A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica)
Integrated Ocean Drilling Program (IODP) Expedition 318 recovered a ∼ 170 m long Holocene organic-rich sedimentary sequence at Site U1357. Located within the narrow but deep Adélie Basin close to the Antarctic margin, the site accumulated sediments at exceptionally high sedimentation rates, which re...
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ftcopernicus:oai:publications.copernicus.org:jm69224 2023-05-15T13:55:28+02:00 A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica) Hartman, Julian D. Bijl, Peter K. Sangiorgi, Francesca 2020-01-23 application/pdf https://doi.org/10.5194/jm-37-445-2018 https://jm.copernicus.org/articles/37/445/2018/ eng eng doi:10.5194/jm-37-445-2018 https://jm.copernicus.org/articles/37/445/2018/ eISSN: 2041-4978 Text 2020 ftcopernicus https://doi.org/10.5194/jm-37-445-2018 2020-07-20T16:23:05Z Integrated Ocean Drilling Program (IODP) Expedition 318 recovered a ∼ 170 m long Holocene organic-rich sedimentary sequence at Site U1357. Located within the narrow but deep Adélie Basin close to the Antarctic margin, the site accumulated sediments at exceptionally high sedimentation rates, which resulted in extraordinary preservation of the organic sedimentary component. Here, we present an overview of 74 different mainly marine microfossil taxa and/or types found within the organic component of the sediment, which include the remains of unicellular and higher organisms from three eukaryotic kingdoms (Chromista, Plantae, and Animalia). These remains include phytoplanktonic (phototrophic dinoflagellates and prasinophytes) and very diverse zooplanktonic (heterotrophic dinoflagellates, tintinnids, copepods) organisms. We illustrate each marine microfossil taxon or type identified by providing morphological details and photographic images, which will help with their identification in future studies. We also review their ecological preferences to aid future (palaeo)ecological and (palaeo)environmental studies. The planktonic assemblage shows a high degree of endemism related to the strong influence of the sea-ice system over Site U1357. In addition, we found the remains of various species of detritus feeders and bottom-dwelling scavengers (benthic foraminifers and annelid worms) indicative of high export productivity at Site U1357. This study shows the potential of organic microfossil remains for reconstructing past environmental conditions, such as sea-ice cover and (export) productivity. Text Antarc* Antarctic Antarctica East Antarctica Sea ice Copepods Copernicus Publications: E-Journals Antarctic East Antarctica The Antarctic Journal of Micropalaeontology 37 2 445 497 |
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Copernicus Publications: E-Journals |
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language |
English |
description |
Integrated Ocean Drilling Program (IODP) Expedition 318 recovered a ∼ 170 m long Holocene organic-rich sedimentary sequence at Site U1357. Located within the narrow but deep Adélie Basin close to the Antarctic margin, the site accumulated sediments at exceptionally high sedimentation rates, which resulted in extraordinary preservation of the organic sedimentary component. Here, we present an overview of 74 different mainly marine microfossil taxa and/or types found within the organic component of the sediment, which include the remains of unicellular and higher organisms from three eukaryotic kingdoms (Chromista, Plantae, and Animalia). These remains include phytoplanktonic (phototrophic dinoflagellates and prasinophytes) and very diverse zooplanktonic (heterotrophic dinoflagellates, tintinnids, copepods) organisms. We illustrate each marine microfossil taxon or type identified by providing morphological details and photographic images, which will help with their identification in future studies. We also review their ecological preferences to aid future (palaeo)ecological and (palaeo)environmental studies. The planktonic assemblage shows a high degree of endemism related to the strong influence of the sea-ice system over Site U1357. In addition, we found the remains of various species of detritus feeders and bottom-dwelling scavengers (benthic foraminifers and annelid worms) indicative of high export productivity at Site U1357. This study shows the potential of organic microfossil remains for reconstructing past environmental conditions, such as sea-ice cover and (export) productivity. |
format |
Text |
author |
Hartman, Julian D. Bijl, Peter K. Sangiorgi, Francesca |
spellingShingle |
Hartman, Julian D. Bijl, Peter K. Sangiorgi, Francesca A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica) |
author_facet |
Hartman, Julian D. Bijl, Peter K. Sangiorgi, Francesca |
author_sort |
Hartman, Julian D. |
title |
A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica) |
title_short |
A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica) |
title_full |
A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica) |
title_fullStr |
A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica) |
title_full_unstemmed |
A review of the ecological affinities of marine organic microfossils from a Holocene record offshore of Adélie Land (East Antarctica) |
title_sort |
review of the ecological affinities of marine organic microfossils from a holocene record offshore of adélie land (east antarctica) |
publishDate |
2020 |
url |
https://doi.org/10.5194/jm-37-445-2018 https://jm.copernicus.org/articles/37/445/2018/ |
geographic |
Antarctic East Antarctica The Antarctic |
geographic_facet |
Antarctic East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice Copepods |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice Copepods |
op_source |
eISSN: 2041-4978 |
op_relation |
doi:10.5194/jm-37-445-2018 https://jm.copernicus.org/articles/37/445/2018/ |
op_doi |
https://doi.org/10.5194/jm-37-445-2018 |
container_title |
Journal of Micropalaeontology |
container_volume |
37 |
container_issue |
2 |
container_start_page |
445 |
op_container_end_page |
497 |
_version_ |
1766262123323719680 |