences Dataset dataset 2022 ftdatacite https://doi.org/10.5061/dryad.zw3r228bx10.1098/rsbl.2022.059010.5281/zenodo.7425718 2024-05-13T11:15:17Z The origin of terrestrial biota in Antarctica has been debated since the discovery of springtails on the first historic voyages to the southern continent more than 120 years ago. A plausible explanation for the long-term persistence of life requiring ice-free land on continental Antarctica has, however, remained elusive. The default glacial eradication scenario has dominated because hypotheses to date have failed to provide a mechanism for their widespread survival on the continent, particularly through the Last Glacial Maximum when geological evidence demonstrates that the ice sheet was more extensive than present. Here, we provide support for the alternative nunatak refuge hypothesis – that ice-free terrain with sufficient relief above the ice sheet provided refuges and was a source for terrestrial biota found today. This hypothesis is supported here by an increased understanding from the combination of biological and geological evidence, and we outline a mechanism for these refuges during successive ... : Data collection. We focussed on ice-free terrain represented by 15 currently recognized Antarctic Conservation Biodiversity Regions (ACBRs); we do not include South Orkney Islands. We compiled all published occurrence records for all springtail species considered to be endemic or native from these 15 ACBRs and from our own unpublished records. We obtained the ten geothermal sites used in the analyses by Fraser et al. from their Table S6. We compiled the geochronological data from all known cosmogenic-nuclide data from Antarctica (https://www.ice-d.org/) and from publications that were used to scrutinise the datasets. Cosmogenic dating is uniquely suited to Antarctic environments, however, there are problematic samples and locations. We include a selection of cosmogenic datasets to represent sites that clearly (or potentially) delineate Last Glacial Maximum surface elevations, and reject datasets where results are inconclusive due to isotope inheritance or incomplete or inconclusive results. From the included ... Dataset Antarc* Antarctic Antarctica Ice Sheet South Orkney Islands Springtail DataCite Metadata Store (German National Library of Science and Technology) Antarctic South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
springtails ice-free glacial refuge cosmogenic dating Nunatak ice sheet FOS Earth and related environmental sciences |
spellingShingle |
springtails ice-free glacial refuge cosmogenic dating Nunatak ice sheet FOS Earth and related environmental sciences Stevens, Mark Mackintosh, Andrew Location Location Location: Survival of Antarctic biota requires the best real-estate ... |
topic_facet |
springtails ice-free glacial refuge cosmogenic dating Nunatak ice sheet FOS Earth and related environmental sciences |
description |
The origin of terrestrial biota in Antarctica has been debated since the discovery of springtails on the first historic voyages to the southern continent more than 120 years ago. A plausible explanation for the long-term persistence of life requiring ice-free land on continental Antarctica has, however, remained elusive. The default glacial eradication scenario has dominated because hypotheses to date have failed to provide a mechanism for their widespread survival on the continent, particularly through the Last Glacial Maximum when geological evidence demonstrates that the ice sheet was more extensive than present. Here, we provide support for the alternative nunatak refuge hypothesis – that ice-free terrain with sufficient relief above the ice sheet provided refuges and was a source for terrestrial biota found today. This hypothesis is supported here by an increased understanding from the combination of biological and geological evidence, and we outline a mechanism for these refuges during successive ... : Data collection. We focussed on ice-free terrain represented by 15 currently recognized Antarctic Conservation Biodiversity Regions (ACBRs); we do not include South Orkney Islands. We compiled all published occurrence records for all springtail species considered to be endemic or native from these 15 ACBRs and from our own unpublished records. We obtained the ten geothermal sites used in the analyses by Fraser et al. from their Table S6. We compiled the geochronological data from all known cosmogenic-nuclide data from Antarctica (https://www.ice-d.org/) and from publications that were used to scrutinise the datasets. Cosmogenic dating is uniquely suited to Antarctic environments, however, there are problematic samples and locations. We include a selection of cosmogenic datasets to represent sites that clearly (or potentially) delineate Last Glacial Maximum surface elevations, and reject datasets where results are inconclusive due to isotope inheritance or incomplete or inconclusive results. From the included ... |
format |
Dataset |
author |
Stevens, Mark Mackintosh, Andrew |
author_facet |
Stevens, Mark Mackintosh, Andrew |
author_sort |
Stevens, Mark |
title |
Location Location Location: Survival of Antarctic biota requires the best real-estate ... |
title_short |
Location Location Location: Survival of Antarctic biota requires the best real-estate ... |
title_full |
Location Location Location: Survival of Antarctic biota requires the best real-estate ... |
title_fullStr |
Location Location Location: Survival of Antarctic biota requires the best real-estate ... |
title_full_unstemmed |
Location Location Location: Survival of Antarctic biota requires the best real-estate ... |
title_sort |
location location location: survival of antarctic biota requires the best real-estate ... |
publisher |
Dryad |
publishDate |
2022 |
url |
https://dx.doi.org/10.5061/dryad.zw3r228bx https://datadryad.org/stash/dataset/doi:10.5061/dryad.zw3r228bx |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic South Orkney Islands |
geographic_facet |
Antarctic South Orkney Islands |
genre |
Antarc* Antarctic Antarctica Ice Sheet South Orkney Islands Springtail |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet South Orkney Islands Springtail |
op_relation |
https://dx.doi.org/10.1098/rsbl.2022.0590 https://dx.doi.org/10.5281/zenodo.7425718 |
op_rights |
Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 |
op_doi |
https://doi.org/10.5061/dryad.zw3r228bx10.1098/rsbl.2022.059010.5281/zenodo.7425718 |
_version_ |
1801369297702879232 |