Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica.
Two ∼4 m vertical sequences of basal ice were collected from tunnels dug into the northern lateral margin of Taylor Glacier, McMurdo Dry Valleys, Antarctica. In both cases the basal sequences exhibit two contrasting ice facies groups; clean (debris-free) and banded dispersed (debris-rich). Debris-ri...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/149227 2023-05-15T13:44:43+02:00 Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica. Montross, Scott N Skidmore, Mark L. Christner, Brent C. Samyn, Denis Tison, Jean-Louis Lorrain, Reginald Doyle, Shawn M. Fitzsimons, Sean 2013 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/149227 en eng uri/info:doi/10.1080/01490451.2013.811316 uri/info:scp/84887037412 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/149227 Geomicrobiology journal Sciences exactes et naturelles biogeochemical cycling sediments subsurface microbiology info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2013 ftunivbruxelles 2022-06-12T21:11:00Z Two ∼4 m vertical sequences of basal ice were collected from tunnels dug into the northern lateral margin of Taylor Glacier, McMurdo Dry Valleys, Antarctica. In both cases the basal sequences exhibit two contrasting ice facies groups; clean (debris-free) and banded dispersed (debris-rich). Debris-rich ices exhibit elevated CO2 and depleted O2 concentrations compared to the clean facies. Bacterial cell numbers, respiration rates, and nutrient concentrations are highest in debris-rich layers. Together, our geochemical and biological data indicate that microbial heterotrophic respiration is likely occurring in situ within the basal ice matrix at ambient temperatures near -15°C. This implies that the basal ice zone of polar glaciers and larger ice sheets is a viable subglacial microbial habitat and active biome of significant volume that has not previously been considered. © 2014 Copyright Taylor and Francis Group, LLC. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica McMurdo Dry Valleys Taylor Glacier DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) McMurdo Dry Valleys Taylor Glacier ENVELOPE(162.167,162.167,-77.733,-77.733) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences exactes et naturelles biogeochemical cycling sediments subsurface microbiology |
spellingShingle |
Sciences exactes et naturelles biogeochemical cycling sediments subsurface microbiology Montross, Scott N Skidmore, Mark L. Christner, Brent C. Samyn, Denis Tison, Jean-Louis Lorrain, Reginald Doyle, Shawn M. Fitzsimons, Sean Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica. |
topic_facet |
Sciences exactes et naturelles biogeochemical cycling sediments subsurface microbiology |
description |
Two ∼4 m vertical sequences of basal ice were collected from tunnels dug into the northern lateral margin of Taylor Glacier, McMurdo Dry Valleys, Antarctica. In both cases the basal sequences exhibit two contrasting ice facies groups; clean (debris-free) and banded dispersed (debris-rich). Debris-rich ices exhibit elevated CO2 and depleted O2 concentrations compared to the clean facies. Bacterial cell numbers, respiration rates, and nutrient concentrations are highest in debris-rich layers. Together, our geochemical and biological data indicate that microbial heterotrophic respiration is likely occurring in situ within the basal ice matrix at ambient temperatures near -15°C. This implies that the basal ice zone of polar glaciers and larger ice sheets is a viable subglacial microbial habitat and active biome of significant volume that has not previously been considered. © 2014 Copyright Taylor and Francis Group, LLC. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Montross, Scott N Skidmore, Mark L. Christner, Brent C. Samyn, Denis Tison, Jean-Louis Lorrain, Reginald Doyle, Shawn M. Fitzsimons, Sean |
author_facet |
Montross, Scott N Skidmore, Mark L. Christner, Brent C. Samyn, Denis Tison, Jean-Louis Lorrain, Reginald Doyle, Shawn M. Fitzsimons, Sean |
author_sort |
Montross, Scott N |
title |
Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica. |
title_short |
Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica. |
title_full |
Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica. |
title_fullStr |
Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica. |
title_full_unstemmed |
Debris-rich basal ice as a microbial habitat, Taylor Glacier, Antarctica. |
title_sort |
debris-rich basal ice as a microbial habitat, taylor glacier, antarctica. |
publishDate |
2013 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/149227 |
long_lat |
ENVELOPE(162.167,162.167,-77.733,-77.733) |
geographic |
McMurdo Dry Valleys Taylor Glacier |
geographic_facet |
McMurdo Dry Valleys Taylor Glacier |
genre |
Antarc* Antarctica McMurdo Dry Valleys Taylor Glacier |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys Taylor Glacier |
op_source |
Geomicrobiology journal |
op_relation |
uri/info:doi/10.1080/01490451.2013.811316 uri/info:scp/84887037412 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/149227 |
_version_ |
1766205123628892160 |