Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments
Marine fjords with active glacier outlets are hot spots for organic matter burial in the sediments and subsequent microbial mineralization. Here, we investigated controls on microbial community assembly in sub-arctic glacier-influenced (GI) and non-glacier-influenced (NGI) marine sediments in the Go...
Published in: | Frontiers in Microbiology |
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Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://pure.au.dk/portal/da/publications/glacial-runoff-promotes-deep-burial-of-sulfur-cyclingassociated-microorganisms-in-marine-sediments(fa775fef-4b9f-454d-b73c-c50c3fb46d14).html https://doi.org/10.3389/fmicb.2019.02558 https://pure.au.dk/ws/files/198423990/fmicb_10_02558.pdf http://www.scopus.com/inward/record.url?scp=85075581969&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/fa775fef-4b9f-454d-b73c-c50c3fb46d14 2023-05-15T15:01:51+02:00 Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments Pelikan, Claus Jaussi, Marion Wasmund, Kenneth Seidenkrantz, Marit Solveig Pearce, Christof Kuzyk, Zou Zou Anna Herbold, Craig W. Røy, Hans Kjeldsen, Kasper Urup Loy, Alexander 2019-11-07 application/pdf https://pure.au.dk/portal/da/publications/glacial-runoff-promotes-deep-burial-of-sulfur-cyclingassociated-microorganisms-in-marine-sediments(fa775fef-4b9f-454d-b73c-c50c3fb46d14).html https://doi.org/10.3389/fmicb.2019.02558 https://pure.au.dk/ws/files/198423990/fmicb_10_02558.pdf http://www.scopus.com/inward/record.url?scp=85075581969&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Pelikan , C , Jaussi , M , Wasmund , K , Seidenkrantz , M S , Pearce , C , Kuzyk , Z Z A , Herbold , C W , Røy , H , Kjeldsen , K U & Loy , A 2019 , ' Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments ' , Frontiers in Microbiology , vol. 10 , 2558 . https://doi.org/10.3389/fmicb.2019.02558 arctic deep biosphere glacial impact Greenland marine sediment microbial community assembly sulfate-reducing microorganisms article 2019 ftuniaarhuspubl https://doi.org/10.3389/fmicb.2019.02558 2021-02-03T23:45:16Z Marine fjords with active glacier outlets are hot spots for organic matter burial in the sediments and subsequent microbial mineralization. Here, we investigated controls on microbial community assembly in sub-arctic glacier-influenced (GI) and non-glacier-influenced (NGI) marine sediments in the Godthåbsfjord region, south-western Greenland. We used a correlative approach integrating 16S rRNA gene and dissimilatory sulfite reductase (dsrB) amplicon sequence data over six meters of depth with biogeochemistry, sulfur-cycling activities, and sediment ages. GI sediments were characterized by comparably high sedimentation rates and had “young” sediment ages of <500 years even at 6 m sediment depth. In contrast, NGI stations reached ages of approximately 10,000 years at these depths. Sediment age-depth relationships, sulfate reduction rates (SRR), and C/N ratios were strongly correlated with differences in microbial community composition between GI and NGI sediments, indicating that age and diagenetic state were key drivers of microbial community assembly in subsurface sediments. Similar bacterial and archaeal communities were present in the surface sediments of all stations, whereas only in GI sediments were many surface taxa also abundant through the whole sediment core. The relative abundance of these taxa, including diverse Desulfobacteraceae members, correlated positively with SRRs, indicating their active contributions to sulfur-cycling processes. In contrast, other surface community members, such as Desulfatiglans, Atribacteria, and Chloroflexi, survived the slow sediment burial at NGI stations and dominated in the deepest sediment layers. These taxa are typical for the energy-limited marine deep biosphere and their relative abundances correlated positively with sediment age. In conclusion, our data suggests that high rates of sediment accumulation caused by glacier runoff and associated changes in biogeochemistry, promote persistence of sulfur-cycling activity and burial of a larger fraction of the surface microbial community into the deep subsurface. Article in Journal/Newspaper Arctic glacier Godthåbsfjord Greenland Aarhus University: Research Arctic Greenland Frontiers in Microbiology 10 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
arctic deep biosphere glacial impact Greenland marine sediment microbial community assembly sulfate-reducing microorganisms |
spellingShingle |
