Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt
Snowpack ecosystem studies are primarily derived from research on snow-on-soil ecosystems. Greater research attention needs to be directed to the study of glacial snow covers as most snow cover lies on glaciers and ice sheets. With rising temperatures, snowpacks are getting wetter, which can potenti...
Published in: | Journal of Geophysical Research: Biogeosciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2023
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/3103112 https://doi.org/10.1029/2022JG007176 |
id |
fthsvestlandet:oai:hvlopen.brage.unit.no:11250/3103112 |
---|---|
record_format |
openpolar |
spelling |
fthsvestlandet:oai:hvlopen.brage.unit.no:11250/3103112 2024-03-03T08:41:51+00:00 Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt Dayal, Archana Hodson, Andrew Šabacká, M. Smalley, A.L. 2023 application/pdf https://hdl.handle.net/11250/3103112 https://doi.org/10.1029/2022JG007176 eng eng American Geophysical Union Norges forskningsråd: 288402 Journal of Geophysical Research (JGR): Biogeosciences. 2023, 128 (10), . urn:issn:2169-8953 https://hdl.handle.net/11250/3103112 https://doi.org/10.1029/2022JG007176 cristin:2185613 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023. The Authors 15 128 Journal of Geophysical Research (JGR): Biogeosciences 10 Peer reviewed Journal article 2023 fthsvestlandet https://doi.org/10.1029/2022JG007176 2024-02-02T12:40:41Z Snowpack ecosystem studies are primarily derived from research on snow-on-soil ecosystems. Greater research attention needs to be directed to the study of glacial snow covers as most snow cover lies on glaciers and ice sheets. With rising temperatures, snowpacks are getting wetter, which can potentially give rise to biologically productive snowpacks. The present study set out to determine the linkage between the thermal evolution of a snowpack and the seasonal microbial ecology of snow. We present the first comprehensive study of the seasonal microbial activity and biogeochemistry within a melting glacial snowpack on a High Arctic ice cap, Foxfonna, in Svalbard. Nutrients from winter atmospheric bulk deposition were supplemented by dust fertilization and weathering processes. NH4+ and PO43− resources in the snow therefore reached their highest values during late June and early July, at 22 and 13.9 mg m−2, respectively. However, primary production did not respond to this nutrient resource due to an absence of autotrophs in the snowpack. The average autotrophic abundance on the ice cap throughout the melt season was 0.5 ± 2.7 cells mL−1. Instead, the microbial cell abundance was dominated by bacterial cells that increased from an average of (39 ± 19 cells mL−1) in June to (363 ± 595 cells mL−1) in early July. Thus, the total seasonal biological production on Foxfonna was estimated at 153 mg C m−2, and the glacial snowpack microbial ecosystem was identified as net-heterotrophic. This work presents a seasonal “album” documenting the bacterial ecology of glacial snowpacks. publishedVersion Article in Journal/Newspaper Arctic Ice cap Svalbard Høgskulen på Vestlandet: HVL Open Arctic Svalbard Foxfonna ENVELOPE(16.200,16.200,78.133,78.133) Journal of Geophysical Research: Biogeosciences 128 10 |
institution |
Open Polar |
collection |
Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
description |
Snowpack ecosystem studies are primarily derived from research on snow-on-soil ecosystems. Greater research attention needs to be directed to the study of glacial snow covers as most snow cover lies on glaciers and ice sheets. With rising temperatures, snowpacks are getting wetter, which can potentially give rise to biologically productive snowpacks. The present study set out to determine the linkage between the thermal evolution of a snowpack and the seasonal microbial ecology of snow. We present the first comprehensive study of the seasonal microbial activity and biogeochemistry within a melting glacial snowpack on a High Arctic ice cap, Foxfonna, in Svalbard. Nutrients from winter atmospheric bulk deposition were supplemented by dust fertilization and weathering processes. NH4+ and PO43− resources in the snow therefore reached their highest values during late June and early July, at 22 and 13.9 mg m−2, respectively. However, primary production did not respond to this nutrient resource due to an absence of autotrophs in the snowpack. The average autotrophic abundance on the ice cap throughout the melt season was 0.5 ± 2.7 cells mL−1. Instead, the microbial cell abundance was dominated by bacterial cells that increased from an average of (39 ± 19 cells mL−1) in June to (363 ± 595 cells mL−1) in early July. Thus, the total seasonal biological production on Foxfonna was estimated at 153 mg C m−2, and the glacial snowpack microbial ecosystem was identified as net-heterotrophic. This work presents a seasonal “album” documenting the bacterial ecology of glacial snowpacks. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Dayal, Archana Hodson, Andrew Šabacká, M. Smalley, A.L. |
spellingShingle |
Dayal, Archana Hodson, Andrew Šabacká, M. Smalley, A.L. Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt |
author_facet |
Dayal, Archana Hodson, Andrew Šabacká, M. Smalley, A.L. |
author_sort |
Dayal, Archana |
title |
Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt |
title_short |
Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt |
title_full |
Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt |
title_fullStr |
Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt |
title_full_unstemmed |
Seasonal Snowpack Microbial Ecology and Biogeochemistry on a High Arctic Ice Cap Reveals Negligible Autotrophic Activity During Spring and Summer Melt |
title_sort |
seasonal snowpack microbial ecology and biogeochemistry on a high arctic ice cap reveals negligible autotrophic activity during spring and summer melt |
publisher |
American Geophysical Union |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3103112 https://doi.org/10.1029/2022JG007176 |
long_lat |
ENVELOPE(16.200,16.200,78.133,78.133) |
geographic |
Arctic Svalbard Foxfonna |
geographic_facet |
Arctic Svalbard Foxfonna |
genre |
Arctic Ice cap Svalbard |
genre_facet |
Arctic Ice cap Svalbard |
op_source |
15 128 Journal of Geophysical Research (JGR): Biogeosciences 10 |
op_relation |
Norges forskningsråd: 288402 Journal of Geophysical Research (JGR): Biogeosciences. 2023, 128 (10), . urn:issn:2169-8953 https://hdl.handle.net/11250/3103112 https://doi.org/10.1029/2022JG007176 cristin:2185613 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023. The Authors |
op_doi |
https://doi.org/10.1029/2022JG007176 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
128 |
container_issue |
10 |
_version_ |
1792497424333275136 |