An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities
Dinoflagellate cyst assemblages present a valuable proxy to infer paleoceanographic conditions, yet factors influencing geographic distributions of species remain largely unknown, especially in the Southern Ocean. Strong lateral transport, sea-ice dynamics, and a sparse and uneven geographic distrib...
Published in: | Journal of Micropalaeontology |
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00066831 2023-06-18T03:38:11+02:00 An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities Thöle, Lena Mareike Nooteboom, Peter Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter Kristian 2023-06 electronic https://doi.org/10.5194/jm-42-35-2023 https://noa.gwlb.de/receive/cop_mods_00066831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065302/jm-42-35-2023.pdf https://jm.copernicus.org/articles/42/35/2023/jm-42-35-2023.pdf eng eng Copernicus Publications Journal of Micropalaeontology -- http://www.bibliothek.uni-regensburg.de/ezeit/?2053393 -- https://www.j-micropalaeontol.net/volumes.html -- http://jm.geoscienceworld.org/ -- 2041-4978 https://doi.org/10.5194/jm-42-35-2023 https://noa.gwlb.de/receive/cop_mods_00066831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065302/jm-42-35-2023.pdf https://jm.copernicus.org/articles/42/35/2023/jm-42-35-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/jm-42-35-2023 2023-06-04T23:18:50Z Dinoflagellate cyst assemblages present a valuable proxy to infer paleoceanographic conditions, yet factors influencing geographic distributions of species remain largely unknown, especially in the Southern Ocean. Strong lateral transport, sea-ice dynamics, and a sparse and uneven geographic distribution of surface sediment samples have limited the use of dinocyst assemblages as a quantitative proxy for paleo-environmental conditions such as sea surface temperature (SST), nutrient concentrations, salinity, and sea ice (presence). In this study we present a new set of surface sediment samples (n=66) from around Antarctica, doubling the number of Antarctic-proximal samples to 100 (dataset wsi_100) and increasing the total number of Southern Hemisphere samples to 655 (dataset sh_655). Additionally, we use modelled ocean conditions and apply Lagrangian techniques to all Southern Hemisphere sample stations to quantify and evaluate the influence of lateral transport on the sinking trajectory of microplankton and, with that, to the inferred ocean conditions. k-means cluster analysis on the wsi_100 dataset demonstrates the strong affinity of Selenopemphix antarctica with sea-ice presence and of Islandinium spp. with low-salinity conditions. For the entire Southern Hemisphere, the k-means cluster analysis identifies nine clusters with a characteristic assemblage. In most clusters a single dinocyst species dominates the assemblage. These clusters correspond to well-defined oceanic conditions in specific Southern Ocean zones or along the ocean fronts. We find that, when lateral transport is predominantly zonal, the environmental parameters inferred from the sea floor assemblages mostly correspond to those of the overlying ocean surface. In this case, the transport factor can thus be neglected and will not represent a bias in the reconstructions. Yet, for some individual sites, e.g. deep-water sites or sites under strong-current regimes, lateral transport can play a large role. The results of our study further constrain ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Southern Ocean Niedersächsisches Online-Archiv NOA Antarctic Southern Ocean Journal of Micropalaeontology 42 1 35 56 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Thöle, Lena Mareike Nooteboom, Peter Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter Kristian An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
topic_facet |
article Verlagsveröffentlichung |
description |
Dinoflagellate cyst assemblages present a valuable proxy to infer paleoceanographic conditions, yet factors influencing geographic distributions of species remain largely unknown, especially in the Southern Ocean. Strong lateral transport, sea-ice dynamics, and a sparse and uneven geographic distribution of surface sediment samples have limited the use of dinocyst assemblages as a quantitative proxy for paleo-environmental conditions such as sea surface temperature (SST), nutrient concentrations, salinity, and sea ice (presence). In this study we present a new set of surface sediment samples (n=66) from around Antarctica, doubling the number of Antarctic-proximal samples to 100 (dataset wsi_100) and increasing the total number of Southern Hemisphere samples to 655 (dataset sh_655). Additionally, we use modelled ocean conditions and apply Lagrangian techniques to all Southern Hemisphere sample stations to quantify and evaluate the influence of lateral transport on the sinking trajectory of microplankton and, with that, to the inferred ocean conditions. k-means cluster analysis on the wsi_100 dataset demonstrates the strong affinity of Selenopemphix antarctica with sea-ice presence and of Islandinium spp. with low-salinity conditions. For the entire Southern Hemisphere, the k-means cluster analysis identifies nine clusters with a characteristic assemblage. In most clusters a single dinocyst species dominates the assemblage. These clusters correspond to well-defined oceanic conditions in specific Southern Ocean zones or along the ocean fronts. We find that, when lateral transport is predominantly zonal, the environmental parameters inferred from the sea floor assemblages mostly correspond to those of the overlying ocean surface. In this case, the transport factor can thus be neglected and will not represent a bias in the reconstructions. Yet, for some individual sites, e.g. deep-water sites or sites under strong-current regimes, lateral transport can play a large role. The results of our study further constrain ... |
format |
Article in Journal/Newspaper |
author |
Thöle, Lena Mareike Nooteboom, Peter Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter Kristian |
author_facet |
Thöle, Lena Mareike Nooteboom, Peter Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter Kristian |
author_sort |
Thöle, Lena Mareike |
title |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_short |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_full |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_fullStr |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_full_unstemmed |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_sort |
expanded database of southern hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/jm-42-35-2023 https://noa.gwlb.de/receive/cop_mods_00066831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065302/jm-42-35-2023.pdf https://jm.copernicus.org/articles/42/35/2023/jm-42-35-2023.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_relation |
Journal of Micropalaeontology -- http://www.bibliothek.uni-regensburg.de/ezeit/?2053393 -- https://www.j-micropalaeontol.net/volumes.html -- http://jm.geoscienceworld.org/ -- 2041-4978 https://doi.org/10.5194/jm-42-35-2023 https://noa.gwlb.de/receive/cop_mods_00066831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065302/jm-42-35-2023.pdf https://jm.copernicus.org/articles/42/35/2023/jm-42-35-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/jm-42-35-2023 |
container_title |
Journal of Micropalaeontology |
container_volume |
42 |
container_issue |
1 |
container_start_page |
35 |
op_container_end_page |
56 |
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1769003076701650944 |