Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords
Fjord ecosystems of the high Arctic are distinct from fjords of temperate latitudes due to the influence of glaciers, icebergs, sea ice, and the permanently low temperatures. The sediment microbiology and biogeochemical processes were analyzed during an international research program with multiple f...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/da/publications/biogeochemistry-and-microbiology-of-high-arctic-marine-sediment-ecosystemscase-study-of-svalbard-fjords(e7c61d86-df37-48a4-a585-5d92c4ce41a6).html https://doi.org/10.1002/lno.11551 http://www.scopus.com/inward/record.url?scp=85089201507&partnerID=8YFLogxK |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/e7c61d86-df37-48a4-a585-5d92c4ce41a6 |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/e7c61d86-df37-48a4-a585-5d92c4ce41a6 2023-12-31T10:01:53+01:00 Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords Jorgensen, Bo Barker Laufer, Katja Michaud, Alexander B. Wehrmann, Laura M. 2021-01 https://pure.au.dk/portal/da/publications/biogeochemistry-and-microbiology-of-high-arctic-marine-sediment-ecosystemscase-study-of-svalbard-fjords(e7c61d86-df37-48a4-a585-5d92c4ce41a6).html https://doi.org/10.1002/lno.11551 http://www.scopus.com/inward/record.url?scp=85089201507&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/da/publications/biogeochemistry-and-microbiology-of-high-arctic-marine-sediment-ecosystemscase-study-of-svalbard-fjords(e7c61d86-df37-48a4-a585-5d92c4ce41a6).html info:eu-repo/semantics/restrictedAccess Jorgensen , B B , Laufer , K , Michaud , A B & Wehrmann , L M 2021 , ' Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords ' , Limnology and Oceanography , vol. 66 , no. S1 , pp. S273-S292 . https://doi.org/10.1002/lno.11551 SULFATE-REDUCING BACTERIA FILAMENTOUS SULFUR BACTERIA ORGANIC-CARBON BURIAL SP NOV TEMPERATURE-DEPENDENCE COMMUNITY STRUCTURE DESULFOTALEA-PSYCHROPHILA THERMOPHILIC BACTERIA TIDEWATER GLACIERS FE(III) REDUCTION article 2021 ftuniaarhuspubl https://doi.org/10.1002/lno.11551 2023-12-07T00:04:13Z Fjord ecosystems of the high Arctic are distinct from fjords of temperate latitudes due to the influence of glaciers, icebergs, sea ice, and the permanently low temperatures. The sediment microbiology and biogeochemical processes were analyzed during an international research program with multiple field studies in Svalbard, situated between the Barents Sea and the Arctic Ocean. We here describe the physical and geochemical setting and the predominant microbiological processes in several fjords. Physiological studies of sediments and pure cultures show how the predominantly psychrophilic bacteria are adapted to the near-zero temperature. The microbial communities include bacteria responsible for organic matter hydrolytic degradation, fermentation, and terminal oxidation to CO2. These processes drive the cycling of carbon, sulfur, iron, and manganese. The balance between the dominant sediment microbial processes changes along transects out through the fjords, reflecting the varying impact of the glacier-derived rock flour, rich in metal oxides at the head, and the plankton-derived, labile, marine organic matter at the mouth. Due to accelerated warming of Arctic ecosystems, glaciers are retreating with impacts on the physical, chemical, and biological functioning of the fjord sediment ecosystems. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea glacier Iceberg* Sea ice Svalbard Tidewater Aarhus University: Research Limnology and Oceanography 66 S1 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
SULFATE-REDUCING BACTERIA FILAMENTOUS SULFUR BACTERIA ORGANIC-CARBON BURIAL SP NOV TEMPERATURE-DEPENDENCE COMMUNITY STRUCTURE DESULFOTALEA-PSYCHROPHILA THERMOPHILIC BACTERIA TIDEWATER GLACIERS FE(III) REDUCTION |
