Ecoregionalisation of the Southern Ocean Using Radiolarians
The Southern Ocean is an important region for identifying ecoregions, both to assist in conservation efforts as well as for paleoecological studies. In this paper we use the Southern Ocean Radiolarian Dataset (SORAD), a compilation of surface sediment radiolarian census data, to determine radiolaria...
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crfrontiers:10.3389/fmars.2022.829676 2024-10-13T14:10:44+00:00 Ecoregionalisation of the Southern Ocean Using Radiolarians Lowe, Vikki Cortese, Giuseppe Lawler, Kelly-Anne Civel-Mazens, Matthieu Bostock, Helen C. 2022 http://dx.doi.org/10.3389/fmars.2022.829676 https://www.frontiersin.org/articles/10.3389/fmars.2022.829676/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 9 ISSN 2296-7745 journal-article 2022 crfrontiers https://doi.org/10.3389/fmars.2022.829676 2024-09-17T04:13:11Z The Southern Ocean is an important region for identifying ecoregions, both to assist in conservation efforts as well as for paleoecological studies. In this paper we use the Southern Ocean Radiolarian Dataset (SORAD), a compilation of surface sediment radiolarian census data, to determine radiolarian ecoregions throughout the Southern Ocean within the Atlantic, Indian and Southwest Pacific Sectors. The distribution of radiolarian species is explored using the unconstrained non-Metric Multidimensional Scaling to identify gradients in species assemblage variability, as well as distinct and sharp changes in assemblage composition. Ecoregions are assigned to groups of sites using Multivariate Regression Tree analysis, and environmental variables are assessed for their explanatory power. Radiolarian distribution was found to be heterogeneous throughout the Southern Ocean, with each Sector hosting a unique group of radiolarian ecoregions. A total of 6 ecoregions were identified for the Atlantic Sector, 8 for the Indian Sector and 6 for the Southwest Pacific Sector. Ecoregions were generally latitudinally distributed, but also appear to be influenced by significant oceanographic features, such as plateaux and islands, large eddy fields, hydrological fronts and sea ice. This study highlights the need for further exploration of radiolarian ecology, and for caution when using radiolarian assemblage variability in paleo-environmental studies. Article in Journal/Newspaper Sea ice Southern Ocean Frontiers (Publisher) Indian Pacific Southern Ocean Frontiers in Marine Science 9 |
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The Southern Ocean is an important region for identifying ecoregions, both to assist in conservation efforts as well as for paleoecological studies. In this paper we use the Southern Ocean Radiolarian Dataset (SORAD), a compilation of surface sediment radiolarian census data, to determine radiolarian ecoregions throughout the Southern Ocean within the Atlantic, Indian and Southwest Pacific Sectors. The distribution of radiolarian species is explored using the unconstrained non-Metric Multidimensional Scaling to identify gradients in species assemblage variability, as well as distinct and sharp changes in assemblage composition. Ecoregions are assigned to groups of sites using Multivariate Regression Tree analysis, and environmental variables are assessed for their explanatory power. Radiolarian distribution was found to be heterogeneous throughout the Southern Ocean, with each Sector hosting a unique group of radiolarian ecoregions. A total of 6 ecoregions were identified for the Atlantic Sector, 8 for the Indian Sector and 6 for the Southwest Pacific Sector. Ecoregions were generally latitudinally distributed, but also appear to be influenced by significant oceanographic features, such as plateaux and islands, large eddy fields, hydrological fronts and sea ice. This study highlights the need for further exploration of radiolarian ecology, and for caution when using radiolarian assemblage variability in paleo-environmental studies. |
format |
Article in Journal/Newspaper |
author |
Lowe, Vikki Cortese, Giuseppe Lawler, Kelly-Anne Civel-Mazens, Matthieu Bostock, Helen C. |
spellingShingle |
Lowe, Vikki Cortese, Giuseppe Lawler, Kelly-Anne Civel-Mazens, Matthieu Bostock, Helen C. Ecoregionalisation of the Southern Ocean Using Radiolarians |
author_facet |
Lowe, Vikki Cortese, Giuseppe Lawler, Kelly-Anne Civel-Mazens, Matthieu Bostock, Helen C. |
author_sort |
Lowe, Vikki |
title |
Ecoregionalisation of the Southern Ocean Using Radiolarians |
title_short |
Ecoregionalisation of the Southern Ocean Using Radiolarians |
title_full |
Ecoregionalisation of the Southern Ocean Using Radiolarians |
title_fullStr |
Ecoregionalisation of the Southern Ocean Using Radiolarians |
title_full_unstemmed |
Ecoregionalisation of the Southern Ocean Using Radiolarians |
title_sort |
ecoregionalisation of the southern ocean using radiolarians |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fmars.2022.829676 https://www.frontiersin.org/articles/10.3389/fmars.2022.829676/full |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
Frontiers in Marine Science volume 9 ISSN 2296-7745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2022.829676 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1812818198552117248 |