Microbes influence the biogeochemical and optical properties of maritime Antarctic snow
Snowmelt 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 ter...
Published in: | Journal of Geophysical Research: Biogeosciences |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:31246 2023-05-15T13:56:54+02:00 Microbes influence the biogeochemical and optical properties of maritime Antarctic snow Hodson, Andy Nowak, Aga Cook, J. Sabacka, Marie Wharfe, E. S. Pearce, David Convey, Peter Vieira, Gonçalo 2017-06 text https://nrl.northumbria.ac.uk/id/eprint/31246/ https://doi.org/10.1002/2016JG003694 https://nrl.northumbria.ac.uk/id/eprint/31246/1/Hodson_et_al-2017-Journal_of_Geophysical_Research-_Biogeosciences.pdf en eng 2169-8953 https://nrl.northumbria.ac.uk/id/eprint/31246/1/Hodson_et_al-2017-Journal_of_Geophysical_Research-_Biogeosciences.pdf Hodson, Andy, Nowak, Aga, Cook, J., Sabacka, Marie, Wharfe, E. S., Pearce, David, Convey, Peter and Vieira, Gonçalo (2017) Microbes influence the biogeochemical and optical properties of maritime Antarctic snow. Journal of Geophysical Research: Biogeosciences, 122 (6). pp. 1456-1470. ISSN 2169-8953 cc_by_4_0 CC-BY F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2017 ftunivnorthumb https://doi.org/10.1002/2016JG003694 2022-09-25T06:05:50Z Snowmelt 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, while 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 Northumbria University, Newcastle: Northumbria Research Link (NRL) Antarctic Antarctic Peninsula Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) The Antarctic Journal of Geophysical Research: Biogeosciences 122 6 1456 1470 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Hodson, Andy Nowak, Aga Cook, J. Sabacka, Marie Wharfe, E. S. Pearce, David Convey, Peter Vieira, Gonçalo Microbes influence the biogeochemical and optical properties of maritime Antarctic snow |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Snowmelt 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, while 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, Andy Nowak, Aga Cook, J. Sabacka, Marie Wharfe, E. S. Pearce, David Convey, Peter Vieira, Gonçalo |
author_facet |
Hodson, Andy Nowak, Aga Cook, J. Sabacka, Marie Wharfe, E. S. Pearce, David Convey, Peter Vieira, Gonçalo |
author_sort |
Hodson, Andy |
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 |
2169-8953 |
publishDate |
2017 |
url |
https://nrl.northumbria.ac.uk/id/eprint/31246/ https://doi.org/10.1002/2016JG003694 https://nrl.northumbria.ac.uk/id/eprint/31246/1/Hodson_et_al-2017-Journal_of_Geophysical_Research-_Biogeosciences.pdf |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Livingston Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Livingston Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Livingston Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Livingston Island |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/31246/1/Hodson_et_al-2017-Journal_of_Geophysical_Research-_Biogeosciences.pdf Hodson, Andy, Nowak, Aga, Cook, J., Sabacka, Marie, Wharfe, E. S., Pearce, David, Convey, Peter and Vieira, Gonçalo (2017) Microbes influence the biogeochemical and optical properties of maritime Antarctic snow. Journal of Geophysical Research: Biogeosciences, 122 (6). pp. 1456-1470. ISSN 2169-8953 |
op_rights |
cc_by_4_0 |
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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1766264488696217600 |