Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments
Subglacial environments are known to harbour metabolically diverse microbial communities. These microbial communities drive chemical weathering of underlying bedrock and influence the geochemistry of glacial meltwater. Despite its importance in weathering reactions, the microbial cycling of iron in...
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Online Access: | https://research.manchester.ac.uk/en/publications/d757f5ec-e6b0-4f88-939b-bb78d305ce58 https://doi.org/10.5194/bg-14-1445-2017 http://www.scopus.com/inward/record.url?scp=85016164600&partnerID=8YFLogxK |
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ftumanchesterpub:oai:pure.atira.dk:publications/d757f5ec-e6b0-4f88-939b-bb78d305ce58 2023-11-12T04:05:32+01:00 Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments Nixon, Sophie L. Telling, Jon P. Wadham, Jemma L. Cockell, Charles S. 2017-03-21 https://research.manchester.ac.uk/en/publications/d757f5ec-e6b0-4f88-939b-bb78d305ce58 https://doi.org/10.5194/bg-14-1445-2017 http://www.scopus.com/inward/record.url?scp=85016164600&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Nixon , S L , Telling , J P , Wadham , J L & Cockell , C S 2017 , ' Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments ' , Biogeosciences , vol. 14 , no. 6 , pp. 1445-1455 . https://doi.org/10.5194/bg-14-1445-2017 article 2017 ftumanchesterpub https://doi.org/10.5194/bg-14-1445-2017 2023-10-30T09:13:34Z Subglacial environments are known to harbour metabolically diverse microbial communities. These microbial communities drive chemical weathering of underlying bedrock and influence the geochemistry of glacial meltwater. Despite its importance in weathering reactions, the microbial cycling of iron in subglacial environments, in particular the role of microbial iron reduction, is poorly understood. In this study we address the prevalence of viable iron-reducing microorganisms in subglacial sediments from five geographically isolated glaciers. Iron-reducing enrichment cultures were established with sediment from beneath Engabreen (Norway), Finsterwalderbreen (Svalbard), Leverett and Russell glaciers (Greenland), and Lower Wright Glacier (Antarctica). Rates of iron reduction were higher at 4 °C compared with 15 °C in all but one duplicated second-generation enrichment culture, indicative of cold-tolerant and perhaps cold-adapted iron reducers. Analysis of bacterial 16S rRNA genes indicates Desulfosporosinus were the dominant iron-reducing microorganisms in low-temperature Engabreen, Finsterwalderbreen and Lower Wright Glacier enrichments, and Geobacter dominated in Russell and Leverett enrichments. Results from this study suggest microbial iron reduction is widespread in subglacial environments and may have important implications for global biogeochemical iron cycling and export to marine ecosystems. Article in Journal/Newspaper Antarc* Antarctica glacier glacier glacier Greenland Svalbard The University of Manchester: Research Explorer Engabreen ENVELOPE(13.771,13.771,66.682,66.682) Finsterwalderbreen ENVELOPE(15.273,15.273,77.489,77.489) Greenland Norway Svalbard Wright Glacier ENVELOPE(-133.387,-133.387,58.399,58.399) Biogeosciences 14 6 1445 1455 |
institution |
Open Polar |
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The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
Subglacial environments are known to harbour metabolically diverse microbial communities. These microbial communities drive chemical weathering of underlying bedrock and influence the geochemistry of glacial meltwater. Despite its importance in weathering reactions, the microbial cycling of iron in subglacial environments, in particular the role of microbial iron reduction, is poorly understood. In this study we address the prevalence of viable iron-reducing microorganisms in subglacial sediments from five geographically isolated glaciers. Iron-reducing enrichment cultures were established with sediment from beneath Engabreen (Norway), Finsterwalderbreen (Svalbard), Leverett and Russell glaciers (Greenland), and Lower Wright Glacier (Antarctica). Rates of iron reduction were higher at 4 °C compared with 15 °C in all but one duplicated second-generation enrichment culture, indicative of cold-tolerant and perhaps cold-adapted iron reducers. Analysis of bacterial 16S rRNA genes indicates Desulfosporosinus were the dominant iron-reducing microorganisms in low-temperature Engabreen, Finsterwalderbreen and Lower Wright Glacier enrichments, and Geobacter dominated in Russell and Leverett enrichments. Results from this study suggest microbial iron reduction is widespread in subglacial environments and may have important implications for global biogeochemical iron cycling and export to marine ecosystems. |
format |
Article in Journal/Newspaper |
author |
Nixon, Sophie L. Telling, Jon P. Wadham, Jemma L. Cockell, Charles S. |
spellingShingle |
Nixon, Sophie L. Telling, Jon P. Wadham, Jemma L. Cockell, Charles S. Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments |
author_facet |
Nixon, Sophie L. Telling, Jon P. Wadham, Jemma L. Cockell, Charles S. |
author_sort |
Nixon, Sophie L. |
title |
Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments |
title_short |
Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments |
title_full |
Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments |
title_fullStr |
Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments |
title_full_unstemmed |
Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments |
title_sort |
viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments |
publishDate |
2017 |
url |
https://research.manchester.ac.uk/en/publications/d757f5ec-e6b0-4f88-939b-bb78d305ce58 https://doi.org/10.5194/bg-14-1445-2017 http://www.scopus.com/inward/record.url?scp=85016164600&partnerID=8YFLogxK |
long_lat |
ENVELOPE(13.771,13.771,66.682,66.682) ENVELOPE(15.273,15.273,77.489,77.489) ENVELOPE(-133.387,-133.387,58.399,58.399) |
geographic |
Engabreen Finsterwalderbreen Greenland Norway Svalbard Wright Glacier |
geographic_facet |
Engabreen Finsterwalderbreen Greenland Norway Svalbard Wright Glacier |
genre |
Antarc* Antarctica glacier glacier glacier Greenland Svalbard |
genre_facet |
Antarc* Antarctica glacier glacier glacier Greenland Svalbard |
op_source |
Nixon , S L , Telling , J P , Wadham , J L & Cockell , C S 2017 , ' Viable cold-tolerant iron-reducing microorganisms in geographically diverse subglacial environments ' , Biogeosciences , vol. 14 , no. 6 , pp. 1445-1455 . https://doi.org/10.5194/bg-14-1445-2017 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-14-1445-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
6 |
container_start_page |
1445 |
op_container_end_page |
1455 |
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1782342022002114560 |