Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes
Tropospheric nitrate levels are predicted to increase throughout the 21 st century, with potential effects on terrestrial ecosystems, including the Greenland ice sheet (GrIS). This study considers the impacts of elevated nitrate concentrations on the abundance and composition of dominant bulk and ac...
Published in: | Environmental Microbiology Reports |
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Online Access: | https://curis.ku.dk/portal/da/publications/nitrate-addition-has-minimal-shortterm-impacts-on-greenland-ice-sheet-supraglacial-prokaryotes(46f3f7be-b02b-45d0-a628-5458a44b90e0).html https://doi.org/10.1111/1758-2229.12510 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/46f3f7be-b02b-45d0-a628-5458a44b90e0 2023-07-30T04:03:49+02:00 Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes Cameron, Karen A. Stibal, Marek Chrismas, Nathan Box, Jason E Jacobsen, Carsten S. 2017 https://curis.ku.dk/portal/da/publications/nitrate-addition-has-minimal-shortterm-impacts-on-greenland-ice-sheet-supraglacial-prokaryotes(46f3f7be-b02b-45d0-a628-5458a44b90e0).html https://doi.org/10.1111/1758-2229.12510 eng eng info:eu-repo/semantics/closedAccess Cameron , K A , Stibal , M , Chrismas , N , Box , J E & Jacobsen , C S 2017 , ' Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes ' , Environmental Microbiology Reports , vol. 9 , no. 2 , pp. 144-150 . https://doi.org/10.1111/1758-2229.12510 article 2017 ftcopenhagenunip https://doi.org/10.1111/1758-2229.12510 2023-07-12T23:02:29Z Tropospheric nitrate levels are predicted to increase throughout the 21 st century, with potential effects on terrestrial ecosystems, including the Greenland ice sheet (GrIS). This study considers the impacts of elevated nitrate concentrations on the abundance and composition of dominant bulk and active prokaryotic communities sampled from in situ nitrate fertilization plots on the GrIS surface. Nitrate concentrations were successfully elevated within sediment-filled meltwater pools, known as cryoconite holes; however, nitrate additions applied to surface ice did not persist. Estimated bulk and active cryoconite community cell abundance was unaltered by nitrate additions when compared to control holes using a quantitative PCR approach, and nitrate was found to have a minimal affect on the dominant 16S rRNA gene-based community composition. Together, these results indicate that sampled cryoconite communities were not nitrate limited at the time of sampling. Instead, temporal changes in biomass and community composition were more pronounced. As these in situ incubations were short (6 weeks), and the community composition across GrIS surface ice is highly variable, we suggest that further efforts should be considered to investigate the potential long-term impacts of increased nitrate across the GrIS. Article in Journal/Newspaper Greenland Ice Sheet University of Copenhagen: Research Greenland Environmental Microbiology Reports 9 2 144 150 |
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Open Polar |
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University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Tropospheric nitrate levels are predicted to increase throughout the 21 st century, with potential effects on terrestrial ecosystems, including the Greenland ice sheet (GrIS). This study considers the impacts of elevated nitrate concentrations on the abundance and composition of dominant bulk and active prokaryotic communities sampled from in situ nitrate fertilization plots on the GrIS surface. Nitrate concentrations were successfully elevated within sediment-filled meltwater pools, known as cryoconite holes; however, nitrate additions applied to surface ice did not persist. Estimated bulk and active cryoconite community cell abundance was unaltered by nitrate additions when compared to control holes using a quantitative PCR approach, and nitrate was found to have a minimal affect on the dominant 16S rRNA gene-based community composition. Together, these results indicate that sampled cryoconite communities were not nitrate limited at the time of sampling. Instead, temporal changes in biomass and community composition were more pronounced. As these in situ incubations were short (6 weeks), and the community composition across GrIS surface ice is highly variable, we suggest that further efforts should be considered to investigate the potential long-term impacts of increased nitrate across the GrIS. |
format |
Article in Journal/Newspaper |
author |
Cameron, Karen A. Stibal, Marek Chrismas, Nathan Box, Jason E Jacobsen, Carsten S. |
spellingShingle |
Cameron, Karen A. Stibal, Marek Chrismas, Nathan Box, Jason E Jacobsen, Carsten S. Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes |
author_facet |
Cameron, Karen A. Stibal, Marek Chrismas, Nathan Box, Jason E Jacobsen, Carsten S. |
author_sort |
Cameron, Karen A. |
title |
Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes |
title_short |
Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes |
title_full |
Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes |
title_fullStr |
Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes |
title_full_unstemmed |
Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes |
title_sort |
nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes |
publishDate |
2017 |
url |
https://curis.ku.dk/portal/da/publications/nitrate-addition-has-minimal-shortterm-impacts-on-greenland-ice-sheet-supraglacial-prokaryotes(46f3f7be-b02b-45d0-a628-5458a44b90e0).html https://doi.org/10.1111/1758-2229.12510 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Cameron , K A , Stibal , M , Chrismas , N , Box , J E & Jacobsen , C S 2017 , ' Nitrate addition has minimal short-term impacts on greenland ice sheet supraglacial prokaryotes ' , Environmental Microbiology Reports , vol. 9 , no. 2 , pp. 144-150 . https://doi.org/10.1111/1758-2229.12510 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/1758-2229.12510 |
container_title |
Environmental Microbiology Reports |
container_volume |
9 |
container_issue |
2 |
container_start_page |
144 |
op_container_end_page |
150 |
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1772814936419860480 |