Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea)
The penetration of oxygen into silty fjord sediments from northern Norway and SW Svalbard was studied at 6 sites during a research cruise to the northern Barents Sea. Profiles of oxygen were measured by microelectrodes on retrieved sediment cores in a thermostated flow aquarium and used to develop c...
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Online Access: | https://pure.uhi.ac.uk/en/publications/5e87892d-00af-450c-9fd9-6f5bdb709b68 https://doi.org/10.3354/meps292085 |
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ftuhipublicatio:oai:pure.atira.dk:publications/5e87892d-00af-450c-9fd9-6f5bdb709b68 2024-09-15T17:41:11+00:00 Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) Jorgensen, BB Glud, Ronnie Holby, O 2005 https://pure.uhi.ac.uk/en/publications/5e87892d-00af-450c-9fd9-6f5bdb709b68 https://doi.org/10.3354/meps292085 eng eng https://pure.uhi.ac.uk/en/publications/5e87892d-00af-450c-9fd9-6f5bdb709b68 info:eu-repo/semantics/restrictedAccess Jorgensen , BB , Glud , R & Holby , O 2005 , ' Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) ' , MAR ECOL-PROG SER , no. 2 , pp. 85-95 . https://doi.org/10.3354/meps292085 RESPIRATION TEMPERATURE-DEPENDENCE Marine & Freshwater Biology Oceanography MINERALIZATION GREENLAND Ecology FLUXES CARBON YOUNG SOUND ANTARCTIC COASTAL ENVIRONMENT BENTHIC COMMUNITY MARINE SEDIMENT article 2005 ftuhipublicatio https://doi.org/10.3354/meps292085 2024-06-24T23:48:36Z The penetration of oxygen into silty fjord sediments from northern Norway and SW Svalbard was studied at 6 sites during a research cruise to the northern Barents Sea. Profiles of oxygen were measured by microelectrodes on retrieved sediment cores in a thermostated flow aquarium and used to develop composite, 2-dimensional images of the oxygen distribution. Oxygen penetrations ranged from 3 to 11 min with a mean depth of 6 to 8 mm. The mean diffusive oxygen uptake rates across the sediment-water interface ranged from 2.8 to 13.4 mmol O-2 m(-2) d(-1). The diffusive flux accounted for 60 to 95% of the total oxygen uptake of the sediments as measured in situ by a flux chamber lander. The sediments were densely populated by fauna such as tube-dwelling polychaetes. Inhabited and relict tubes of 1 to 2.5 mm diameter reached densities of up to 1 cm(-2), and about 15 % of all oxygen microprofiles showed evidence of advective oxygen flow through the tubes. Based on oxygen microprofiles and data on burrow geometry and density, burrows extending down into the anoxic sediment extended the oxic sediment volume by 2 to 10 % and thereby enhanced the oxygen flux. Anoxic microenvironments were not detected, but during inactivity of polychaetes their tubes became depleted in oxygen relative to the surrounding sediment. Article in Journal/Newspaper Antarc* Antarctic Arctic Barents Sea Greenland Northern Norway Svalbard University of the Highlands and Islands: Research Database of UHI Marine Ecology Progress Series 292 85 95 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
RESPIRATION TEMPERATURE-DEPENDENCE Marine & Freshwater Biology Oceanography MINERALIZATION GREENLAND Ecology FLUXES CARBON YOUNG SOUND ANTARCTIC COASTAL ENVIRONMENT BENTHIC COMMUNITY MARINE SEDIMENT |
spellingShingle |
RESPIRATION TEMPERATURE-DEPENDENCE Marine & Freshwater Biology Oceanography MINERALIZATION GREENLAND Ecology FLUXES CARBON YOUNG SOUND ANTARCTIC COASTAL ENVIRONMENT BENTHIC COMMUNITY MARINE SEDIMENT Jorgensen, BB Glud, Ronnie Holby, O Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) |
topic_facet |
RESPIRATION TEMPERATURE-DEPENDENCE Marine & Freshwater Biology Oceanography MINERALIZATION GREENLAND Ecology FLUXES CARBON YOUNG SOUND ANTARCTIC COASTAL ENVIRONMENT BENTHIC COMMUNITY MARINE SEDIMENT |
description |
The penetration of oxygen into silty fjord sediments from northern Norway and SW Svalbard was studied at 6 sites during a research cruise to the northern Barents Sea. Profiles of oxygen were measured by microelectrodes on retrieved sediment cores in a thermostated flow aquarium and used to develop composite, 2-dimensional images of the oxygen distribution. Oxygen penetrations ranged from 3 to 11 min with a mean depth of 6 to 8 mm. The mean diffusive oxygen uptake rates across the sediment-water interface ranged from 2.8 to 13.4 mmol O-2 m(-2) d(-1). The diffusive flux accounted for 60 to 95% of the total oxygen uptake of the sediments as measured in situ by a flux chamber lander. The sediments were densely populated by fauna such as tube-dwelling polychaetes. Inhabited and relict tubes of 1 to 2.5 mm diameter reached densities of up to 1 cm(-2), and about 15 % of all oxygen microprofiles showed evidence of advective oxygen flow through the tubes. Based on oxygen microprofiles and data on burrow geometry and density, burrows extending down into the anoxic sediment extended the oxic sediment volume by 2 to 10 % and thereby enhanced the oxygen flux. Anoxic microenvironments were not detected, but during inactivity of polychaetes their tubes became depleted in oxygen relative to the surrounding sediment. |
format |
Article in Journal/Newspaper |
author |
Jorgensen, BB Glud, Ronnie Holby, O |
author_facet |
Jorgensen, BB Glud, Ronnie Holby, O |
author_sort |
Jorgensen, BB |
title |
Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) |
title_short |
Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) |
title_full |
Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) |
title_fullStr |
Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) |
title_full_unstemmed |
Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) |
title_sort |
oxygen distribution and bioirrigation in arctic fjord sediments (svalbard, barents sea) |
publishDate |
2005 |
url |
https://pure.uhi.ac.uk/en/publications/5e87892d-00af-450c-9fd9-6f5bdb709b68 https://doi.org/10.3354/meps292085 |
genre |
Antarc* Antarctic Arctic Barents Sea Greenland Northern Norway Svalbard |
genre_facet |
Antarc* Antarctic Arctic Barents Sea Greenland Northern Norway Svalbard |
op_source |
Jorgensen , BB , Glud , R & Holby , O 2005 , ' Oxygen distribution and bioirrigation in Arctic fjord sediments (Svalbard, Barents Sea) ' , MAR ECOL-PROG SER , no. 2 , pp. 85-95 . https://doi.org/10.3354/meps292085 |
op_relation |
https://pure.uhi.ac.uk/en/publications/5e87892d-00af-450c-9fd9-6f5bdb709b68 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3354/meps292085 |
container_title |
Marine Ecology Progress Series |
container_volume |
292 |
container_start_page |
85 |
op_container_end_page |
95 |
_version_ |
1810487321794969600 |