Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B
A total of 35 samples from the late-middle Eocene to earliest Oligocene (643.73-520.88 mbsf) were analysed for their pollen and spore content. Slides were analysed using a Leica DM500 and Leica DM2000 transmitted light microscopes at 200x and 1000x magnification. Where possible, counts of 300 (exclu...
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ftdatacite:10.1594/pangaea.936435 2023-05-15T13:45:14+02:00 Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B Thompson, Nick Salzmann, Ulrich López-Quirós, Adrián Bijl, Peter K Hoem, Frida Etourneau, Johan Sicre, Marie-Alexandrine Roignant, Sabine Hocking, Emma Amoo, Michael Escutia, Carlota 2021 application/zip https://dx.doi.org/10.1594/pangaea.936435 https://doi.pangaea.de/10.1594/PANGAEA.936435 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.5194/cp-2021-84 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Antarctica Drake Passage Eocene-Oligocene Transition palynology Collection of Datasets article Collection 2021 ftdatacite https://doi.org/10.1594/pangaea.936435 https://doi.org/10.5194/cp-2021-84 2022-02-09T14:14:30Z A total of 35 samples from the late-middle Eocene to earliest Oligocene (643.73-520.88 mbsf) were analysed for their pollen and spore content. Slides were analysed using a Leica DM500 and Leica DM2000 transmitted light microscopes at 200x and 1000x magnification. Where possible, counts of 300 (excluding reworked grains) sporomorphs were made. Only samples containing 50 or more in situ sporomorphs were used for further analysis and evaluation. Sporomorph diversity was measured using both the Shannon–Wiener index and the observed number of taxa. A rarefaction method for sums of ≥50 and ≥100 grains was applied, so that the effect caused by differences in the sample size may be removed allowing the estimation of the number of sporomorph species at a constant sample size. Detrended Correspondence Analysis (DCA) was performed, with downweighting of rare species by removing pollen types whose representation is <5%. Estimates for terrestrial mean annual temperature (MAT), mean annual precipitation (MAP), warmest month mean temperature (WMMT) and coldest month mean temperature (CMMT) were obtained using the NLR approach in conjunction with the Probability Density Function (PDF) method. Article in Journal/Newspaper Antarc* Antarctica Drake Passage DataCite Metadata Store (German National Library of Science and Technology) Drake Passage |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Antarctica Drake Passage Eocene-Oligocene Transition palynology |
spellingShingle |
Antarctica Drake Passage Eocene-Oligocene Transition palynology Thompson, Nick Salzmann, Ulrich López-Quirós, Adrián Bijl, Peter K Hoem, Frida Etourneau, Johan Sicre, Marie-Alexandrine Roignant, Sabine Hocking, Emma Amoo, Michael Escutia, Carlota Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B |
topic_facet |
Antarctica Drake Passage Eocene-Oligocene Transition palynology |
description |
A total of 35 samples from the late-middle Eocene to earliest Oligocene (643.73-520.88 mbsf) were analysed for their pollen and spore content. Slides were analysed using a Leica DM500 and Leica DM2000 transmitted light microscopes at 200x and 1000x magnification. Where possible, counts of 300 (excluding reworked grains) sporomorphs were made. Only samples containing 50 or more in situ sporomorphs were used for further analysis and evaluation. Sporomorph diversity was measured using both the Shannon–Wiener index and the observed number of taxa. A rarefaction method for sums of ≥50 and ≥100 grains was applied, so that the effect caused by differences in the sample size may be removed allowing the estimation of the number of sporomorph species at a constant sample size. Detrended Correspondence Analysis (DCA) was performed, with downweighting of rare species by removing pollen types whose representation is <5%. Estimates for terrestrial mean annual temperature (MAT), mean annual precipitation (MAP), warmest month mean temperature (WMMT) and coldest month mean temperature (CMMT) were obtained using the NLR approach in conjunction with the Probability Density Function (PDF) method. |
format |
Article in Journal/Newspaper |
author |
Thompson, Nick Salzmann, Ulrich López-Quirós, Adrián Bijl, Peter K Hoem, Frida Etourneau, Johan Sicre, Marie-Alexandrine Roignant, Sabine Hocking, Emma Amoo, Michael Escutia, Carlota |
author_facet |
Thompson, Nick Salzmann, Ulrich López-Quirós, Adrián Bijl, Peter K Hoem, Frida Etourneau, Johan Sicre, Marie-Alexandrine Roignant, Sabine Hocking, Emma Amoo, Michael Escutia, Carlota |
author_sort |
Thompson, Nick |
title |
Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B |
title_short |
Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B |
title_full |
Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B |
title_fullStr |
Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B |
title_full_unstemmed |
Sporomorph counts, diversity, DCA and climate estimate calculations from ODP Hole 113-696B |
title_sort |
sporomorph counts, diversity, dca and climate estimate calculations from odp hole 113-696b |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2021 |
url |
https://dx.doi.org/10.1594/pangaea.936435 https://doi.pangaea.de/10.1594/PANGAEA.936435 |
geographic |
Drake Passage |
geographic_facet |
Drake Passage |
genre |
Antarc* Antarctica Drake Passage |
genre_facet |
Antarc* Antarctica Drake Passage |
op_relation |
https://dx.doi.org/10.5194/cp-2021-84 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.936435 https://doi.org/10.5194/cp-2021-84 |
_version_ |
1766217573569921024 |