arctic deep biosphere glacial impact Greenland marine sediment microbial community assembly sulfate-reducing microorganisms Pelikan, Claus Jaussi, Marion Wasmund, Kenneth Seidenkrantz, Marit Solveig Pearce, Christof Kuzyk, Zou Zou Anna Herbold, Craig W. Røy, Hans Kjeldsen, Kasper Urup Loy, Alexander Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments |
topic_facet |
arctic deep biosphere glacial impact Greenland marine sediment microbial community assembly sulfate-reducing microorganisms |
description |
Marine fjords with active glacier outlets are hot spots for organic matter burial in the sediments and subsequent microbial mineralization. Here, we investigated controls on microbial community assembly in sub-arctic glacier-influenced (GI) and non-glacier-influenced (NGI) marine sediments in the Godthåbsfjord region, south-western Greenland. We used a correlative approach integrating 16S rRNA gene and dissimilatory sulfite reductase (dsrB) amplicon sequence data over six meters of depth with biogeochemistry, sulfur-cycling activities, and sediment ages. GI sediments were characterized by comparably high sedimentation rates and had “young” sediment ages of <500 years even at 6 m sediment depth. In contrast, NGI stations reached ages of approximately 10,000 years at these depths. Sediment age-depth relationships, sulfate reduction rates (SRR), and C/N ratios were strongly correlated with differences in microbial community composition between GI and NGI sediments, indicating that age and diagenetic state were key drivers of microbial community assembly in subsurface sediments. Similar bacterial and archaeal communities were present in the surface sediments of all stations, whereas only in GI sediments were many surface taxa also abundant through the whole sediment core. The relative abundance of these taxa, including diverse Desulfobacteraceae members, correlated positively with SRRs, indicating their active contributions to sulfur-cycling processes. In contrast, other surface community members, such as Desulfatiglans, Atribacteria, and Chloroflexi, survived the slow sediment burial at NGI stations and dominated in the deepest sediment layers. These taxa are typical for the energy-limited marine deep biosphere and their relative abundances correlated positively with sediment age. In conclusion, our data suggests that high rates of sediment accumulation caused by glacier runoff and associated changes in biogeochemistry, promote persistence of sulfur-cycling activity and burial of a larger fraction of the surface microbial community into the deep subsurface. |
format |
Article in Journal/Newspaper |
author |
Pelikan, Claus Jaussi, Marion Wasmund, Kenneth Seidenkrantz, Marit Solveig Pearce, Christof Kuzyk, Zou Zou Anna Herbold, Craig W. Røy, Hans Kjeldsen, Kasper Urup Loy, Alexander |
author_facet |
Pelikan, Claus Jaussi, Marion Wasmund, Kenneth Seidenkrantz, Marit Solveig Pearce, Christof Kuzyk, Zou Zou Anna Herbold, Craig W. Røy, Hans Kjeldsen, Kasper Urup Loy, Alexander |
author_sort |
Pelikan, Claus |
title |
Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments |
title_short |
Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments |
title_full |
Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments |
title_fullStr |
Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments |
title_full_unstemmed |
Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments |
title_sort |
glacial runoff promotes deep burial of sulfur cycling-associated microorganisms in marine sediments |
publishDate |
2019 |
url |
https://pure.au.dk/portal/da/publications/glacial-runoff-promotes-deep-burial-of-sulfur-cyclingassociated-microorganisms-in-marine-sediments(fa775fef-4b9f-454d-b73c-c50c3fb46d14).html https://doi.org/10.3389/fmicb.2019.02558 https://pure.au.dk/ws/files/198423990/fmicb_10_02558.pdf http://www.scopus.com/inward/record.url?scp=85075581969&partnerID=8YFLogxK |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic glacier Godthåbsfjord Greenland |
genre_facet |
Arctic glacier Godthåbsfjord Greenland |
op_source |
Pelikan , C , Jaussi , M , Wasmund , K , Seidenkrantz , M S , Pearce , C , Kuzyk , Z Z A , Herbold , C W , Røy , H , Kjeldsen , K U & Loy , A 2019 , ' Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments ' , Frontiers in Microbiology , vol. 10 , 2558 . https://doi.org/10.3389/fmicb.2019.02558 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmicb.2019.02558 |
container_title |
Frontiers in Microbiology |
container_volume |
10 |
_version_ |
1766333851579187200 |