Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP
We present a high resolution, multiproxy study of the relationship between pelagic and benthic environments of a coastal upwelling system in the subtropical NE Atlantic Ocean. Marine sediments corresponding to late MIS3 to the Holocene in the radiocarbon dated core GeoB7926, retrieved off Mauritania...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2014
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Online Access: | https://research.vu.nl/en/publications/437dc167-3989-49a8-877c-2891ef68da14 https://doi.org/10.1016/j.quascirev.2014.04.027 https://hdl.handle.net/1871.1/437dc167-3989-49a8-877c-2891ef68da14 http://www.scopus.com/inward/record.url?scp=85027922070&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85027922070&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/437dc167-3989-49a8-877c-2891ef68da14 2024-05-19T07:45:51+00:00 Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP McKay, C. L. Filipsson, H. L. Romero, O. E. Stuut, J. B.W. Donner, B. 2014-12-15 https://research.vu.nl/en/publications/437dc167-3989-49a8-877c-2891ef68da14 https://doi.org/10.1016/j.quascirev.2014.04.027 https://hdl.handle.net/1871.1/437dc167-3989-49a8-877c-2891ef68da14 http://www.scopus.com/inward/record.url?scp=85027922070&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85027922070&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/437dc167-3989-49a8-877c-2891ef68da14 info:eu-repo/semantics/restrictedAccess McKay , C L , Filipsson , H L , Romero , O E , Stuut , J B W & Donner , B 2014 , ' Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP ' , Quaternary Science Reviews , vol. 106 , pp. 299-315 . https://doi.org/10.1016/j.quascirev.2014.04.027 Benthic foraminifera Palaeoproductivity Pelagic-benthic Subtropical NE Atlantic Upwelling /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2014 ftvuamstcris https://doi.org/10.1016/j.quascirev.2014.04.027 2024-04-30T03:09:11Z We present a high resolution, multiproxy study of the relationship between pelagic and benthic environments of a coastal upwelling system in the subtropical NE Atlantic Ocean. Marine sediments corresponding to late MIS3 to the Holocene in the radiocarbon dated core GeoB7926, retrieved off Mauritania (21°N) were analysed to reconstruct productivity in surface waters and its linkage to deep waters during the last 35kaBP. High latitude cold events and changes in atmospheric and oceanographic dynamics influenced upwelling intensity over this time period. Subsequently, this caused changes in primary productivity off this low-latitude coastal upwelling locality. The benthic foraminiferal fauna displays four main community shifts corresponding to fundamental climatic events, first of all during late MIS3 (35-28kaBP), secondly from 28 to 19kaBP (including Heinrich event 2 and the LGM), thirdly within Heinrich event 1, the Bølling Allerød and the Younger Dryas (18-11.5kaBP) and finally during the Holocene (11.5-0kaBP). In particular, strong pelagic-benthic coupling is apparent in MIS 3, as demonstrated by increased primary productivity, indicated by moderate DAR and the dominance of benthic foraminiferal species which prefer fresh phytodetritus. A decline in upwelling intensity and nutrient availability follows, which resulted in a proportionately larger amount of older, degraded matter, provoking a shift in the benthic foraminifera fauna composition. This rapid response of the benthic environment continues with a progressive increase in upwelling intensity due to sea level and oceanographic changes and according high surface production during the LGM. During Heinrich event 1 and the Younger Dryas, extreme levels of primary production actually hindered benthic environment through the development of low oxygen conditions. After this period, a final change in benthic foraminiferal community composition occurs which indicates a return to more oxygenated conditions during the Holocene. Article in Journal/Newspaper Northeast Atlantic Vrije Universiteit Amsterdam (VU): Research Portal Quaternary Science Reviews 106 299 315 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Benthic foraminifera Palaeoproductivity Pelagic-benthic Subtropical NE Atlantic Upwelling /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Benthic foraminifera Palaeoproductivity Pelagic-benthic Subtropical NE Atlantic Upwelling /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water McKay, C. L. Filipsson, H. L. Romero, O. E. Stuut, J. B.W. Donner, B. Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP |
topic_facet |
Benthic foraminifera Palaeoproductivity Pelagic-benthic Subtropical NE Atlantic Upwelling /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
We present a high resolution, multiproxy study of the relationship between pelagic and benthic environments of a coastal upwelling system in the subtropical NE Atlantic Ocean. Marine sediments corresponding to late MIS3 to the Holocene in the radiocarbon dated core GeoB7926, retrieved off Mauritania (21°N) were analysed to reconstruct productivity in surface waters and its linkage to deep waters during the last 35kaBP. High latitude cold events and changes in atmospheric and oceanographic dynamics influenced upwelling intensity over this time period. Subsequently, this caused changes in primary productivity off this low-latitude coastal upwelling locality. The benthic foraminiferal fauna displays four main community shifts corresponding to fundamental climatic events, first of all during late MIS3 (35-28kaBP), secondly from 28 to 19kaBP (including Heinrich event 2 and the LGM), thirdly within Heinrich event 1, the Bølling Allerød and the Younger Dryas (18-11.5kaBP) and finally during the Holocene (11.5-0kaBP). In particular, strong pelagic-benthic coupling is apparent in MIS 3, as demonstrated by increased primary productivity, indicated by moderate DAR and the dominance of benthic foraminiferal species which prefer fresh phytodetritus. A decline in upwelling intensity and nutrient availability follows, which resulted in a proportionately larger amount of older, degraded matter, provoking a shift in the benthic foraminifera fauna composition. This rapid response of the benthic environment continues with a progressive increase in upwelling intensity due to sea level and oceanographic changes and according high surface production during the LGM. During Heinrich event 1 and the Younger Dryas, extreme levels of primary production actually hindered benthic environment through the development of low oxygen conditions. After this period, a final change in benthic foraminiferal community composition occurs which indicates a return to more oxygenated conditions during the Holocene. |
format |
Article in Journal/Newspaper |
author |
McKay, C. L. Filipsson, H. L. Romero, O. E. Stuut, J. B.W. Donner, B. |
author_facet |
McKay, C. L. Filipsson, H. L. Romero, O. E. Stuut, J. B.W. Donner, B. |
author_sort |
McKay, C. L. |
title |
Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP |
title_short |
Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP |
title_full |
Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP |
title_fullStr |
Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP |
title_full_unstemmed |
Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP |
title_sort |
pelagic-benthic coupling within an upwelling system of the subtropical northeast atlantic over the last 35kabp |
publishDate |
2014 |
url |
https://research.vu.nl/en/publications/437dc167-3989-49a8-877c-2891ef68da14 https://doi.org/10.1016/j.quascirev.2014.04.027 https://hdl.handle.net/1871.1/437dc167-3989-49a8-877c-2891ef68da14 http://www.scopus.com/inward/record.url?scp=85027922070&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85027922070&partnerID=8YFLogxK |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
McKay , C L , Filipsson , H L , Romero , O E , Stuut , J B W & Donner , B 2014 , ' Pelagic-benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35kaBP ' , Quaternary Science Reviews , vol. 106 , pp. 299-315 . https://doi.org/10.1016/j.quascirev.2014.04.027 |
op_relation |
https://research.vu.nl/en/publications/437dc167-3989-49a8-877c-2891ef68da14 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.04.027 |
container_title |
Quaternary Science Reviews |
container_volume |
106 |
container_start_page |
299 |
op_container_end_page |
315 |
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1799485970156879872 |