The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica
At Hook Ridge hydrothermal vent, a new species of Sclerolinum (Monilifera, Siboglinidae) was found at a water depth of 1,045 m. On the basis of investigations of multicores and gravity cores, the species habitat is characterized. Sclerolinum does not occur in sediments that are most strongly influen...
Published in: | Limnology and Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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ASLO (Association for the Sciences of Limnology and Oceanography)
2005
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Online Access: | https://oceanrep.geomar.de/id/eprint/5047/ https://oceanrep.geomar.de/id/eprint/5047/1/0598-1.pdf https://doi.org/10.4319/lo.2005.50.2.0598 |
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ftoceanrep:oai:oceanrep.geomar.de:5047 2023-05-15T14:01:00+02:00 The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica Sahling, Heiko Wallmann, Klaus J. G. Dählmann, A. Schmaljohann, Rolf Petersen, Sven 2005 text https://oceanrep.geomar.de/id/eprint/5047/ https://oceanrep.geomar.de/id/eprint/5047/1/0598-1.pdf https://doi.org/10.4319/lo.2005.50.2.0598 en eng ASLO (Association for the Sciences of Limnology and Oceanography) https://oceanrep.geomar.de/id/eprint/5047/1/0598-1.pdf Sahling, H., Wallmann, K. J. G. , Dählmann, A., Schmaljohann, R. and Petersen, S. (2005) The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica. Limnology and Oceanography, 50 (2). pp. 598-606. DOI 10.4319/lo.2005.50.2.0598 <https://doi.org/10.4319/lo.2005.50.2.0598>. doi:10.4319/lo.2005.50.2.0598 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2005 ftoceanrep https://doi.org/10.4319/lo.2005.50.2.0598 2023-04-07T14:50:27Z At Hook Ridge hydrothermal vent, a new species of Sclerolinum (Monilifera, Siboglinidae) was found at a water depth of 1,045 m. On the basis of investigations of multicores and gravity cores, the species habitat is characterized. Sclerolinum does not occur in sediments that are most strongly influenced by hydrothermal fluids, probably because of high temperature (up to 49°C) and precipitation of siliceous crusts. About 800 individuals m-2 occur in sediments that are only weakly exposed to hydrothermal flow and have the following characteristics: 20°C (15 cm sediment depth) to 21.5°C (bottom water), 18-40 cm yr-1 advection rates, pH 5.5, <25 µmol L-1 methane, <170 µmol L-1 sulfide, and <0.0054 mol m-2 yr-1 sulfide flux. Comparison with geochemical data from other reducing sediments indicates that the two groups of Siboglinidae, Monilifera and Frenulata, occur in sediments with low sulfide concentration and flux. In contrast, sulfurbased chemosynthetic organisms that typically occur at hydrothermal vents and cold seeps (e.g., Vestimentifera, vesicomyid clams, and bacterial mats) occur in sediments with higher sulfide availability; threshold values are around 500 µmol L-1 sulfide and 0.1 mol m-2 yr-1 sulfide fluxes. We did not find typical hydrothermal vent species at Hook Ridge hydrothermal vent, which might be explained by the unfavorable physicochemical habitat: At sites inhabited by Sclerolinum, sulfide availability appears to be too low, whereas at sites with higher sulfide availability, the temperatures might be too high, siliceous crust precipitation could preclude their occurrence, or both. Article in Journal/Newspaper Antarc* Antarctica Bransfield Strait OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Bransfield Strait Hook Ridge ENVELOPE(-143.667,-143.667,51.500,51.500) Limnology and Oceanography 50 2 598 606 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
At Hook Ridge hydrothermal vent, a new species of Sclerolinum (Monilifera, Siboglinidae) was found at a water depth of 1,045 m. On the basis of investigations of multicores and gravity cores, the species habitat is characterized. Sclerolinum does not occur in sediments that are most strongly influenced by hydrothermal fluids, probably because of high temperature (up to 49°C) and precipitation of siliceous crusts. About 800 individuals m-2 occur in sediments that are only weakly exposed to hydrothermal flow and have the following characteristics: 20°C (15 cm sediment depth) to 21.5°C (bottom water), 18-40 cm yr-1 advection rates, pH 5.5, <25 µmol L-1 methane, <170 µmol L-1 sulfide, and <0.0054 mol m-2 yr-1 sulfide flux. Comparison with geochemical data from other reducing sediments indicates that the two groups of Siboglinidae, Monilifera and Frenulata, occur in sediments with low sulfide concentration and flux. In contrast, sulfurbased chemosynthetic organisms that typically occur at hydrothermal vents and cold seeps (e.g., Vestimentifera, vesicomyid clams, and bacterial mats) occur in sediments with higher sulfide availability; threshold values are around 500 µmol L-1 sulfide and 0.1 mol m-2 yr-1 sulfide fluxes. We did not find typical hydrothermal vent species at Hook Ridge hydrothermal vent, which might be explained by the unfavorable physicochemical habitat: At sites inhabited by Sclerolinum, sulfide availability appears to be too low, whereas at sites with higher sulfide availability, the temperatures might be too high, siliceous crust precipitation could preclude their occurrence, or both. |
format |
Article in Journal/Newspaper |
author |
Sahling, Heiko Wallmann, Klaus J. G. Dählmann, A. Schmaljohann, Rolf Petersen, Sven |
spellingShingle |
Sahling, Heiko Wallmann, Klaus J. G. Dählmann, A. Schmaljohann, Rolf Petersen, Sven The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica |
author_facet |
Sahling, Heiko Wallmann, Klaus J. G. Dählmann, A. Schmaljohann, Rolf Petersen, Sven |
author_sort |
Sahling, Heiko |
title |
The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica |
title_short |
The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica |
title_full |
The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica |
title_fullStr |
The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica |
title_full_unstemmed |
The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica |
title_sort |
physicochemical habitat of sclerolinum sp., at hook ridge hydrothermal vent, bransfield strait, antarctica |
publisher |
ASLO (Association for the Sciences of Limnology and Oceanography) |
publishDate |
2005 |
url |
https://oceanrep.geomar.de/id/eprint/5047/ https://oceanrep.geomar.de/id/eprint/5047/1/0598-1.pdf https://doi.org/10.4319/lo.2005.50.2.0598 |
long_lat |
ENVELOPE(-143.667,-143.667,51.500,51.500) |
geographic |
Bransfield Strait Hook Ridge |
geographic_facet |
Bransfield Strait Hook Ridge |
genre |
Antarc* Antarctica Bransfield Strait |
genre_facet |
Antarc* Antarctica Bransfield Strait |
op_relation |
https://oceanrep.geomar.de/id/eprint/5047/1/0598-1.pdf Sahling, H., Wallmann, K. J. G. , Dählmann, A., Schmaljohann, R. and Petersen, S. (2005) The physicochemical habitat of Sclerolinum sp., at Hook Ridge hydrothermal vent, Bransfield Strait, Antarctica. Limnology and Oceanography, 50 (2). pp. 598-606. DOI 10.4319/lo.2005.50.2.0598 <https://doi.org/10.4319/lo.2005.50.2.0598>. doi:10.4319/lo.2005.50.2.0598 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.4319/lo.2005.50.2.0598 |
container_title |
Limnology and Oceanography |
container_volume |
50 |
container_issue |
2 |
container_start_page |
598 |
op_container_end_page |
606 |
_version_ |
1766270442888232960 |