Organic carbon and biogenic silica in marine sediments in the vicinities of the Antarctic Peninsula: spatial patterns across a climatic gradient

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

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Bibliographic Details
Main Author: Isla, Enrique
Other Authors: Ministerio de Economía y Competitividad (España)
Format: artículo biblioteca
Published: Springer 2016-05
Subjects:Antarctic Peninsula, Pelagic-benthic coupling, Biogenic silica, Organic carbon, Sediment,
Online Access:http://hdl.handle.net/10261/133291
http://dx.doi.org/10.13039/501100003329
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spelling dig-icm-es-10261-1332912019-03-07T11:16:10Z 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) Antarctic Peninsula Pelagic-benthic coupling Biogenic silica Organic carbon Sediment 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 2016-06-10T09:11:23Z 2016-06-10T09:11:23Z 2016-05 2016-06-10T09:11:24Z artículo http://purl.org/coar/resource_type/c_6501 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 10.1007/s00300-015-1833-6 http://dx.doi.org/10.13039/501100003329 https://dx.doi.org/10.1007/s00300-015-1833-6 Sí none Springer
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic Antarctic Peninsula
Pelagic-benthic coupling
Biogenic silica
Organic carbon
Sediment
Antarctic Peninsula
Pelagic-benthic coupling
Biogenic silica
Organic carbon
Sediment
spellingShingle Antarctic Peninsula
Pelagic-benthic coupling
Biogenic silica
Organic carbon
Sediment
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
description Special issue on High environmental variability and steep biological gradients in the waters off the northern Antarctic Peninsula.-- 10 pages, 5 figures
author2 Ministerio de Economía y Competitividad (España)
author_facet Ministerio de Economía y Competitividad (España)
Isla, Enrique
format artículo
topic_facet Antarctic Peninsula
Pelagic-benthic coupling
Biogenic silica
Organic carbon
Sediment
author 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 2016-05
url http://hdl.handle.net/10261/133291
http://dx.doi.org/10.13039/501100003329
work_keys_str_mv AT islaenrique organiccarbonandbiogenicsilicainmarinesedimentsinthevicinitiesoftheantarcticpeninsulaspatialpatternsacrossaclimaticgradient
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