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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Frontiers Media S.A.
2019
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Online Access: | https://doi.org/10.3389/fmicb.2019.02558 https://doaj.org/article/3ee56bdbf77747b7a3611151b8e75494 |
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ftdoajarticles:oai:doaj.org/article:3ee56bdbf77747b7a3611151b8e75494 2023-05-15T15:14:54+02:00 Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments Claus Pelikan Marion Jaussi Kenneth Wasmund Marit-Solveig Seidenkrantz Christof Pearce Zou Zou Anna Kuzyk Craig W. Herbold Hans Røy Kasper Urup Kjeldsen Alexander Loy 2019-11-01T00:00:00Z https://doi.org/10.3389/fmicb.2019.02558 https://doaj.org/article/3ee56bdbf77747b7a3611151b8e75494 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmicb.2019.02558/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2019.02558 https://doaj.org/article/3ee56bdbf77747b7a3611151b8e75494 Frontiers in Microbiology, Vol 10 (2019) sulfate-reducing microorganisms marine sediment glacial impact deep biosphere microbial community assembly Greenland Microbiology QR1-502 article 2019 ftdoajarticles https://doi.org/10.3389/fmicb.2019.02558 2022-12-31T06:31:08Z 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 ... Article in Journal/Newspaper Arctic glacier Godthåbsfjord Greenland Directory of Open Access Journals: DOAJ Articles Arctic Greenland Frontiers in Microbiology 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sulfate-reducing microorganisms marine sediment glacial impact deep biosphere microbial community assembly Greenland Microbiology QR1-502 |
spellingShingle |
sulfate-reducing microorganisms marine sediment glacial impact deep biosphere microbial community assembly Greenland Microbiology QR1-502 Claus Pelikan Marion Jaussi Kenneth Wasmund Marit-Solveig Seidenkrantz Christof Pearce Zou Zou Anna Kuzyk Craig W. Herbold Hans Røy Kasper Urup Kjeldsen Alexander Loy Glacial Runoff Promotes Deep Burial of Sulfur Cycling-Associated Microorganisms in Marine Sediments |
topic_facet |
sulfate-reducing microorganisms marine sediment glacial impact deep biosphere microbial community assembly Greenland Microbiology QR1-502 |
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 ... |
format |
Article in Journal/Newspaper |
author |
Claus Pelikan Marion Jaussi Kenneth Wasmund Marit-Solveig Seidenkrantz Christof Pearce Zou Zou Anna Kuzyk Craig W. Herbold Hans Røy Kasper Urup Kjeldsen Alexander Loy |
author_facet |
Claus Pelikan Marion Jaussi Kenneth Wasmund Marit-Solveig Seidenkrantz Christof Pearce Zou Zou Anna Kuzyk Craig W. Herbold Hans Røy Kasper Urup Kjeldsen Alexander Loy |
author_sort |
Claus Pelikan |
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 |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmicb.2019.02558 https://doaj.org/article/3ee56bdbf77747b7a3611151b8e75494 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic glacier Godthåbsfjord Greenland |
genre_facet |
Arctic glacier Godthåbsfjord Greenland |
op_source |
Frontiers in Microbiology, Vol 10 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmicb.2019.02558/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2019.02558 https://doaj.org/article/3ee56bdbf77747b7a3611151b8e75494 |
op_doi |
https://doi.org/10.3389/fmicb.2019.02558 |
container_title |
Frontiers in Microbiology |
container_volume |
10 |
_version_ |
1766345301931589632 |