Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance
Abstract Water logged habitats in continuous permafrost regions provide extensive oxic-anoxic interface habitats for iron cycling. The iron cycle interacts with the methane and phosphorus cycles, and is an important part of tundra biogeochemistry. Our objective was to characterize microbial communit...
Published in: | FEMS Microbiology Ecology |
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Oxford University Press (OUP)
2023
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Online Access: | http://dx.doi.org/10.1093/femsec/fiad013 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad013/49034366/fiad013.pdf https://academic.oup.com/femsec/article-pdf/99/3/fiad013/49523306/fiad013.pdf |
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croxfordunivpr:10.1093/femsec/fiad013 2024-09-15T18:30:06+00:00 Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance Michaud, Alexander B Massé, Rémi O Emerson, David National Science Foundation Division of Environmental Biology 2023 http://dx.doi.org/10.1093/femsec/fiad013 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad013/49034366/fiad013.pdf https://academic.oup.com/femsec/article-pdf/99/3/fiad013/49523306/fiad013.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model FEMS Microbiology Ecology volume 99, issue 3 ISSN 1574-6941 journal-article 2023 croxfordunivpr https://doi.org/10.1093/femsec/fiad013 2024-08-19T04:23:48Z Abstract Water logged habitats in continuous permafrost regions provide extensive oxic-anoxic interface habitats for iron cycling. The iron cycle interacts with the methane and phosphorus cycles, and is an important part of tundra biogeochemistry. Our objective was to characterize microbial communities associated with the iron cycle within natural and disturbed habitats of the Alaskan Arctic tundra. We sampled aquatic habitats within natural, undisturbed and anthropogenically disturbed areas and sequenced the 16S rRNA gene to describe the microbial communities, then supported these results with process rate and geochemical measurements. Undisturbed habitats have microbial communities that are significantly different than disturbed habitats. Microbial taxa known to participate in the iron and methane cycles are significantly associated with natural habitats, whereas they are not significantly associated with disturbed sites. Undisturbed habitats have significantly higher extractable iron and are more acidic than disturbed habitats sampled. Iron reduction is not measurable in disturbed aquatic habitats and is not stimulated by the addition of biogenic iron mats. Our study highlights the prevalence of Fe-cycling in undisturbed water-logged habitats, and demonstrates that anthropogenic disturbance of the tundra, due to legacy gravel mining, alters the microbiology of aquatic habitats and disrupts important biogeochemical cycles in the Arctic tundra. Article in Journal/Newspaper permafrost Tundra Oxford University Press FEMS Microbiology Ecology |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Water logged habitats in continuous permafrost regions provide extensive oxic-anoxic interface habitats for iron cycling. The iron cycle interacts with the methane and phosphorus cycles, and is an important part of tundra biogeochemistry. Our objective was to characterize microbial communities associated with the iron cycle within natural and disturbed habitats of the Alaskan Arctic tundra. We sampled aquatic habitats within natural, undisturbed and anthropogenically disturbed areas and sequenced the 16S rRNA gene to describe the microbial communities, then supported these results with process rate and geochemical measurements. Undisturbed habitats have microbial communities that are significantly different than disturbed habitats. Microbial taxa known to participate in the iron and methane cycles are significantly associated with natural habitats, whereas they are not significantly associated with disturbed sites. Undisturbed habitats have significantly higher extractable iron and are more acidic than disturbed habitats sampled. Iron reduction is not measurable in disturbed aquatic habitats and is not stimulated by the addition of biogenic iron mats. Our study highlights the prevalence of Fe-cycling in undisturbed water-logged habitats, and demonstrates that anthropogenic disturbance of the tundra, due to legacy gravel mining, alters the microbiology of aquatic habitats and disrupts important biogeochemical cycles in the Arctic tundra. |
author2 |
National Science Foundation Division of Environmental Biology |
format |
Article in Journal/Newspaper |
author |
Michaud, Alexander B Massé, Rémi O Emerson, David |
spellingShingle |
Michaud, Alexander B Massé, Rémi O Emerson, David Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance |
author_facet |
Michaud, Alexander B Massé, Rémi O Emerson, David |
author_sort |
Michaud, Alexander B |
title |
Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance |
title_short |
Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance |
title_full |
Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance |
title_fullStr |
Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance |
title_full_unstemmed |
Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance |
title_sort |
microbial iron cycling is prevalent in water-logged alaskan arctic tundra habitats, but sensitive to disturbance |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1093/femsec/fiad013 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad013/49034366/fiad013.pdf https://academic.oup.com/femsec/article-pdf/99/3/fiad013/49523306/fiad013.pdf |
genre |
permafrost Tundra |
genre_facet |
permafrost Tundra |
op_source |
FEMS Microbiology Ecology volume 99, issue 3 ISSN 1574-6941 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/femsec/fiad013 |
container_title |
FEMS Microbiology Ecology |
_version_ |
1810471587620585472 |