Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic
Multidisciplinary studies have allowed us to describe the abiotic landscapes and, thus, reveal the ichnological and benthic foraminifera trends in a deep-water gateway. Mesoscale landscape mapping is presented based on the bathymetric position index, substrate types and near-bottom water temperature...
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Geosciences
2021
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ftunivvigo:oai:investigo.biblioteca.uvigo.es:11093/2757 2023-05-15T14:03:04+02:00 Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic Dorokhova, Evgenia V. Rodríguez Tovar, Francisco Javier Dorokhov, Dmitry V. Kuleshova, Liubov A. Mena Rodriguez, Angel Glazkova, Tatiana Krechik, Viktor A. 2021-11-19 http://hdl.handle.net/11093/2757 https://doi.org/10.3390/geosciences11110474 https://www.mdpi.com/2076-3263/11/11/474 eng eng Geosciences info:eu-repo/grantAgreement/ES/MICINN/CGL2015-66835-P info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104625RB-100/ES Geosciences, 11(11): 474 (2021) 20763263 http://hdl.handle.net/11093/2757 doi:10.3390/geosciences11110474 https://www.mdpi.com/2076-3263/11/11/474 openAccess 2510.90 Geología Marina 2506.18 Sedimentología 2510 Oceanografía article 2021 ftunivvigo https://doi.org/10.3390/geosciences11110474 2022-04-05T23:18:10Z Multidisciplinary studies have allowed us to describe the abiotic landscapes and, thus, reveal the ichnological and benthic foraminifera trends in a deep-water gateway. Mesoscale landscape mapping is presented based on the bathymetric position index, substrate types and near-bottom water temperature. Four sediment cores, retrieved from the entrance, centre and exit of the gap, were subject to computed tomography, ichnological and benthic foraminifera studies. A high diversity of abiotic landscapes in the relatively small area of Discovery Gap is detected and its landscape is characterized by 23 landscape types. The most heterogeneous abiotic factor is a topography that is associated with sediment patchiness and substrate variability. The ichnological and tomographical studies of the sediment cores demonstrate lateral and temporal differences in the macrobenthic tracemaker behaviour. The ichnofossils assemblage of the sediment core can be assigned to the Zoophycos ichnofacies with a higher presence of Zoophycos in the entrance site of the gap and during glacial intervals. Higher benthic foraminifera diversity and species richness during the Holocene are also registered in the southern part of the gap compared to the northern part. The spatial and temporal differences in macro-benthos behavior and benthic foraminifera distribution in the deep-water gateway are proposed to relate to the topographical variations of the Antarctic Bottom Water and its influence on the hydrodynamic regime, nutrient transport, etc. Russian Science Foundation | Ref. 19-17-00246 Junta de Andalucía | Ref. P18-460 RT-4074 Ministerio de Ciencia e Innovación | Ref. CGL2015-66835-P Ministerio de Ciencia e Innovación | Ref. PID2019-104625RB-100 Junta de Andalucía | Ref. B-RNM-072-UGR18 Universidad de Granada | Ref. UCE-2016-05 Institute of Oceanology of the Russian Academy of Sciences (IO RAS) | Ref. 0128-2021-0016 Article in Journal/Newspaper Antarc* Antarctic University of Vigo: Investigo (Repositorio Institucional de la Universidade de Vigo) Antarctic The Antarctic Geosciences 11 11 474 |
institution |
Open Polar |
collection |
University of Vigo: Investigo (Repositorio Institucional de la Universidade de Vigo) |
op_collection_id |
ftunivvigo |
language |
English |
topic |
2510.90 Geología Marina 2506.18 Sedimentología 2510 Oceanografía |
spellingShingle |
2510.90 Geología Marina 2506.18 Sedimentología 2510 Oceanografía Dorokhova, Evgenia V. Rodríguez Tovar, Francisco Javier Dorokhov, Dmitry V. Kuleshova, Liubov A. Mena Rodriguez, Angel Glazkova, Tatiana Krechik, Viktor A. Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic |
topic_facet |
2510.90 Geología Marina 2506.18 Sedimentología 2510 Oceanografía |
description |
Multidisciplinary studies have allowed us to describe the abiotic landscapes and, thus, reveal the ichnological and benthic foraminifera trends in a deep-water gateway. Mesoscale landscape mapping is presented based on the bathymetric position index, substrate types and near-bottom water temperature. Four sediment cores, retrieved from the entrance, centre and exit of the gap, were subject to computed tomography, ichnological and benthic foraminifera studies. A high diversity of abiotic landscapes in the relatively small area of Discovery Gap is detected and its landscape is characterized by 23 landscape types. The most heterogeneous abiotic factor is a topography that is associated with sediment patchiness and substrate variability. The ichnological and tomographical studies of the sediment cores demonstrate lateral and temporal differences in the macrobenthic tracemaker behaviour. The ichnofossils assemblage of the sediment core can be assigned to the Zoophycos ichnofacies with a higher presence of Zoophycos in the entrance site of the gap and during glacial intervals. Higher benthic foraminifera diversity and species richness during the Holocene are also registered in the southern part of the gap compared to the northern part. The spatial and temporal differences in macro-benthos behavior and benthic foraminifera distribution in the deep-water gateway are proposed to relate to the topographical variations of the Antarctic Bottom Water and its influence on the hydrodynamic regime, nutrient transport, etc. Russian Science Foundation | Ref. 19-17-00246 Junta de Andalucía | Ref. P18-460 RT-4074 Ministerio de Ciencia e Innovación | Ref. CGL2015-66835-P Ministerio de Ciencia e Innovación | Ref. PID2019-104625RB-100 Junta de Andalucía | Ref. B-RNM-072-UGR18 Universidad de Granada | Ref. UCE-2016-05 Institute of Oceanology of the Russian Academy of Sciences (IO RAS) | Ref. 0128-2021-0016 |
format |
Article in Journal/Newspaper |
author |
Dorokhova, Evgenia V. Rodríguez Tovar, Francisco Javier Dorokhov, Dmitry V. Kuleshova, Liubov A. Mena Rodriguez, Angel Glazkova, Tatiana Krechik, Viktor A. |
author_facet |
Dorokhova, Evgenia V. Rodríguez Tovar, Francisco Javier Dorokhov, Dmitry V. Kuleshova, Liubov A. Mena Rodriguez, Angel Glazkova, Tatiana Krechik, Viktor A. |
author_sort |
Dorokhova, Evgenia V. |
title |
Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic |
title_short |
Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic |
title_full |
Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic |
title_fullStr |
Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic |
title_full_unstemmed |
Landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, NE Atlantic |
title_sort |
landscape mapping, ichnological and benthic foraminifera trends in a deep-water gateway, discovery gap, ne atlantic |
publisher |
Geosciences |
publishDate |
2021 |
url |
http://hdl.handle.net/11093/2757 https://doi.org/10.3390/geosciences11110474 https://www.mdpi.com/2076-3263/11/11/474 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/grantAgreement/ES/MICINN/CGL2015-66835-P info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104625RB-100/ES Geosciences, 11(11): 474 (2021) 20763263 http://hdl.handle.net/11093/2757 doi:10.3390/geosciences11110474 https://www.mdpi.com/2076-3263/11/11/474 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3390/geosciences11110474 |
container_title |
Geosciences |
container_volume |
11 |
container_issue |
11 |
container_start_page |
474 |
_version_ |
1766273553073700864 |