Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties?
In the Atlantic sector of the Southern Ocean up to 35°S, Neogene benthic foraminiferal faunal changes have been interpreted, alternatively, as changes in deep water-masses distribution and organic matter availability, in surface, the Southwestern South Atlantic presents a highly dynamic frontal zone...
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ftunibueairesbd:paper:paper_00262803_v60_n2_p195_Chapori 2023-05-15T13:42:25+02:00 Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties? 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00262803_v60_n2_p195_Chapori https://hdl.handle.net/20.500.12110/paper_00262803_v60_n2_p195_Chapori unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00262803_v60_n2_p195_Chapori http://hdl.handle.net/20.500.12110/paper_00262803_v60_n2_p195_Chapori Benthic foraminifera Mid-Late pleistocene Paleoceanography Primary productivity South atlantic ocean abundance fauna Neogene organic carbon Pleistocene primary production upwelling water mass Atlantic Ocean Atlantic Ocean (South) Patagonia Foraminifera 2014 ftunibueairesbd https://doi.org/20.500.12110/paper_00262803_v60_n2_p195_Chapori 2023-02-16T01:54:55Z In the Atlantic sector of the Southern Ocean up to 35°S, Neogene benthic foraminiferal faunal changes have been interpreted, alternatively, as changes in deep water-masses distribution and organic matter availability, in surface, the Southwestern South Atlantic presents a highly dynamic frontal zone and exhibits large spatial and temporal variability in primary productivity that influences the export of organic carbon from the euphotic zone. However, below ∼1000 meters depth, it is characterized by the interaction of several water masses. For this reason, the western sector of the South Atlantic is a natural laboratory to test the benthic foraminifera's response to changes in both, the deep water-masses distribution and the exported productivity, in order to define which was the main factor controlling the benthic foraminiferal assemblages structure during a glacial Mid-Late Pleistocene event, abundance analysis of organic matter content, oxygen availability and water masses marker species, and Q-mode factor analysis were carried out on core SP1251 (3400m; ∼3S°S - 54°W). Our results indicate that the benthic foraminiferal assemblages are mainly composed of high organic matter and oxygen availability-associated species revealing that productivity has been the main factor in determining the stracture of the assemblages' composition. These results also reflect that surface productivity regime would have not been uniform as a result of variations in the shelfbreak up welling of Patagonia as a consequence of variations in the Antarctic upwelling. Other/Unknown Material Antarc* Antarctic South Atlantic Ocean Southern Ocean Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Patagonia Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Benthic foraminifera Mid-Late pleistocene Paleoceanography Primary productivity South atlantic ocean abundance fauna Neogene organic carbon Pleistocene primary production upwelling water mass Atlantic Ocean Atlantic Ocean (South) Patagonia Foraminifera |
spellingShingle |
Benthic foraminifera Mid-Late pleistocene Paleoceanography Primary productivity South atlantic ocean abundance fauna Neogene organic carbon Pleistocene primary production upwelling water mass Atlantic Ocean Atlantic Ocean (South) Patagonia Foraminifera Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties? |
topic_facet |
Benthic foraminifera Mid-Late pleistocene Paleoceanography Primary productivity South atlantic ocean abundance fauna Neogene organic carbon Pleistocene primary production upwelling water mass Atlantic Ocean Atlantic Ocean (South) Patagonia Foraminifera |
description |
In the Atlantic sector of the Southern Ocean up to 35°S, Neogene benthic foraminiferal faunal changes have been interpreted, alternatively, as changes in deep water-masses distribution and organic matter availability, in surface, the Southwestern South Atlantic presents a highly dynamic frontal zone and exhibits large spatial and temporal variability in primary productivity that influences the export of organic carbon from the euphotic zone. However, below ∼1000 meters depth, it is characterized by the interaction of several water masses. For this reason, the western sector of the South Atlantic is a natural laboratory to test the benthic foraminifera's response to changes in both, the deep water-masses distribution and the exported productivity, in order to define which was the main factor controlling the benthic foraminiferal assemblages structure during a glacial Mid-Late Pleistocene event, abundance analysis of organic matter content, oxygen availability and water masses marker species, and Q-mode factor analysis were carried out on core SP1251 (3400m; ∼3S°S - 54°W). Our results indicate that the benthic foraminiferal assemblages are mainly composed of high organic matter and oxygen availability-associated species revealing that productivity has been the main factor in determining the stracture of the assemblages' composition. These results also reflect that surface productivity regime would have not been uniform as a result of variations in the shelfbreak up welling of Patagonia as a consequence of variations in the Antarctic upwelling. |
title |
Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties? |
title_short |
Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties? |
title_full |
Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties? |
title_fullStr |
Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties? |
title_full_unstemmed |
Mid-late pleistocene benthic foraminifera from Southwestern South Atlantic: Driven by primary productivity or water mass properties? |
title_sort |
mid-late pleistocene benthic foraminifera from southwestern south atlantic: driven by primary productivity or water mass properties? |
publishDate |
2014 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00262803_v60_n2_p195_Chapori https://hdl.handle.net/20.500.12110/paper_00262803_v60_n2_p195_Chapori |
geographic |
Antarctic Patagonia Southern Ocean The Antarctic |
geographic_facet |
Antarctic Patagonia Southern Ocean The Antarctic |
genre |
Antarc* Antarctic South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic South Atlantic Ocean Southern Ocean |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00262803_v60_n2_p195_Chapori http://hdl.handle.net/20.500.12110/paper_00262803_v60_n2_p195_Chapori |
op_doi |
https://doi.org/20.500.12110/paper_00262803_v60_n2_p195_Chapori |
_version_ |
1766167677965959168 |