Response of Antarctic cryoconite microbial communities to light
Microbial communities on polar glacier surfaces are found dispersed on the ice surface, or concentrated in cryoconite holes and cryolakes, which are accumulations of debris covered by a layer of ice for some or all of the year. The ice lid limits the penetration of photosynthetically available radia...
Published in: | FEMS Microbiology Ecology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2016
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Online Access: | https://hdl.handle.net/1983/a60eaa01-3f04-4ff3-ad26-19767a428e35 https://research-information.bris.ac.uk/en/publications/a60eaa01-3f04-4ff3-ad26-19767a428e35 https://doi.org/10.1093/femsec/fiw076 https://research-information.bris.ac.uk/ws/files/89444677/fiw076.full.pdf http://www.scopus.com/inward/record.url?scp=84973126866&partnerID=8YFLogxK |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/a60eaa01-3f04-4ff3-ad26-19767a428e35 2024-01-07T09:40:06+01:00 Response of Antarctic cryoconite microbial communities to light Bagshaw, Elizabeth A. Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G Fitzsimons, Sean Dubnick, Ashley J 2016-06 application/pdf https://hdl.handle.net/1983/a60eaa01-3f04-4ff3-ad26-19767a428e35 https://research-information.bris.ac.uk/en/publications/a60eaa01-3f04-4ff3-ad26-19767a428e35 https://doi.org/10.1093/femsec/fiw076 https://research-information.bris.ac.uk/ws/files/89444677/fiw076.full.pdf http://www.scopus.com/inward/record.url?scp=84973126866&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Bagshaw , E A , Wadham , J L , Tranter , M , Perkins , R , Morgan , A , Williamson , C J , Fountain , A G , Fitzsimons , S & Dubnick , A J 2016 , ' Response of Antarctic cryoconite microbial communities to light ' , FEMS Microbiology Ecology , vol. 92 , no. 6 , fiw076 . https://doi.org/10.1093/femsec/fiw076 Cryoconite Glaciers PAR Photophysiology article 2016 ftubristolcris https://doi.org/10.1093/femsec/fiw076 2023-12-14T23:31:15Z Microbial communities on polar glacier surfaces are found dispersed on the ice surface, or concentrated in cryoconite holes and cryolakes, which are accumulations of debris covered by a layer of ice for some or all of the year. The ice lid limits the penetration of photosynthetically available radiation (PAR) to the sediment layer, since the ice attenuates up to 99% of incoming radiation. This suite of field and laboratory experiments demonstrates that PAR is an important control on primary production in cryoconite and cryolake ecosystems. Increased light intensity increased efficiency of primary production in controlled laboratory incubations of debris from the surface of Joyce Glacier, McMurdo Dry Valleys, Antarctica. However, when light intensity was increased to levels near that received on the ice surface, without the protection of an ice lid, efficiency decreased and measurements of photophysiology showed that the communities suffered light stress. The communities are therefore well adapted to low light levels. Comparison with Arctic cryoconite communities, which are typically not covered by an ice lid for the majority of the ablation season, showed that these organisms were also stressed by high light, so they must employ strategies to protect against photodamage. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys University of Bristol: Bristol Research Antarctic Arctic Joyce Glacier ENVELOPE(163.700,163.700,-78.017,-78.017) McMurdo Dry Valleys FEMS Microbiology Ecology 92 6 fiw076 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
Cryoconite Glaciers PAR Photophysiology |
spellingShingle |
Cryoconite Glaciers PAR Photophysiology Bagshaw, Elizabeth A. Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G Fitzsimons, Sean Dubnick, Ashley J Response of Antarctic cryoconite microbial communities to light |
topic_facet |
Cryoconite Glaciers PAR Photophysiology |
description |
Microbial communities on polar glacier surfaces are found dispersed on the ice surface, or concentrated in cryoconite holes and cryolakes, which are accumulations of debris covered by a layer of ice for some or all of the year. The ice lid limits the penetration of photosynthetically available radiation (PAR) to the sediment layer, since the ice attenuates up to 99% of incoming radiation. This suite of field and laboratory experiments demonstrates that PAR is an important control on primary production in cryoconite and cryolake ecosystems. Increased light intensity increased efficiency of primary production in controlled laboratory incubations of debris from the surface of Joyce Glacier, McMurdo Dry Valleys, Antarctica. However, when light intensity was increased to levels near that received on the ice surface, without the protection of an ice lid, efficiency decreased and measurements of photophysiology showed that the communities suffered light stress. The communities are therefore well adapted to low light levels. Comparison with Arctic cryoconite communities, which are typically not covered by an ice lid for the majority of the ablation season, showed that these organisms were also stressed by high light, so they must employ strategies to protect against photodamage. |
format |
Article in Journal/Newspaper |
author |
Bagshaw, Elizabeth A. Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G Fitzsimons, Sean Dubnick, Ashley J |
author_facet |
Bagshaw, Elizabeth A. Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G Fitzsimons, Sean Dubnick, Ashley J |
author_sort |
Bagshaw, Elizabeth A. |
title |
Response of Antarctic cryoconite microbial communities to light |
title_short |
Response of Antarctic cryoconite microbial communities to light |
title_full |
Response of Antarctic cryoconite microbial communities to light |
title_fullStr |
Response of Antarctic cryoconite microbial communities to light |
title_full_unstemmed |
Response of Antarctic cryoconite microbial communities to light |
title_sort |
response of antarctic cryoconite microbial communities to light |
publishDate |
2016 |
url |
https://hdl.handle.net/1983/a60eaa01-3f04-4ff3-ad26-19767a428e35 https://research-information.bris.ac.uk/en/publications/a60eaa01-3f04-4ff3-ad26-19767a428e35 https://doi.org/10.1093/femsec/fiw076 https://research-information.bris.ac.uk/ws/files/89444677/fiw076.full.pdf http://www.scopus.com/inward/record.url?scp=84973126866&partnerID=8YFLogxK |
long_lat |
ENVELOPE(163.700,163.700,-78.017,-78.017) |
geographic |
Antarctic Arctic Joyce Glacier McMurdo Dry Valleys |
geographic_facet |
Antarctic Arctic Joyce Glacier McMurdo Dry Valleys |
genre |
Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys |
op_source |
Bagshaw , E A , Wadham , J L , Tranter , M , Perkins , R , Morgan , A , Williamson , C J , Fountain , A G , Fitzsimons , S & Dubnick , A J 2016 , ' Response of Antarctic cryoconite microbial communities to light ' , FEMS Microbiology Ecology , vol. 92 , no. 6 , fiw076 . https://doi.org/10.1093/femsec/fiw076 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/femsec/fiw076 |
container_title |
FEMS Microbiology Ecology |
container_volume |
92 |
container_issue |
6 |
container_start_page |
fiw076 |
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1787430506101473280 |