Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum
Abstract Aim There is no previous direct evidence for the occurrence of lacustrine refuges for invertebrate fauna in Antarctica spanning the Last Glacial Maximum (LGM). In the absence of verified LGM lacustrine refuges many species are believed to result from Holocene dispersal from sub‐Antarctic is...
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crwiley:10.1111/j.1365-2699.2006.01490.x 2024-06-23T07:47:39+00:00 Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum Cromer, Louise Gibson, John A. E. Swadling, Kerrie M. Hodgson, Dominic A. 2006 http://dx.doi.org/10.1111/j.1365-2699.2006.01490.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2006.01490.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2006.01490.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 33, issue 7, page 1314-1323 ISSN 0305-0270 1365-2699 journal-article 2006 crwiley https://doi.org/10.1111/j.1365-2699.2006.01490.x 2024-05-31T08:16:02Z Abstract Aim There is no previous direct evidence for the occurrence of lacustrine refuges for invertebrate fauna in Antarctica spanning the Last Glacial Maximum (LGM). In the absence of verified LGM lacustrine refuges many species are believed to result from Holocene dispersal from sub‐Antarctic islands and continents further north. If freshwater lake environments were present throughout the LGM, extant freshwater species may have been associated with Antarctica prior to this glacial period. This study looked at faunal microfossils in a sediment core from an Antarctic freshwater lake. This lake is unusual in that, unlike most Antarctic lakes, the sediment record extends to c . 130,000 yr bp , i.e. prior to the LGM. Location Lake Reid, Larsemann Hills, East Antarctica (76°23′ E; 69°23′ S). Methods Palaeofaunal communities in Lake Reid were identified through examination of faunal microfossils in a sediment core that extended to c . 130,000 yr bp . Results Ephippia and mandibles from the cladoceran Daphniopsis studeri and loricae of the rotifer Notholca sp. were found at all depths in the sediment, indicating that these two species have been present in the lake for up to 130,000 years. Copepod mandibles were also present in the older section of the core, yet were absent from the most recent sediments, indicating extinction of this species from Lake Reid during the LGM. Main conclusion The presence of D. studeri and Notholca sp. microfossils throughout the entire Lake Reid core is the first direct evidence of a glacial lacustrine refugium for invertebrate animals in Antarctica, and indicates the presence of a relict fauna on the Antarctic continent. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Rotifer Wiley Online Library Antarctic East Antarctica Lake Reid ENVELOPE(76.379,76.379,-69.386,-69.386) Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) The Antarctic Journal of Biogeography 33 7 1314 1323 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Aim There is no previous direct evidence for the occurrence of lacustrine refuges for invertebrate fauna in Antarctica spanning the Last Glacial Maximum (LGM). In the absence of verified LGM lacustrine refuges many species are believed to result from Holocene dispersal from sub‐Antarctic islands and continents further north. If freshwater lake environments were present throughout the LGM, extant freshwater species may have been associated with Antarctica prior to this glacial period. This study looked at faunal microfossils in a sediment core from an Antarctic freshwater lake. This lake is unusual in that, unlike most Antarctic lakes, the sediment record extends to c . 130,000 yr bp , i.e. prior to the LGM. Location Lake Reid, Larsemann Hills, East Antarctica (76°23′ E; 69°23′ S). Methods Palaeofaunal communities in Lake Reid were identified through examination of faunal microfossils in a sediment core that extended to c . 130,000 yr bp . Results Ephippia and mandibles from the cladoceran Daphniopsis studeri and loricae of the rotifer Notholca sp. were found at all depths in the sediment, indicating that these two species have been present in the lake for up to 130,000 years. Copepod mandibles were also present in the older section of the core, yet were absent from the most recent sediments, indicating extinction of this species from Lake Reid during the LGM. Main conclusion The presence of D. studeri and Notholca sp. microfossils throughout the entire Lake Reid core is the first direct evidence of a glacial lacustrine refugium for invertebrate animals in Antarctica, and indicates the presence of a relict fauna on the Antarctic continent. |
format |
Article in Journal/Newspaper |
author |
Cromer, Louise Gibson, John A. E. Swadling, Kerrie M. Hodgson, Dominic A. |
spellingShingle |
Cromer, Louise Gibson, John A. E. Swadling, Kerrie M. Hodgson, Dominic A. Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum |
author_facet |
Cromer, Louise Gibson, John A. E. Swadling, Kerrie M. Hodgson, Dominic A. |
author_sort |
Cromer, Louise |
title |
Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum |
title_short |
Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum |
title_full |
Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum |
title_fullStr |
Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum |
title_full_unstemmed |
Evidence for a lacustrine faunal refuge in the Larsemann Hills, East Antarctica, during the Last Glacial Maximum |
title_sort |
evidence for a lacustrine faunal refuge in the larsemann hills, east antarctica, during the last glacial maximum |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1365-2699.2006.01490.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2006.01490.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2006.01490.x |
long_lat |
ENVELOPE(76.379,76.379,-69.386,-69.386) ENVELOPE(76.217,76.217,-69.400,-69.400) |
geographic |
Antarctic East Antarctica Lake Reid Larsemann Hills The Antarctic |
geographic_facet |
Antarctic East Antarctica Lake Reid Larsemann Hills The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Rotifer |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Rotifer |
op_source |
Journal of Biogeography volume 33, issue 7, page 1314-1323 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2699.2006.01490.x |
container_title |
Journal of Biogeography |
container_volume |
33 |
container_issue |
7 |
container_start_page |
1314 |
op_container_end_page |
1323 |
_version_ |
1802651797335048192 |