A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present
We present a diatom record from a sediment core taken in Lake Fryxell, Taylor Valley, Antarctica. Six zones were defined using diatom assemblage changes that indicate varying limnological conditions. The early lake stage, ca. 35,000 cal years BP, is characterized by Mayamea atomus f. permitis, a spe...
Published in: | Journal of Paleolimnology |
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ftlouisianastuir:oai:digitalcommons.lsu.edu:geo_pubs-1625 2023-06-11T04:07:11+02:00 A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present Konfirst, Matthew A. Sjunneskog, Charlotte Scherer, Reed P. Doran, Peter T. 2011-08-01T07:00:00Z https://digitalcommons.lsu.edu/geo_pubs/626 https://doi.org/10.1007/s10933-011-9537-6 unknown LSU Digital Commons https://digitalcommons.lsu.edu/geo_pubs/626 doi:10.1007/s10933-011-9537-6 Faculty Publications Antarctica Diatom Dry Valleys Glacial Lake Washburn Lake Fryxell Paleolimnology text 2011 ftlouisianastuir https://doi.org/10.1007/s10933-011-9537-6 2023-05-28T18:16:59Z We present a diatom record from a sediment core taken in Lake Fryxell, Taylor Valley, Antarctica. Six zones were defined using diatom assemblage changes that indicate varying limnological conditions. The early lake stage, ca. 35,000 cal years BP, is characterized by Mayamea atomus f. permitis, a species rarely reported in modern Antarctic Dry Valley environments. An extended period from ca. 35,000 to 19,000 cal years BP is characterized by low diatom abundance, with dominant taxa Luticola spp., Muelleria spp., and Diadesmis contenta. The modern assemblage was established ca. 13,000 cal years BP, after two relatively brief transitional stages. One key species for this recent period, Navicula lineola var. perlepida, is absent in surface sediments and the modern environment, indicating an environmental change within the last several centuries. The diatom assemblage is compared to modern diatom communities in Dry Valley streams, which provide the most complete information on diatom distributions in this region. Although precise environmental interpretation of the core is hampered by limited knowledge of environmental constraints on many of the diatom taxa present in the lake core, the data provide important new insights into the history of Glacial Lake Washburn. © 2011 Springer Science+Business Media B.V. Text Antarc* Antarctic Antarctica LSU Digital Commons (Louisiana State University) Antarctic Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Washburn ENVELOPE(-86.133,-86.133,-77.617,-77.617) Washburn Lake ENVELOPE(-107.500,-107.500,70.050,70.050) Journal of Paleolimnology 46 2 257 272 |
institution |
Open Polar |
collection |
LSU Digital Commons (Louisiana State University) |
op_collection_id |
ftlouisianastuir |
language |
unknown |
topic |
Antarctica Diatom Dry Valleys Glacial Lake Washburn Lake Fryxell Paleolimnology |
spellingShingle |
Antarctica Diatom Dry Valleys Glacial Lake Washburn Lake Fryxell Paleolimnology Konfirst, Matthew A. Sjunneskog, Charlotte Scherer, Reed P. Doran, Peter T. A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present |
topic_facet |
Antarctica Diatom Dry Valleys Glacial Lake Washburn Lake Fryxell Paleolimnology |
description |
We present a diatom record from a sediment core taken in Lake Fryxell, Taylor Valley, Antarctica. Six zones were defined using diatom assemblage changes that indicate varying limnological conditions. The early lake stage, ca. 35,000 cal years BP, is characterized by Mayamea atomus f. permitis, a species rarely reported in modern Antarctic Dry Valley environments. An extended period from ca. 35,000 to 19,000 cal years BP is characterized by low diatom abundance, with dominant taxa Luticola spp., Muelleria spp., and Diadesmis contenta. The modern assemblage was established ca. 13,000 cal years BP, after two relatively brief transitional stages. One key species for this recent period, Navicula lineola var. perlepida, is absent in surface sediments and the modern environment, indicating an environmental change within the last several centuries. The diatom assemblage is compared to modern diatom communities in Dry Valley streams, which provide the most complete information on diatom distributions in this region. Although precise environmental interpretation of the core is hampered by limited knowledge of environmental constraints on many of the diatom taxa present in the lake core, the data provide important new insights into the history of Glacial Lake Washburn. © 2011 Springer Science+Business Media B.V. |
format |
Text |
author |
Konfirst, Matthew A. Sjunneskog, Charlotte Scherer, Reed P. Doran, Peter T. |
author_facet |
Konfirst, Matthew A. Sjunneskog, Charlotte Scherer, Reed P. Doran, Peter T. |
author_sort |
Konfirst, Matthew A. |
title |
A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present |
title_short |
A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present |
title_full |
A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present |
title_fullStr |
A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present |
title_full_unstemmed |
A diatom record of environmental change in Fryxell Basin, Taylor Valley, Antarctica, late Pleistocene to present |
title_sort |
diatom record of environmental change in fryxell basin, taylor valley, antarctica, late pleistocene to present |
publisher |
LSU Digital Commons |
publishDate |
2011 |
url |
https://digitalcommons.lsu.edu/geo_pubs/626 https://doi.org/10.1007/s10933-011-9537-6 |
long_lat |
ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.000,163.000,-77.617,-77.617) ENVELOPE(-86.133,-86.133,-77.617,-77.617) ENVELOPE(-107.500,-107.500,70.050,70.050) |
geographic |
Antarctic Fryxell Glacial Lake Lake Fryxell Taylor Valley Washburn Washburn Lake |
geographic_facet |
Antarctic Fryxell Glacial Lake Lake Fryxell Taylor Valley Washburn Washburn Lake |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Faculty Publications |
op_relation |
https://digitalcommons.lsu.edu/geo_pubs/626 doi:10.1007/s10933-011-9537-6 |
op_doi |
https://doi.org/10.1007/s10933-011-9537-6 |
container_title |
Journal of Paleolimnology |
container_volume |
46 |
container_issue |
2 |
container_start_page |
257 |
op_container_end_page |
272 |
_version_ |
1768380038099501056 |