Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años
We present a new record of coccolithophore (coccoliths) export productivity for the past 30,000 years based on the study of a marine sediment core collected at the western entrance of the Strait of Magellan (Core MD07-3128; 53 degrees S, 75 degrees W). This sediment core revealed the presence of an...
Published in: | Latin American Journal of Aquatic Research |
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fttriple:oai:gotriple.eu:10670/1.zktxqe 2023-05-15T13:59:59+02:00 Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años Cocolitóforos in marine sediments versus the western entrance of the Magallanes Strait (53°S) reveal changes in productivity over the last 30.000 years Sanchez, Gloria E. Lange, Carina B. Flores, Jose-abel Caniupan, Magaly Lamy, Frank https://doi.org/10.3856/vol42-issue5-fulltext-8 https://archimer.ifremer.fr/doc/00289/40052/38797.pdf https://archimer.ifremer.fr/doc/00289/40052/ es spa Univ Catolica De Valparaiso doi:10.3856/vol42-issue5-fulltext-8 10670/1.zktxqe https://archimer.ifremer.fr/doc/00289/40052/38797.pdf https://archimer.ifremer.fr/doc/00289/40052/ other Archimer, archive institutionnelle de l'Ifremer Latin American Journal Of Aquatic Research (0718-560X) (Univ Catolica De Valparaiso), 2014-11 , Vol. 42 , N. 5 , P. 1035-1049 anthro-bio archeo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.3856/vol42-issue5-fulltext-8 2023-01-22T16:45:22Z We present a new record of coccolithophore (coccoliths) export productivity for the past 30,000 years based on the study of a marine sediment core collected at the western entrance of the Strait of Magellan (Core MD07-3128; 53 degrees S, 75 degrees W). This sediment core revealed the presence of an assemblage composed by thirteen coccolithophore taxa, dominated by small Gephyrocapsa (> 80% of the total assemblage on the average) and accompanied, in less proportions (1-10%), by two morphotypes of Emiliana huxleyi, Coccolithus pelagicus and Calcidiscus leptoporus. Coccolith concentration and CaCO3 content were strongly correlated (P 30%) and coccolith abundance (similar to 10(9) coccoliths g(-1) dry sediment) coincided with relatively warm periods (e. g., the Holocene). We found marked differences when comparing our data with a coccolith record published by Saavedra-Pellitero et al. (2011) for ODP Site 1233 at 41 degrees S: At ODP Site 1233, coccolithophore production was maximal during the Last Glacial Maximum in response to the northward advection of macronutrients by the Antarctic Circumpolar Current. In contrast, site MD07-3128 experienced a reduction in coccolithophore production at the time, probably related to the negative effect exerted by the high inputs of terrigenous material and meltwater from the then nearby located large Patagonian Ice Sheet. Se presenta un nuevo registro de producción exportada de cocolitóforos (cocolitos) durante los últimos 30.000 años, basado en el estudio de un testigo de sedimento marino obtenido frente a la entrada occidental del Estrecho de Magallanes (testigo MD07-3128; 53°S, 75°W). Este testigo reveló la presencia de una asociación compuesta por trece taxones de cocolitóforos dominada por Gephyrocapsa "small" (representando en promedio >80% de la asociación total) y acompañada, en menor proporción (1-10%), por dos morfotipos de Emiliania huxleyi, Coccolithus pelagicus y Calcidiscus leptoporus. La concentración de cocolitos se correlacionó positivamente con el ... Text Antarc* Antarctic Ice Sheet Unknown Antarctic Entrada ENVELOPE(-60.552,-60.552,-62.998,-62.998) Estrecho ENVELOPE(-60.783,-60.783,-62.467,-62.467) Magallanes ENVELOPE(-62.933,-62.933,-64.883,-64.883) Saavedra ENVELOPE(-57.931,-57.931,-63.317,-63.317) The Antarctic Western Entrance ENVELOPE(-133.030,-133.030,69.455,69.455) Latin American Journal of Aquatic Research 42 5 1035 1049 |
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Spanish |
topic |
anthro-bio archeo |
spellingShingle |
anthro-bio archeo Sanchez, Gloria E. Lange, Carina B. Flores, Jose-abel Caniupan, Magaly Lamy, Frank Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años |
topic_facet |
anthro-bio archeo |
description |
