Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition
Abstract The McMurdo Dry Valleys of Antarctica harbor numerous permanently ice-covered lakes, which provide a year-round oasis for microbial life. Microbial eukaryotes in these lakes occupy a variety of trophic levels within the simple aquatic food web ranging from primary producers to tertiary pred...
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2011
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croxfordunivpr:10.1038/ismej.2011.23 2024-09-15T17:48:21+00:00 Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition Bielewicz, Scott Bell, Elanor Kong, Weidong Friedberg, Iddo Priscu, John C Morgan-Kiss, Rachael M 2011 http://dx.doi.org/10.1038/ismej.2011.23 http://www.nature.com/articles/ismej201123.pdf http://www.nature.com/articles/ismej201123 https://academic.oup.com/ismej/article-pdf/5/9/1559/56547685/41396_2011_article_bfismej201123.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights The ISME Journal volume 5, issue 9, page 1559-1564 ISSN 1751-7362 1751-7370 journal-article 2011 croxfordunivpr https://doi.org/10.1038/ismej.2011.23 2024-08-19T04:23:37Z Abstract The McMurdo Dry Valleys of Antarctica harbor numerous permanently ice-covered lakes, which provide a year-round oasis for microbial life. Microbial eukaryotes in these lakes occupy a variety of trophic levels within the simple aquatic food web ranging from primary producers to tertiary predators. Here, we report the first molecular study to describe the vertical distribution of the eukaryotic community residing in the photic zone of the east lobe (ELB) and west lobe (WLB) of the chemically stratified Lake Bonney. The 18S ribosomal RNA (rRNA) libraries revealed vertically stratified populations dominated by photosynthetic protists, with a cryptophyte dominating shallow populations (ELB–6 m; WLB–10 m), a haptophyte occupying mid-depths (both lobes 13 m) and chlorophytes residing in the deepest layers (ELB–18 and 20 m; WLB–15 and 20 m) of the photic zone. A previously undetected stramenopile occurred throughout the water column of both lobes. Temporal variation in the eukaryotic populations was examined during the transition from Antarctic summer (24-h sunlight) to polar night (complete dark). Protist diversity was similar between the two lobes of Lake Bonney due to exchange between the photic zones of the two basins via a narrow bedrock sill. However, vertical and temporal variation in protist distribution occurred, indicating the influence of the unique water chemistry on the biology of the two dry valley watersheds. Article in Journal/Newspaper Antarc* Antarctic Antarctica McMurdo Dry Valleys polar night Oxford University Press The ISME Journal 5 9 1559 1564 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract The McMurdo Dry Valleys of Antarctica harbor numerous permanently ice-covered lakes, which provide a year-round oasis for microbial life. Microbial eukaryotes in these lakes occupy a variety of trophic levels within the simple aquatic food web ranging from primary producers to tertiary predators. Here, we report the first molecular study to describe the vertical distribution of the eukaryotic community residing in the photic zone of the east lobe (ELB) and west lobe (WLB) of the chemically stratified Lake Bonney. The 18S ribosomal RNA (rRNA) libraries revealed vertically stratified populations dominated by photosynthetic protists, with a cryptophyte dominating shallow populations (ELB–6 m; WLB–10 m), a haptophyte occupying mid-depths (both lobes 13 m) and chlorophytes residing in the deepest layers (ELB–18 and 20 m; WLB–15 and 20 m) of the photic zone. A previously undetected stramenopile occurred throughout the water column of both lobes. Temporal variation in the eukaryotic populations was examined during the transition from Antarctic summer (24-h sunlight) to polar night (complete dark). Protist diversity was similar between the two lobes of Lake Bonney due to exchange between the photic zones of the two basins via a narrow bedrock sill. However, vertical and temporal variation in protist distribution occurred, indicating the influence of the unique water chemistry on the biology of the two dry valley watersheds. |
format |
Article in Journal/Newspaper |
author |
Bielewicz, Scott Bell, Elanor Kong, Weidong Friedberg, Iddo Priscu, John C Morgan-Kiss, Rachael M |
spellingShingle |
Bielewicz, Scott Bell, Elanor Kong, Weidong Friedberg, Iddo Priscu, John C Morgan-Kiss, Rachael M Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition |
author_facet |
Bielewicz, Scott Bell, Elanor Kong, Weidong Friedberg, Iddo Priscu, John C Morgan-Kiss, Rachael M |
author_sort |
Bielewicz, Scott |
title |
Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition |
title_short |
Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition |
title_full |
Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition |
title_fullStr |
Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition |
title_full_unstemmed |
Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition |
title_sort |
protist diversity in a permanently ice-covered antarctic lake during the polar night transition |
publisher |
Oxford University Press (OUP) |
publishDate |
2011 |
url |
http://dx.doi.org/10.1038/ismej.2011.23 http://www.nature.com/articles/ismej201123.pdf http://www.nature.com/articles/ismej201123 https://academic.oup.com/ismej/article-pdf/5/9/1559/56547685/41396_2011_article_bfismej201123.pdf |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys polar night |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys polar night |
op_source |
The ISME Journal volume 5, issue 9, page 1559-1564 ISSN 1751-7362 1751-7370 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights |
op_doi |
https://doi.org/10.1038/ismej.2011.23 |
container_title |
The ISME Journal |
container_volume |
5 |
container_issue |
9 |
container_start_page |
1559 |
op_container_end_page |
1564 |
_version_ |
1810289491855802368 |