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 |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press
2016
|
Subjects: | |
Online Access: | https://orca.cardiff.ac.uk/id/eprint/89434/ https://doi.org/10.1093/femsec/fiw076 https://orca.cardiff.ac.uk/id/eprint/89434/1/fiw076.full.pdf |
id |
ftunivcardiff:oai:https://orca.cardiff.ac.uk:89434 |
---|---|
record_format |
openpolar |
spelling |
ftunivcardiff:oai:https://orca.cardiff.ac.uk:89434 2023-05-15T14:01:42+02:00 Response of Antarctic cryoconite microbial communities to light Bagshaw, Elizabeth Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Gordon Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G. Fitzsimons, Sean Dubnick, Ashley 2016-06 application/pdf https://orca.cardiff.ac.uk/id/eprint/89434/ https://doi.org/10.1093/femsec/fiw076 https://orca.cardiff.ac.uk/id/eprint/89434/1/fiw076.full.pdf en eng Oxford University Press https://orca.cardiff.ac.uk/id/eprint/89434/1/fiw076.full.pdf Bagshaw, Elizabeth https://orca.cardiff.ac.uk/view/cardiffauthors/A1991811U.html orcid:0000-0001-8392-1750 orcid:0000-0001-8392-1750, Wadham, Jemma L., Tranter, Martyn, Perkins, Rupert Gordon https://orca.cardiff.ac.uk/view/cardiffauthors/A0101677.html orcid:0000-0002-0810-2656 orcid:0000-0002-0810-2656, Morgan, Alistair, Williamson, Christopher J., Fountain, Andrew G., Fitzsimons, Sean and Dubnick, Ashley 2016. Response of Antarctic cryoconite microbial communities to light. FEMS Microbiology Ecology 92 (6) , fiw076. 10.1093/femsec/fiw076 https://doi.org/10.1093/femsec%2Ffiw076 file https://orca.cardiff.ac.uk/89434/1/fiw076.full.pdf doi:10.1093/femsec/fiw076 cc_by CC-BY Article PeerReviewed 2016 ftunivcardiff https://doi.org/10.1093/femsec/fiw076 2022-11-03T23:38:36Z 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 Cardiff University: ORCA (Online Research @ Cardiff) 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 |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
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 Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Gordon Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G. Fitzsimons, Sean Dubnick, Ashley |
spellingShingle |
Bagshaw, Elizabeth Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Gordon Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G. Fitzsimons, Sean Dubnick, Ashley Response of Antarctic cryoconite microbial communities to light |
author_facet |
Bagshaw, Elizabeth Wadham, Jemma L. Tranter, Martyn Perkins, Rupert Gordon Morgan, Alistair Williamson, Christopher J. Fountain, Andrew G. Fitzsimons, Sean Dubnick, Ashley |
author_sort |
Bagshaw, Elizabeth |
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 |
publisher |
Oxford University Press |
publishDate |
2016 |
url |
https://orca.cardiff.ac.uk/id/eprint/89434/ https://doi.org/10.1093/femsec/fiw076 https://orca.cardiff.ac.uk/id/eprint/89434/1/fiw076.full.pdf |
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_relation |
https://orca.cardiff.ac.uk/id/eprint/89434/1/fiw076.full.pdf Bagshaw, Elizabeth https://orca.cardiff.ac.uk/view/cardiffauthors/A1991811U.html orcid:0000-0001-8392-1750 orcid:0000-0001-8392-1750, Wadham, Jemma L., Tranter, Martyn, Perkins, Rupert Gordon https://orca.cardiff.ac.uk/view/cardiffauthors/A0101677.html orcid:0000-0002-0810-2656 orcid:0000-0002-0810-2656, Morgan, Alistair, Williamson, Christopher J., Fountain, Andrew G., Fitzsimons, Sean and Dubnick, Ashley 2016. Response of Antarctic cryoconite microbial communities to light. FEMS Microbiology Ecology 92 (6) , fiw076. 10.1093/femsec/fiw076 https://doi.org/10.1093/femsec%2Ffiw076 file https://orca.cardiff.ac.uk/89434/1/fiw076.full.pdf doi:10.1093/femsec/fiw076 |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1093/femsec/fiw076 |
container_title |
FEMS Microbiology Ecology |
container_volume |
92 |
container_issue |
6 |
container_start_page |
fiw076 |
_version_ |
1766271740986523648 |