Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site"
Integrative research including facies characterization, ichnological composition and foraminifer analysis has been conducted on cores from Site U1385 of the IODP Expedition 339 to evaluate the incidence of Marine Isotope Stage (MIS) 12 and MIS 11 on deep-sea environmental changes. Four color facies...
Published in: | Global and Planetary Change |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2015
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Online Access: | http://eprints.esc.cam.ac.uk/3515/ http://eprints.esc.cam.ac.uk/3515/1/1-s2.0-S0921818115300072-gr1.jpg http://eprints.esc.cam.ac.uk/3515/2/1-s2.0-S0921818115300072-main.pdf http://www.sciencedirect.com/science/article/pii/S0921818115300072 https://doi.org/10.1016/j.gloplacha.2015.08.012 |
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:3515 |
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institution |
Open Polar |
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University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Rodríguez-Tovar, Francisco J. Dorador, Javier Martin-Garcia, Gloria M. Sierro, Francisco J. Flores, Jose A. Hodell, David A. Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site" |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
Integrative research including facies characterization, ichnological composition and foraminifer analysis has been conducted on cores from Site U1385 of the IODP Expedition 339 to evaluate the incidence of Marine Isotope Stage (MIS) 12 and MIS 11 on deep-sea environmental changes. Four color facies groups have been differentiated, showing variable transitions between them (bioturbated, gradual and sharp contacts). Trace fossil assemblage, assigned to the Zoophycos ichnofacies, consists of light and dark filled structures, with Alcyonidiopsis, Chondrites, Nereites, Planolites, Spirophyton, Thalassinoides, Thalassinoides-like structures, and Zoophycos. A deep-sea multi-tiered trace fossil community is interpreted, revealing predominance of well-oxygenated bottom and pore-waters, as well as abundance of food in the sediment for macrobenthic tracemaker community. Changes in environmental parameters are interpreted to be associated with significant variations in trace fossil distribution according to the differentiated intervals (A to M). Benthic foraminifer concentration in the sediments and variations of the planktonic foraminifer assemblages suggest significant changes in surface productivity and food supply to the sea floor since the ending of MIS 13 to the end of MIS 11 that could be correlated with the registered changes in facies and trace fossil assemblages. At the end of MIS 13 values of annual export productivity were very low, that together with the presence of light-color sediments and the continuous presence of light Planolites and Thalassinoides, reveal lower organic carbon flux to the bottom and high oxygen conditions (interval A). Afterwards the organic matter supply increased rapidly and remained very high until Termination V, determining an eutrophic environment, expressed by high benthic foraminifer accumulation rates, and reduced availability of oxygen, that correlate with the record of Spirophyton and Zoophycos, and the presence of Chondrites, observed in intervals B and D. Lower benthic foraminifer accumulation rates during MIS 11 suggest an oligotrophic environment at the bottom consistent with lower inputs of organic carbon, associated with high oxygen content of bottom waters that agrees with the lighter color of the sediments as well as by the continuous presence of light Planolites and Thalassinoides in the differentiated interval M. The evolution of the macrobenthic tracemaker community during MIS 12 and MIS 11 responds to major changes in bottom water ventilation probably linked to variations in deep water (North Atlantic) thermohaline circulation, determining variations in oxygen and food availability. |
format |
Article in Journal/Newspaper |
author |
Rodríguez-Tovar, Francisco J. Dorador, Javier Martin-Garcia, Gloria M. Sierro, Francisco J. Flores, Jose A. Hodell, David A. |
author_facet |
Rodríguez-Tovar, Francisco J. Dorador, Javier Martin-Garcia, Gloria M. Sierro, Francisco J. Flores, Jose A. Hodell, David A. |
author_sort |
Rodríguez-Tovar, Francisco J. |
title |
Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site" |
title_short |
Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site" |
title_full |
Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site" |
title_fullStr |
Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site" |
title_full_unstemmed |
Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site" |
title_sort |
response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from marine isotope stage (mis) 12 to 11 at the "shackleton site" |
publishDate |
2015 |
url |
http://eprints.esc.cam.ac.uk/3515/ http://eprints.esc.cam.ac.uk/3515/1/1-s2.0-S0921818115300072-gr1.jpg http://eprints.esc.cam.ac.uk/3515/2/1-s2.0-S0921818115300072-main.pdf http://www.sciencedirect.com/science/article/pii/S0921818115300072 https://doi.org/10.1016/j.gloplacha.2015.08.012 |
geographic |
