A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica
A comprehensive diatom stratigraphy is used to calculate a palaeosalinity history for an Antarctic lake via an established diatom-salinity transfer function for the Vestfold Hills, Antarctica. A sediment core taken from Ace Lake in 1995 shows three distinct changes in diatom assemblage constituents:...
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Online Access: | https://doi.org/10.1191/095968399671725699 http://ecite.utas.edu.au/16606 |
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ftunivtasecite:oai:ecite.utas.edu.au:16606 2023-05-15T13:59:07+02:00 A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica Roberts, D McMinn, A 1999 https://doi.org/10.1191/095968399671725699 http://ecite.utas.edu.au/16606 en eng Arnold http://dx.doi.org/10.1191/095968399671725699 Roberts, D and McMinn, A, A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica, The Holocene, 9, (4) pp. 401-408. ISSN 0959-6836 (1999) [Refereed Article] http://ecite.utas.edu.au/16606 Biological Sciences Ecology Palaeoecology Refereed Article PeerReviewed 1999 ftunivtasecite https://doi.org/10.1191/095968399671725699 2019-12-13T21:00:00Z A comprehensive diatom stratigraphy is used to calculate a palaeosalinity history for an Antarctic lake via an established diatom-salinity transfer function for the Vestfold Hills, Antarctica. A sediment core taken from Ace Lake in 1995 shows three distinct changes in diatom assemblage constituents: initial benthic hyposaline - freshwater taxa are replaced by marine planktonic and sea-ice taxa with these taxa in turn replaced by the benthic hypersaline taxa dominant in the lake today. These changes in assemblage composition enable the lakewater salinity of each stage to be determined, and the Holocene evolution of the lake to be refined. Deglaciation of the Vestfold Hills at the beginning of the Holocene exposed Ace Lake basin; following this, fresh lacustrine diatoms were deposited from ~11 380 to ~8110 corrected 14C yr BP. Relative sea-level rise after this time led to the progressive marine inundation of the lake and the deposition of marine diatom taxa. Marine taxa were dominant in the sediment for more than 6000 years. Isostatic rebound and stabilization of the sea-level isolated Ace Lake and at ~1480 corrected 14C yr BP saline lacustrine diatoms became the dominant taxa, indicative of the concentration of dissolved salts through evaporation after isolation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice eCite UTAS (University of Tasmania) Antarctic Vestfold Hills Vestfold Ace Lake ENVELOPE(78.188,78.188,-68.472,-68.472) The Holocene 9 4 401 408 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Palaeoecology |
spellingShingle |
Biological Sciences Ecology Palaeoecology Roberts, D McMinn, A A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica |
topic_facet |
Biological Sciences Ecology Palaeoecology |
description |
A comprehensive diatom stratigraphy is used to calculate a palaeosalinity history for an Antarctic lake via an established diatom-salinity transfer function for the Vestfold Hills, Antarctica. A sediment core taken from Ace Lake in 1995 shows three distinct changes in diatom assemblage constituents: initial benthic hyposaline - freshwater taxa are replaced by marine planktonic and sea-ice taxa with these taxa in turn replaced by the benthic hypersaline taxa dominant in the lake today. These changes in assemblage composition enable the lakewater salinity of each stage to be determined, and the Holocene evolution of the lake to be refined. Deglaciation of the Vestfold Hills at the beginning of the Holocene exposed Ace Lake basin; following this, fresh lacustrine diatoms were deposited from ~11 380 to ~8110 corrected 14C yr BP. Relative sea-level rise after this time led to the progressive marine inundation of the lake and the deposition of marine diatom taxa. Marine taxa were dominant in the sediment for more than 6000 years. Isostatic rebound and stabilization of the sea-level isolated Ace Lake and at ~1480 corrected 14C yr BP saline lacustrine diatoms became the dominant taxa, indicative of the concentration of dissolved salts through evaporation after isolation. |
format |
Article in Journal/Newspaper |
author |
Roberts, D McMinn, A |
author_facet |
Roberts, D McMinn, A |
author_sort |
Roberts, D |
title |
A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica |
title_short |
A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica |
title_full |
A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica |
title_fullStr |
A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica |
title_full_unstemmed |
A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica |
title_sort |
diatom-based palaeosalinity history of ace lake, vestfold hills, antarctica |
publisher |
Arnold |
publishDate |
1999 |
url |
https://doi.org/10.1191/095968399671725699 http://ecite.utas.edu.au/16606 |
long_lat |
ENVELOPE(78.188,78.188,-68.472,-68.472) |
geographic |
Antarctic Vestfold Hills Vestfold Ace Lake |
geographic_facet |
Antarctic Vestfold Hills Vestfold Ace Lake |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
http://dx.doi.org/10.1191/095968399671725699 Roberts, D and McMinn, A, A diatom-based palaeosalinity history of Ace Lake, Vestfold Hills, Antarctica, The Holocene, 9, (4) pp. 401-408. ISSN 0959-6836 (1999) [Refereed Article] http://ecite.utas.edu.au/16606 |
op_doi |
https://doi.org/10.1191/095968399671725699 |
container_title |
The Holocene |
container_volume |
9 |
container_issue |
4 |
container_start_page |
401 |
op_container_end_page |
408 |
_version_ |
1766267497178202112 |