We present a new record of coccolithophore (coccoliths) export productivity for the past 30,000 years based on the study of a marine sediment core collected at the western entrance of the Strait of Magellan (Core MD07-3128; 53 degrees S, 75 degrees W). This sediment core revealed the presence of an assemblage composed by thirteen coccolithophore taxa, dominated by small Gephyrocapsa (> 80% of the total assemblage on the average) and accompanied, in less proportions (1-10%), by two morphotypes of Emiliana huxleyi, Coccolithus pelagicus and Calcidiscus leptoporus. Coccolith concentration and CaCO3 content were strongly correlated (P 30%) and coccolith abundance (similar to 10(9) coccoliths g(-1) dry sediment) coincided with relatively warm periods (e. g., the Holocene). We found marked differences when comparing our data with a coccolith record published by Saavedra-Pellitero et al. (2011) for ODP Site 1233 at 41 degrees S: At ODP Site 1233, coccolithophore production was maximal during the Last Glacial Maximum in response to the northward advection of macronutrients by the Antarctic Circumpolar Current. In contrast, site MD07-3128 experienced a reduction in coccolithophore production at the time, probably related to the negative effect exerted by the high inputs of terrigenous material and meltwater from the then nearby located large Patagonian Ice Sheet. Se presenta un nuevo registro de producción exportada de cocolitóforos (cocolitos) durante los últimos 30.000 años, basado en el estudio de un testigo de sedimento marino obtenido frente a la entrada occidental del Estrecho de Magallanes (testigo MD07-3128; 53°S, 75°W). Este testigo reveló la presencia de una asociación compuesta por trece taxones de cocolitóforos dominada por Gephyrocapsa "small" (representando en promedio >80% de la asociación total) y acompañada, en menor proporción (1-10%), por dos morfotipos de Emiliania huxleyi, Coccolithus pelagicus y Calcidiscus leptoporus. La concentración de cocolitos se correlacionó positivamente con el ... |
format |
Text |
author |
Sanchez, Gloria E. Lange, Carina B. Flores, Jose-abel Caniupan, Magaly Lamy, Frank |
author_facet |
Sanchez, Gloria E. Lange, Carina B. Flores, Jose-abel Caniupan, Magaly Lamy, Frank |
author_sort |
Sanchez, Gloria E. |
title |
Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años |
title_short |
Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años |
title_full |
Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años |
title_fullStr |
Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años |
title_full_unstemmed |
Cocolitóforos en sedimentos marinos frente a la entrada occidental del Estrecho de Magallanes (53°S) revelan cambios en la productividad durante los últimos 30.000 años |
title_sort |
cocolitóforos en sedimentos marinos frente a la entrada occidental del estrecho de magallanes (53°s) revelan cambios en la productividad durante los últimos 30.000 años |
publisher |
Univ Catolica De Valparaiso |
url |
https://doi.org/10.3856/vol42-issue5-fulltext-8 https://archimer.ifremer.fr/doc/00289/40052/38797.pdf https://archimer.ifremer.fr/doc/00289/40052/ |
long_lat |
ENVELOPE(-60.552,-60.552,-62.998,-62.998) ENVELOPE(-60.783,-60.783,-62.467,-62.467) ENVELOPE(-62.933,-62.933,-64.883,-64.883) ENVELOPE(-57.931,-57.931,-63.317,-63.317) ENVELOPE(-133.030,-133.030,69.455,69.455) |
geographic |
Antarctic Entrada Estrecho Magallanes Saavedra The Antarctic Western Entrance |
geographic_facet |
Antarctic Entrada Estrecho Magallanes Saavedra The Antarctic Western Entrance |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Archimer, archive institutionnelle de l'Ifremer Latin American Journal Of Aquatic Research (0718-560X) (Univ Catolica De Valparaiso), 2014-11 , Vol. 42 , N. 5 , P. 1035-1049 |
op_relation |
doi:10.3856/vol42-issue5-fulltext-8 10670/1.zktxqe https://archimer.ifremer.fr/doc/00289/40052/38797.pdf https://archimer.ifremer.fr/doc/00289/40052/ |
op_rights |
other |
op_doi |
https://doi.org/10.3856/vol42-issue5-fulltext-8 |
container_title |
Latin American Journal of Aquatic Research |
container_volume |
42 |
container_issue |
5 |
container_start_page |
1035 |
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1049 |
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