Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain)
International audience Abyssal hills, small topographic features rising above the abyssal seafloor (<1000m altitude), have distinct environmental characteristics compared to abyssal plains, notably the presence of coarser-grained sediments. As a result, they are a major source of habitat heteroge...
Published in: | Marine Micropaleontology |
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Online Access: | https://hal.archives-ouvertes.fr/hal-01453007 https://doi.org/10.1016/j.marmicro.2015.12.005 |
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ftccsdartic:oai:HAL:hal-01453007v1 2023-05-15T17:41:41+02:00 Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain) Stefanoudis, Paris Schiebel, Ralf Mallet, Romain Durden, Jennifer Bett, Brian Gooday, Andrew Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) 2016 https://hal.archives-ouvertes.fr/hal-01453007 https://doi.org/10.1016/j.marmicro.2015.12.005 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2015.12.005 hal-01453007 https://hal.archives-ouvertes.fr/hal-01453007 doi:10.1016/j.marmicro.2015.12.005 OKINA: ua15513 ISSN: 0377-8398 Marine Micropaleontology https://hal.archives-ouvertes.fr/hal-01453007 Marine Micropaleontology, Elsevier, 2016, 123, pp.15-28. ⟨10.1016/j.marmicro.2015.12.005⟩ http://www.sciencedirect.com/science/article/pii/S0377839815300220 Abyssal hills benthic foraminifera Elemental composition Particle Size Test morphometry [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1016/j.marmicro.2015.12.005 2021-11-07T04:03:29Z International audience Abyssal hills, small topographic features rising above the abyssal seafloor (<1000m altitude), have distinct environmental characteristics compared to abyssal plains, notably the presence of coarser-grained sediments. As a result, they are a major source of habitat heterogeneity in the deep sea. The aim of this study was to investigate whether there is a link between abyssal hills and the test characteristics of selected agglutinated benthic foraminiferal species. We analysed 1) the overall morphometry, and 2) the granulometric and chemical (elemental) characteristics of the agglutinated tests of ten common foraminiferal species (Adercotryma glomerata, Ammobaculites agglutinans, Cribrostomoides subglobosus, Lagenammina sp.1, Nodulina dentaliniformis, Portatrochammina murrayi, three Reophax sp. and Recurvoides sp. 9) at four sites (two on top of abyssal hills and two on the adjacent plain) in the area of the Porcupine Abyssal Plain Sustained Observatory, northeast Atlantic. The foraminiferal test data were compared with the particle size distribution and elemental composition of sediments from the study sites in order to explore possible grain size and mineral selectivity. We found differences in the visual appearance of the tests (i.e. the degree of irregularity in their shape), which was confirmed by morphometric analyses, related to seafloor topography. The agglutinated foraminifera selected different sized particles on hills and plains, reflecting the distinct granulometric characteristics of these settings. These characteristics (incorporation of coarse particles, test morphometry) could provide evidence for the recognition of ancient abyssal hill environments, as well as other palaeoceanographic settings that were characterised by enhanced current flow. Furthermore, analyses of sediment samples from the hill and plain sites using wavelength dispersive X-ray fluorescence (WD-XRF) yielded different elemental profiles from the plains, probably a result of winnowing on the hills, ... Article in Journal/Newspaper Northeast Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Marine Micropaleontology 123 15 28 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Abyssal hills benthic foraminifera Elemental composition Particle Size Test morphometry [SDV]Life Sciences [q-bio] |
spellingShingle |
Abyssal hills benthic foraminifera Elemental composition Particle Size Test morphometry [SDV]Life Sciences [q-bio] Stefanoudis, Paris Schiebel, Ralf Mallet, Romain Durden, Jennifer Bett, Brian Gooday, Andrew Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain) |
topic_facet |
Abyssal hills benthic foraminifera Elemental composition Particle Size Test morphometry [SDV]Life Sciences [q-bio] |
description |
International audience Abyssal hills, small topographic features rising above the abyssal seafloor (<1000m altitude), have distinct environmental characteristics compared to abyssal plains, notably the presence of coarser-grained sediments. As a result, they are a major source of habitat heterogeneity in the deep sea. The aim of this study was to investigate whether there is a link between abyssal hills and the test characteristics of selected agglutinated benthic foraminiferal species. We analysed 1) the overall morphometry, and 2) the granulometric and chemical (elemental) characteristics of the agglutinated tests of ten common foraminiferal species (Adercotryma glomerata, Ammobaculites agglutinans, Cribrostomoides subglobosus, Lagenammina sp.1, Nodulina dentaliniformis, Portatrochammina murrayi, three Reophax sp. and Recurvoides sp. 9) at four sites (two on top of abyssal hills and two on the adjacent plain) in the area of the Porcupine Abyssal Plain Sustained Observatory, northeast Atlantic. The foraminiferal test data were compared with the particle size distribution and elemental composition of sediments from the study sites in order to explore possible grain size and mineral selectivity. We found differences in the visual appearance of the tests (i.e. the degree of irregularity in their shape), which was confirmed by morphometric analyses, related to seafloor topography. The agglutinated foraminifera selected different sized particles on hills and plains, reflecting the distinct granulometric characteristics of these settings. These characteristics (incorporation of coarse particles, test morphometry) could provide evidence for the recognition of ancient abyssal hill environments, as well as other palaeoceanographic settings that were characterised by enhanced current flow. Furthermore, analyses of sediment samples from the hill and plain sites using wavelength dispersive X-ray fluorescence (WD-XRF) yielded different elemental profiles from the plains, probably a result of winnowing on the hills, ... |
author2 |
Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) |
format |
Article in Journal/Newspaper |
author |
Stefanoudis, Paris Schiebel, Ralf Mallet, Romain Durden, Jennifer Bett, Brian Gooday, Andrew |
author_facet |
Stefanoudis, Paris Schiebel, Ralf Mallet, Romain Durden, Jennifer Bett, Brian Gooday, Andrew |
author_sort |
Stefanoudis, Paris |
title |
Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain) |
title_short |
Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain) |
title_full |
Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain) |
title_fullStr |
Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain) |
title_full_unstemmed |
Agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal NE Atlantic (Porcupine Abyssal Plain) |
title_sort |
agglutination of benthic foraminifera in relation to mesoscale bathymetric features in the abyssal ne atlantic (porcupine abyssal plain) |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01453007 https://doi.org/10.1016/j.marmicro.2015.12.005 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 0377-8398 Marine Micropaleontology https://hal.archives-ouvertes.fr/hal-01453007 Marine Micropaleontology, Elsevier, 2016, 123, pp.15-28. ⟨10.1016/j.marmicro.2015.12.005⟩ http://www.sciencedirect.com/science/article/pii/S0377839815300220 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2015.12.005 hal-01453007 https://hal.archives-ouvertes.fr/hal-01453007 doi:10.1016/j.marmicro.2015.12.005 OKINA: ua15513 |
op_doi |
https://doi.org/10.1016/j.marmicro.2015.12.005 |
container_title |
Marine Micropaleontology |
container_volume |
123 |
container_start_page |
15 |
op_container_end_page |
28 |
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1766143370997006336 |