Microbes influence the biogeochemical and optical properties of maritime Antarctic snow
Snow melt in the Antarctic Peninsula Region has increased significantly in recent decades, leading to greater liquid water availability across a more expansive area. As a consequence, changes in the biological activity within wet Antarctic snow require consideration if we are to better understand te...
Published in: | Journal of Geophysical Research: Biogeosciences |
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ftnerc:oai:nora.nerc.ac.uk:515059 2023-05-15T13:49:33+02:00 Microbes influence the biogeochemical and optical properties of maritime Antarctic snow Hodson, A.J. Nowak, A. Cook, J. Sabacka, M. Wharfe, E.S. Pearce, D.A. Convey, P. Vieira, G. 2017-06 text http://nora.nerc.ac.uk/id/eprint/515059/ https://nora.nerc.ac.uk/id/eprint/515059/1/Hodson_et_al-2017-Journal_of_Geophysical_Research__Biogeosciences.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2016JG003694/abstract en eng Wiley https://nora.nerc.ac.uk/id/eprint/515059/1/Hodson_et_al-2017-Journal_of_Geophysical_Research__Biogeosciences.pdf Hodson, A.J.; Nowak, A.; Cook, J.; Sabacka, M.; Wharfe, E.S.; Pearce, D.A.; Convey, P. orcid:0000-0001-8497-9903 Vieira, G. 2017 Microbes influence the biogeochemical and optical properties of maritime Antarctic snow. Journal of Geophysical Research - Biogeosciences, 122 (6). 1456-1470. https://doi.org/10.1002/2016JG003694 <https://doi.org/10.1002/2016JG003694> cc_by_4 CC-BY Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1002/2016JG003694 2023-02-04T19:43:51Z Snow melt in the Antarctic Peninsula Region has increased significantly in recent decades, leading to greater liquid water availability across a more expansive area. As a consequence, changes in the biological activity within wet Antarctic snow require consideration if we are to better understand terrestrial carbon cycling on Earth's coldest continent. This paper therefore examines the relationship between microbial communities and the chemical and physical environment of wet snow habitats on Livingston Island of the maritime Antarctic. In so doing, we reveal a strong reduction in bacterial diversity and autotrophic biomass within a short (<1 km) distance from the coast. Coastal snowpacks, fertilized by greater amounts of nutrients from rock debris and marine fauna, develop obvious, pigmented snow algal communities that control the absorption of visible light to a far greater extent than with the inland glacial snowpacks. Absorption by carotenoid pigments is most influential at the surface, whilst chlorophyll is most influential beneath it. The coastal snowpacks also indicate higher concentrations of dissolved inorganic carbon and CO2 in interstitial air, as well as a close relationship between chlorophyll and dissolved organic carbon (DOC). As a consequence, the DOC resource available in coastal snow can support a more diverse bacterial community that includes microorganisms from a range of nearby terrestrial and marine habitats. Therefore, since further expansion of the melt zone will influence glacial snowpacks more than coastal ones, care must be taken when considering the types of communities that may be expected to evolve there. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Livingston Island Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Journal of Geophysical Research: Biogeosciences 122 6 1456 1470 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Snow melt in the Antarctic Peninsula Region has increased significantly in recent decades, leading to greater liquid water availability across a more expansive area. As a consequence, changes in the biological activity within wet Antarctic snow require consideration if we are to better understand terrestrial carbon cycling on Earth's coldest continent. This paper therefore examines the relationship between microbial communities and the chemical and physical environment of wet snow habitats on Livingston Island of the maritime Antarctic. In so doing, we reveal a strong reduction in bacterial diversity and autotrophic biomass within a short (<1 km) distance from the coast. Coastal snowpacks, fertilized by greater amounts of nutrients from rock debris and marine fauna, develop obvious, pigmented snow algal communities that control the absorption of visible light to a far greater extent than with the inland glacial snowpacks. Absorption by carotenoid pigments is most influential at the surface, whilst chlorophyll is most influential beneath it. The coastal snowpacks also indicate higher concentrations of dissolved inorganic carbon and CO2 in interstitial air, as well as a close relationship between chlorophyll and dissolved organic carbon (DOC). As a consequence, the DOC resource available in coastal snow can support a more diverse bacterial community that includes microorganisms from a range of nearby terrestrial and marine habitats. Therefore, since further expansion of the melt zone will influence glacial snowpacks more than coastal ones, care must be taken when considering the types of communities that may be expected to evolve there. |
format |
Article in Journal/Newspaper |
author |
Hodson, A.J. Nowak, A. Cook, J. Sabacka, M. Wharfe, E.S. Pearce, D.A. Convey, P. Vieira, G. |
spellingShingle |
Hodson, A.J. Nowak, A. Cook, J. Sabacka, M. Wharfe, E.S. Pearce, D.A. Convey, P. Vieira, G. Microbes influence the biogeochemical and optical properties of maritime Antarctic snow |
author_facet |
Hodson, A.J. Nowak, A. Cook, J. Sabacka, M. Wharfe, E.S. Pearce, D.A. Convey, P. Vieira, G. |
author_sort |
Hodson, A.J. |
title |
Microbes influence the biogeochemical and optical properties of maritime Antarctic snow |
title_short |
Microbes influence the biogeochemical and optical properties of maritime Antarctic snow |
title_full |
Microbes influence the biogeochemical and optical properties of maritime Antarctic snow |
title_fullStr |
Microbes influence the biogeochemical and optical properties of maritime Antarctic snow |
title_full_unstemmed |
Microbes influence the biogeochemical and optical properties of maritime Antarctic snow |
title_sort |
microbes influence the biogeochemical and optical properties of maritime antarctic snow |
publisher |
Wiley |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/515059/ https://nora.nerc.ac.uk/id/eprint/515059/1/Hodson_et_al-2017-Journal_of_Geophysical_Research__Biogeosciences.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2016JG003694/abstract |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Livingston Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Livingston Island |
genre |
Antarc* Antarctic Antarctic Peninsula Livingston Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Livingston Island |
op_relation |
https://nora.nerc.ac.uk/id/eprint/515059/1/Hodson_et_al-2017-Journal_of_Geophysical_Research__Biogeosciences.pdf Hodson, A.J.; Nowak, A.; Cook, J.; Sabacka, M.; Wharfe, E.S.; Pearce, D.A.; Convey, P. orcid:0000-0001-8497-9903 Vieira, G. 2017 Microbes influence the biogeochemical and optical properties of maritime Antarctic snow. Journal of Geophysical Research - Biogeosciences, 122 (6). 1456-1470. https://doi.org/10.1002/2016JG003694 <https://doi.org/10.1002/2016JG003694> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/2016JG003694 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
122 |
container_issue |
6 |
container_start_page |
1456 |
op_container_end_page |
1470 |
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1766251584435519488 |