Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands
Microbial activity in a marine sediment in Factory Cove, Signy Island (60°43′S, 45°38′W), South Orkney Islands in the maritime Antarctic was examined during December 1987 and January 1988. The sediment was bioturbated by a dense amphipod population in the surface layer but oxygen penetrated to a dep...
Published in: | Estuarine, Coastal and Shelf Science |
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1989
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Online Access: | http://nora.nerc.ac.uk/id/eprint/521279/ https://doi.org/10.1016/0272-7714(89)90026-7 |
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ftnerc:oai:nora.nerc.ac.uk:521279 2023-05-15T13:49:35+02:00 Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands Nedwell, D.B. 1989-05 http://nora.nerc.ac.uk/id/eprint/521279/ https://doi.org/10.1016/0272-7714(89)90026-7 unknown Elsevier Nedwell, D.B. 1989 Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands. Estuarine, Coastal and Shelf Science, 28 (5). 507-516. https://doi.org/10.1016/0272-7714(89)90026-7 <https://doi.org/10.1016/0272-7714(89)90026-7> Publication - Article PeerReviewed 1989 ftnerc https://doi.org/10.1016/0272-7714(89)90026-7 2023-02-04T19:47:13Z Microbial activity in a marine sediment in Factory Cove, Signy Island (60°43′S, 45°38′W), South Orkney Islands in the maritime Antarctic was examined during December 1987 and January 1988. The sediment was bioturbated by a dense amphipod population in the surface layer but oxygen penetrated to a depth of only 1·7 mm. The top 1 cm was light coloured and contained negligible concentrations of acid-volatile sulphides. Below 1 cm the sediment was black and contained abundant sulphides. Sulphate reduction rates averaged 6·87 × 10−1 μmol sulphate cm−2d−1 over the 0–15 cm horizon, equivalent to 1·38 μmol organic carbon oxidized cm−2d−1. Of the sulphate reduced, 60% was to tin-reducible products (including pyrite) and 40% to acid-volatile sulphides. Annual sulphate reduction was at least 250 μmol sulphate cm−2y−1. The sea water temperature varied only between −1·8−1 °C, but the optimum temperature for sulphate reduction was 21 °C. Oxygen uptake by the benthos averaged 5·33 μmol oxygen cm−2d−1, equivalent to 5·33 μmol organic carbon oxidized cm−2d−1. Aerobic respiration accounted for 79% of the organic carbon mineralization and sulphate reduction for 21%. Article in Journal/Newspaper Antarc* Antarctic Signy Island South Orkney Islands Natural Environment Research Council: NERC Open Research Archive Antarctic South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Factory Cove ENVELOPE(-45.597,-45.597,-60.708,-60.708) Estuarine, Coastal and Shelf Science 28 5 507 516 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Microbial activity in a marine sediment in Factory Cove, Signy Island (60°43′S, 45°38′W), South Orkney Islands in the maritime Antarctic was examined during December 1987 and January 1988. The sediment was bioturbated by a dense amphipod population in the surface layer but oxygen penetrated to a depth of only 1·7 mm. The top 1 cm was light coloured and contained negligible concentrations of acid-volatile sulphides. Below 1 cm the sediment was black and contained abundant sulphides. Sulphate reduction rates averaged 6·87 × 10−1 μmol sulphate cm−2d−1 over the 0–15 cm horizon, equivalent to 1·38 μmol organic carbon oxidized cm−2d−1. Of the sulphate reduced, 60% was to tin-reducible products (including pyrite) and 40% to acid-volatile sulphides. Annual sulphate reduction was at least 250 μmol sulphate cm−2y−1. The sea water temperature varied only between −1·8−1 °C, but the optimum temperature for sulphate reduction was 21 °C. Oxygen uptake by the benthos averaged 5·33 μmol oxygen cm−2d−1, equivalent to 5·33 μmol organic carbon oxidized cm−2d−1. Aerobic respiration accounted for 79% of the organic carbon mineralization and sulphate reduction for 21%. |
format |
Article in Journal/Newspaper |
author |
Nedwell, D.B. |
spellingShingle |
Nedwell, D.B. Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands |
author_facet |
Nedwell, D.B. |
author_sort |
Nedwell, D.B. |
title |
Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands |
title_short |
Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands |
title_full |
Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands |
title_fullStr |
Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands |
title_full_unstemmed |
Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands |
title_sort |
benthic microbial activity in an antarctic coastal sediment at signy island, south orkney islands |
publisher |
Elsevier |
publishDate |
1989 |
url |
http://nora.nerc.ac.uk/id/eprint/521279/ https://doi.org/10.1016/0272-7714(89)90026-7 |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-45.597,-45.597,-60.708,-60.708) |
geographic |
Antarctic South Orkney Islands Signy Island Factory Cove |
geographic_facet |
Antarctic South Orkney Islands Signy Island Factory Cove |
genre |
Antarc* Antarctic Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctic Signy Island South Orkney Islands |
op_relation |
Nedwell, D.B. 1989 Benthic microbial activity in an Antarctic coastal sediment at Signy Island, South Orkney Islands. Estuarine, Coastal and Shelf Science, 28 (5). 507-516. https://doi.org/10.1016/0272-7714(89)90026-7 <https://doi.org/10.1016/0272-7714(89)90026-7> |
op_doi |
https://doi.org/10.1016/0272-7714(89)90026-7 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
28 |
container_issue |
5 |
container_start_page |
507 |
op_container_end_page |
516 |
_version_ |
1766251823055765504 |