Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient
Special issue on High environmental variability and steep biological gradients in the waters off the northern Antarctic Peninsula.-- 10 pages, 5 figures To assess whether sea floor sediment reflects the characteristics of the upper water column, organic carbon (OC) and biogenic silica (bSi) were mea...
Published in: | Polar Biology |
---|---|
Main Author: | |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Springer
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/133291 https://doi.org/10.1007/s00300-015-1833-6 https://doi.org/10.13039/501100003329 |
id |
ftcsic:oai:digital.csic.es:10261/133291 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/133291 2024-02-11T09:57:29+01:00 Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient Isla, Enrique Ministerio de Economía y Competitividad (España) 2016-05 http://hdl.handle.net/10261/133291 https://doi.org/10.1007/s00300-015-1833-6 https://doi.org/10.13039/501100003329 unknown Springer https://dx.doi.org/10.1007/s00300-015-1833-6 Sí doi:10.1007/s00300-015-1833-6 issn: 0722-4060 e-issn: 1432-2056 Polar Biology 39(5): 819-828 (2016) http://hdl.handle.net/10261/133291 http://dx.doi.org/10.13039/501100003329 none Antarctic Peninsula Pelagic-benthic coupling Biogenic silica Organic carbon Sediment artículo http://purl.org/coar/resource_type/c_6501 2016 ftcsic https://doi.org/10.1007/s00300-015-1833-610.13039/501100003329 2024-01-16T10:15:48Z Special issue on High environmental variability and steep biological gradients in the waters off the northern Antarctic Peninsula.-- 10 pages, 5 figures To assess whether sea floor sediment reflects the characteristics of the upper water column, organic carbon (OC) and biogenic silica (bSi) were measured in seventeen 5-cm-long sediment cores recovered within a climatic gradient from the northwestern Weddell Sea (WS) to the Drake Passage (DP) across the Bransfield Strait (BS). Climate settings in the study area vary from dry and cold (polar) conditions with seasonal sea ice coverage in the WS to a more humid and warm (oceanic) environment where no seasonal sea ice develops in the DP, with the BS as transitional zone undergoing seasonal sea ice coverage. OC varied between 0.2 and 1.7 % and represented more than 90 % of the total carbon, and bSi varied between 2 and 13 %. The profiles of both variables along the sediment cores suggested that the surface mixed layer is at least 5 cm thick. The inventories of the upper 5 cm of the sediment column were calculated for both variables. Regional averages were significantly lower for OC in DP samples and higher for bSi in the BS. These results suggested relatively high bSi export to the seabed in the BS, higher degradation for OC in the DP and lower bSi export from the euphotic zone in the WS. The observations made evident that the biogenic matter contents in the sediment not necessarily replicate their production characteristics at the upper ocean even across strong climatic gradients. The results may provide a useful baseline for paleo-reconstructions in a rapidly changing environment The study was funded by the project ECOWED (CTM2012-39350-C02-01) of the Spanish Ministry of Economy and Competitiveness Peer Reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Polar Biology Sea ice Weddell Sea Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Bransfield Strait Drake Passage The Antarctic Weddell Weddell Sea Polar Biology 39 5 819 828 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Antarctic Peninsula Pelagic-benthic coupling Biogenic silica Organic carbon Sediment |
spellingShingle |
Antarctic Peninsula Pelagic-benthic coupling Biogenic silica Organic carbon Sediment Isla, Enrique Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient |
topic_facet |
Antarctic Peninsula Pelagic-benthic coupling Biogenic silica Organic carbon Sediment |
description |
Special issue on High environmental variability and steep biological gradients in the waters off the northern Antarctic Peninsula.-- 10 pages, 5 figures To assess whether sea floor sediment reflects the characteristics of the upper water column, organic carbon (OC) and biogenic silica (bSi) were measured in seventeen 5-cm-long sediment cores recovered within a climatic gradient from the northwestern Weddell Sea (WS) to the Drake Passage (DP) across the Bransfield Strait (BS). Climate settings in the study area vary from dry and cold (polar) conditions with seasonal sea ice coverage in the WS to a more humid and warm (oceanic) environment where no seasonal sea ice develops in the DP, with the BS as transitional zone undergoing seasonal sea ice coverage. OC varied between 0.2 and 1.7 % and represented more than 90 % of the total carbon, and bSi varied between 2 and 13 %. The profiles of both variables along the sediment cores suggested that the surface mixed layer is at least 5 cm thick. The inventories of the upper 5 cm of the sediment column were calculated for both variables. Regional averages were significantly lower for OC in DP samples and higher for bSi in the BS. These results suggested relatively high bSi export to the seabed in the BS, higher degradation for OC in the DP and lower bSi export from the euphotic zone in the WS. The observations made evident that the biogenic matter contents in the sediment not necessarily replicate their production characteristics at the upper ocean even across strong climatic gradients. The results may provide a useful baseline for paleo-reconstructions in a rapidly changing environment The study was funded by the project ECOWED (CTM2012-39350-C02-01) of the Spanish Ministry of Economy and Competitiveness Peer Reviewed |
author2 |
Ministerio de Economía y Competitividad (España) |
format |
Article in Journal/Newspaper |
author |
Isla, Enrique |
author_facet |
Isla, Enrique |
author_sort |
Isla, Enrique |
title |
Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient |
title_short |
Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient |
title_full |
Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient |
title_fullStr |
Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient |
title_full_unstemmed |
Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient |
title_sort |
organic carbon and biogenic silica in marine sediments in the vicinities of the antarctic peninsula: spatial patterns across a climatic gradient |
publisher |
Springer |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/133291 https://doi.org/10.1007/s00300-015-1833-6 https://doi.org/10.13039/501100003329 |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait Drake Passage The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait Drake Passage The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Polar Biology Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Polar Biology Sea ice Weddell Sea |
op_relation |
https://dx.doi.org/10.1007/s00300-015-1833-6 Sí doi:10.1007/s00300-015-1833-6 issn: 0722-4060 e-issn: 1432-2056 Polar Biology 39(5): 819-828 (2016) http://hdl.handle.net/10261/133291 http://dx.doi.org/10.13039/501100003329 |
op_rights |
none |
op_doi |
https://doi.org/10.1007/s00300-015-1833-610.13039/501100003329 |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
5 |
container_start_page |
819 |
op_container_end_page |
828 |
_version_ |
1790609776960339968 |