spellingShingle |
SULFATE-REDUCING BACTERIA FILAMENTOUS SULFUR BACTERIA ORGANIC-CARBON BURIAL SP NOV TEMPERATURE-DEPENDENCE COMMUNITY STRUCTURE DESULFOTALEA-PSYCHROPHILA THERMOPHILIC BACTERIA TIDEWATER GLACIERS FE(III) REDUCTION Jorgensen, Bo Barker Laufer, Katja Michaud, Alexander B. Wehrmann, Laura M. Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords |
topic_facet |
SULFATE-REDUCING BACTERIA FILAMENTOUS SULFUR BACTERIA ORGANIC-CARBON BURIAL SP NOV TEMPERATURE-DEPENDENCE COMMUNITY STRUCTURE DESULFOTALEA-PSYCHROPHILA THERMOPHILIC BACTERIA TIDEWATER GLACIERS FE(III) REDUCTION |
description |
Fjord ecosystems of the high Arctic are distinct from fjords of temperate latitudes due to the influence of glaciers, icebergs, sea ice, and the permanently low temperatures. The sediment microbiology and biogeochemical processes were analyzed during an international research program with multiple field studies in Svalbard, situated between the Barents Sea and the Arctic Ocean. We here describe the physical and geochemical setting and the predominant microbiological processes in several fjords. Physiological studies of sediments and pure cultures show how the predominantly psychrophilic bacteria are adapted to the near-zero temperature. The microbial communities include bacteria responsible for organic matter hydrolytic degradation, fermentation, and terminal oxidation to CO2. These processes drive the cycling of carbon, sulfur, iron, and manganese. The balance between the dominant sediment microbial processes changes along transects out through the fjords, reflecting the varying impact of the glacier-derived rock flour, rich in metal oxides at the head, and the plankton-derived, labile, marine organic matter at the mouth. Due to accelerated warming of Arctic ecosystems, glaciers are retreating with impacts on the physical, chemical, and biological functioning of the fjord sediment ecosystems. |
format |
Article in Journal/Newspaper |
author |
Jorgensen, Bo Barker Laufer, Katja Michaud, Alexander B. Wehrmann, Laura M. |
author_facet |
Jorgensen, Bo Barker Laufer, Katja Michaud, Alexander B. Wehrmann, Laura M. |
author_sort |
Jorgensen, Bo Barker |
title |
Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords |
title_short |
Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords |
title_full |
Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords |
title_fullStr |
Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords |
title_full_unstemmed |
Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords |
title_sort |
biogeochemistry and microbiology of high arctic marine sediment ecosystems-case study of svalbard fjords |
publishDate |
2021 |
url |
https://pure.au.dk/portal/da/publications/biogeochemistry-and-microbiology-of-high-arctic-marine-sediment-ecosystemscase-study-of-svalbard-fjords(e7c61d86-df37-48a4-a585-5d92c4ce41a6).html https://doi.org/10.1002/lno.11551 http://www.scopus.com/inward/record.url?scp=85089201507&partnerID=8YFLogxK |
genre |
Arctic Arctic Arctic Ocean Barents Sea glacier Iceberg* Sea ice Svalbard Tidewater |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea glacier Iceberg* Sea ice Svalbard Tidewater |
op_source |
Jorgensen , B B , Laufer , K , Michaud , A B & Wehrmann , L M 2021 , ' Biogeochemistry and microbiology of high Arctic marine sediment ecosystems-Case study of Svalbard fjords ' , Limnology and Oceanography , vol. 66 , no. S1 , pp. S273-S292 . https://doi.org/10.1002/lno.11551 |
op_relation |
https://pure.au.dk/portal/da/publications/biogeochemistry-and-microbiology-of-high-arctic-marine-sediment-ecosystemscase-study-of-svalbard-fjords(e7c61d86-df37-48a4-a585-5d92c4ce41a6).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/lno.11551 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
S1 |
_version_ |
1786807513634570240 |