Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene
Analysis of compositional changes in fossil organic-walled dinoflagellate cyst (dinocysts) assemblages is a widely used tool for the quantitative reconstruction of past environmental parameters. This approach assumes that the assemblage composition is significantly related to the reconstructed envir...
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ftdoajarticles:oai:doaj.org/article:d4a10e873ef04807ae67ba7be8726f41 2023-11-12T04:14:49+01:00 Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene S. Hohmann M. Kucera A. de Vernal 2023-10-01T00:00:00Z https://doi.org/10.5194/cp-19-2027-2023 https://doaj.org/article/d4a10e873ef04807ae67ba7be8726f41 EN eng Copernicus Publications https://cp.copernicus.org/articles/19/2027/2023/cp-19-2027-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-2027-2023 1814-9324 1814-9332 https://doaj.org/article/d4a10e873ef04807ae67ba7be8726f41 Climate of the Past, Vol 19, Pp 2027-2051 (2023) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.5194/cp-19-2027-2023 2023-10-29T00:38:27Z Analysis of compositional changes in fossil organic-walled dinoflagellate cyst (dinocysts) assemblages is a widely used tool for the quantitative reconstruction of past environmental parameters. This approach assumes that the assemblage composition is significantly related to the reconstructed environmental parameter, which requires an independent correlation between the assemblage and the variable, meaning that the variable explains a dimension of the assemblage variance that is not also explained by other parameters. Theoretically, dinocyst assemblages can be used to reconstruct multiple environmental variables. However, there is evidence that primary and subordinate drivers for assemblage compositions regionally differ, and it remains unclear whether a significant relationship to specific parameters in the present ocean always implies that this relationship is significant in fossil assemblages, questioning if past changes in these multiple parameters can be reconstructed simultaneously from fossil assemblages. Here, we analysed a local subset of the Northern Hemisphere dinocyst calibration dataset ( n =1968 ), including samples from the Baffin Bay area ( n =421 ), and evaluated the benefits of a local versus a more regional or global calibration for the environmental reconstruction of Baffin Bay oceanography during the Holocene. We determined the dimensionality of the dinocyst ecological response and identified environmental drivers in the Baffin Bay area for the modern dataset. We analysed four existing Holocene records along a north–south transect in the area and evaluated the statistical significance of downcore reconstructions by applying the local and global datasets with different techniques: the modern analogue technique (MAT), the weighted average partial least square (WA-PLS) and maximum likelihood (ML). We evaluated reconstructions tested as significant in light of the existing state of knowledge about West Greenland's Holocene palaeoceanography. Our analyses imply that present-day and Holocene ... Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Subarctic Directory of Open Access Journals: DOAJ Articles Climate of the Past 19 10 2027 2051 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 S. Hohmann M. Kucera A. de Vernal Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Analysis of compositional changes in fossil organic-walled dinoflagellate cyst (dinocysts) assemblages is a widely used tool for the quantitative reconstruction of past environmental parameters. This approach assumes that the assemblage composition is significantly related to the reconstructed environmental parameter, which requires an independent correlation between the assemblage and the variable, meaning that the variable explains a dimension of the assemblage variance that is not also explained by other parameters. Theoretically, dinocyst assemblages can be used to reconstruct multiple environmental variables. However, there is evidence that primary and subordinate drivers for assemblage compositions regionally differ, and it remains unclear whether a significant relationship to specific parameters in the present ocean always implies that this relationship is significant in fossil assemblages, questioning if past changes in these multiple parameters can be reconstructed simultaneously from fossil assemblages. Here, we analysed a local subset of the Northern Hemisphere dinocyst calibration dataset ( n =1968 ), including samples from the Baffin Bay area ( n =421 ), and evaluated the benefits of a local versus a more regional or global calibration for the environmental reconstruction of Baffin Bay oceanography during the Holocene. We determined the dimensionality of the dinocyst ecological response and identified environmental drivers in the Baffin Bay area for the modern dataset. We analysed four existing Holocene records along a north–south transect in the area and evaluated the statistical significance of downcore reconstructions by applying the local and global datasets with different techniques: the modern analogue technique (MAT), the weighted average partial least square (WA-PLS) and maximum likelihood (ML). We evaluated reconstructions tested as significant in light of the existing state of knowledge about West Greenland's Holocene palaeoceanography. Our analyses imply that present-day and Holocene ... |
format |
Article in Journal/Newspaper |
author |
S. Hohmann M. Kucera A. de Vernal |
author_facet |
S. Hohmann M. Kucera A. de Vernal |
author_sort |
S. Hohmann |
title |
Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene |
title_short |
Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene |
title_full |
Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene |
title_fullStr |
Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene |
title_full_unstemmed |
Disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the Holocene |
title_sort |
disentangling environmental drivers of subarctic dinocyst assemblage compositional change during the holocene |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/cp-19-2027-2023 https://doaj.org/article/d4a10e873ef04807ae67ba7be8726f41 |
genre |
Baffin Bay Baffin Bay Baffin Subarctic |
genre_facet |
Baffin Bay Baffin Bay Baffin Subarctic |
op_source |
Climate of the Past, Vol 19, Pp 2027-2051 (2023) |
op_relation |
https://cp.copernicus.org/articles/19/2027/2023/cp-19-2027-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-2027-2023 1814-9324 1814-9332 https://doaj.org/article/d4a10e873ef04807ae67ba7be8726f41 |
op_doi |
https://doi.org/10.5194/cp-19-2027-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
10 |
container_start_page |
2027 |
op_container_end_page |
2051 |
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1782332371732791296 |