Shackleton |
geographic_facet |
Shackleton |
genre |
North Atlantic North atlantic Thermohaline circulation |
genre_facet |
North Atlantic North atlantic Thermohaline circulation |
op_relation |
http://eprints.esc.cam.ac.uk/3515/1/1-s2.0-S0921818115300072-gr1.jpg http://eprints.esc.cam.ac.uk/3515/2/1-s2.0-S0921818115300072-main.pdf Rodríguez-Tovar, Francisco J. and Dorador, Javier and Martin-Garcia, Gloria M. and Sierro, Francisco J. and Flores, Jose A. and Hodell, David A. (2015) Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site". Global and Planetary Change, 133. pp. 176-187. ISSN 0921-8181 DOI https://doi.org/10.1016/j.gloplacha.2015.08.012 <https://doi.org/10.1016/j.gloplacha.2015.08.012> |
op_doi |
https://doi.org/10.1016/j.gloplacha.2015.08.012 |
container_title |
Global and Planetary Change |
container_volume |
133 |
container_start_page |
176 |
op_container_end_page |
187 |
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1766137009804410880 |
spelling |
ftucambridgeesc:oai:eprints.esc.cam.ac.uk:3515 2023-05-15T17:37:13+02:00 Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site" Rodríguez-Tovar, Francisco J. Dorador, Javier Martin-Garcia, Gloria M. Sierro, Francisco J. Flores, Jose A. Hodell, David A. 2015-10 image text http://eprints.esc.cam.ac.uk/3515/ http://eprints.esc.cam.ac.uk/3515/1/1-s2.0-S0921818115300072-gr1.jpg http://eprints.esc.cam.ac.uk/3515/2/1-s2.0-S0921818115300072-main.pdf http://www.sciencedirect.com/science/article/pii/S0921818115300072 https://doi.org/10.1016/j.gloplacha.2015.08.012 en eng http://eprints.esc.cam.ac.uk/3515/1/1-s2.0-S0921818115300072-gr1.jpg http://eprints.esc.cam.ac.uk/3515/2/1-s2.0-S0921818115300072-main.pdf Rodríguez-Tovar, Francisco J. and Dorador, Javier and Martin-Garcia, Gloria M. and Sierro, Francisco J. and Flores, Jose A. and Hodell, David A. (2015) Response of macrobenthic and foraminifer communities to changes in deep-sea environmental conditions from Marine Isotope Stage (MIS) 12 to 11 at the "Shackleton Site". Global and Planetary Change, 133. pp. 176-187. ISSN 0921-8181 DOI https://doi.org/10.1016/j.gloplacha.2015.08.012 <https://doi.org/10.1016/j.gloplacha.2015.08.012> 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2015 ftucambridgeesc https://doi.org/10.1016/j.gloplacha.2015.08.012 2020-08-27T18:09:41Z Integrative research including facies characterization, ichnological composition and foraminifer analysis has been conducted on cores from Site U1385 of the IODP Expedition 339 to evaluate the incidence of Marine Isotope Stage (MIS) 12 and MIS 11 on deep-sea environmental changes. Four color facies groups have been differentiated, showing variable transitions between them (bioturbated, gradual and sharp contacts). Trace fossil assemblage, assigned to the Zoophycos ichnofacies, consists of light and dark filled structures, with Alcyonidiopsis, Chondrites, Nereites, Planolites, Spirophyton, Thalassinoides, Thalassinoides-like structures, and Zoophycos. A deep-sea multi-tiered trace fossil community is interpreted, revealing predominance of well-oxygenated bottom and pore-waters, as well as abundance of food in the sediment for macrobenthic tracemaker community. Changes in environmental parameters are interpreted to be associated with significant variations in trace fossil distribution according to the differentiated intervals (A to M). Benthic foraminifer concentration in the sediments and variations of the planktonic foraminifer assemblages suggest significant changes in surface productivity and food supply to the sea floor since the ending of MIS 13 to the end of MIS 11 that could be correlated with the registered changes in facies and trace fossil assemblages. At the end of MIS 13 values of annual export productivity were very low, that together with the presence of light-color sediments and the continuous presence of light Planolites and Thalassinoides, reveal lower organic carbon flux to the bottom and high oxygen conditions (interval A). Afterwards the organic matter supply increased rapidly and remained very high until Termination V, determining an eutrophic environment, expressed by high benthic foraminifer accumulation rates, and reduced availability of oxygen, that correlate with the record of Spirophyton and Zoophycos, and the presence of Chondrites, observed in intervals B and D. Lower benthic foraminifer accumulation rates during MIS 11 suggest an oligotrophic environment at the bottom consistent with lower inputs of organic carbon, associated with high oxygen content of bottom waters that agrees with the lighter color of the sediments as well as by the continuous presence of light Planolites and Thalassinoides in the differentiated interval M. The evolution of the macrobenthic tracemaker community during MIS 12 and MIS 11 responds to major changes in bottom water ventilation probably linked to variations in deep water (North Atlantic) thermohaline circulation, determining variations in oxygen and food availability. Article in Journal/Newspaper North Atlantic North atlantic Thermohaline circulation University of Cambridge, Department of Earth Sciences: ESC Publications Shackleton Global and Planetary Change 133 176 187 |