The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta
Chemical signatures in the calcite of shells of polar and subpolar planktonic foraminifera have been frequently used to trace and quantify past meltwater discharge events. This approach assumes that the foraminifera can tolerate low salinity under extended periods. To obtain a first experimental con...
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Norwegian Polar Institute
2020
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ftjpolarres:oai:journals.openacademia.net:article/3842 2023-05-15T17:47:06+02:00 The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta Greco, Mattia Meilland, Julie Zamelczyk, Kasia Rasmussen, Tine L. Kucera, Michal 2020-08-27 text/html application/pdf application/epub+zip text/xml https://polarresearch.net/index.php/polar/article/view/3842 https://doi.org/10.33265/polar.v39.3842 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3842/11153 https://polarresearch.net/index.php/polar/article/view/3842/11152 https://polarresearch.net/index.php/polar/article/view/3842/11154 https://polarresearch.net/index.php/polar/article/view/3842/11155 https://polarresearch.net/index.php/polar/article/view/3842 doi:10.33265/polar.v39.3842 Copyright (c) 2020 Mattia Greco, Julie Meilland, Kasia Zamelczyk, Tine L. Rasmussen, Michal Kucera https://creativecommons.org/licenses/by-nd/4.0 CC-BY-ND Polar Research; Vol 39 (2020) 1751-8369 Planktonic foraminifera meltwater events salinity laboratory observations info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftjpolarres https://doi.org/10.33265/polar.v39.3842 2021-11-11T19:14:21Z Chemical signatures in the calcite of shells of polar and subpolar planktonic foraminifera have been frequently used to trace and quantify past meltwater discharge events. This approach assumes that the foraminifera can tolerate low salinity under extended periods. To obtain a first experimental constraint on salinity tolerance of Subarctic foraminifera, we carried out a culturing experiment with specimens of the subpolar speciesNeogloboquadrina incomptacollected in the northern Norwegian Sea off Tromsø in October 2018. The foraminifera were exposed to a gradient of salinities between 35 and 25 PSU. Survival was monitored over 26 days by measuring the extent of the rhizopodial network. Although chamber growth only occurred in one of the observed specimens, likely due to the largely unknown dietary preference of the species, we observed a strong differential rhizopodial activity pattern along the gradient. The highest rhizopodial activity occurred at salinity between 35 and 31 PSU. The species is clearly able to survive long-term exposure to salinities as low as 28, but no rhizopodial activity and signs of cytoplasm degradation were observed in all specimens exposed to 25 PSU. These preliminary observations provide the first direct evidence for the salinity tolerance ofN. incompta, indicating a range of salinity that could be plausibly expected to be recorded in the chemistry of fossil shells of the species. Article in Journal/Newspaper Norwegian Sea Planktonic foraminifera Polar Research Subarctic Tromsø Polar Research (E-Journal) Norwegian Sea Tromsø Polar Research 39 0 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Planktonic foraminifera meltwater events salinity laboratory observations |
spellingShingle |
Planktonic foraminifera meltwater events salinity laboratory observations Greco, Mattia Meilland, Julie Zamelczyk, Kasia Rasmussen, Tine L. Kucera, Michal The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta |
topic_facet |
Planktonic foraminifera meltwater events salinity laboratory observations |
description |
Chemical signatures in the calcite of shells of polar and subpolar planktonic foraminifera have been frequently used to trace and quantify past meltwater discharge events. This approach assumes that the foraminifera can tolerate low salinity under extended periods. To obtain a first experimental constraint on salinity tolerance of Subarctic foraminifera, we carried out a culturing experiment with specimens of the subpolar speciesNeogloboquadrina incomptacollected in the northern Norwegian Sea off Tromsø in October 2018. The foraminifera were exposed to a gradient of salinities between 35 and 25 PSU. Survival was monitored over 26 days by measuring the extent of the rhizopodial network. Although chamber growth only occurred in one of the observed specimens, likely due to the largely unknown dietary preference of the species, we observed a strong differential rhizopodial activity pattern along the gradient. The highest rhizopodial activity occurred at salinity between 35 and 31 PSU. The species is clearly able to survive long-term exposure to salinities as low as 28, but no rhizopodial activity and signs of cytoplasm degradation were observed in all specimens exposed to 25 PSU. These preliminary observations provide the first direct evidence for the salinity tolerance ofN. incompta, indicating a range of salinity that could be plausibly expected to be recorded in the chemistry of fossil shells of the species. |
format |
Article in Journal/Newspaper |
author |
Greco, Mattia Meilland, Julie Zamelczyk, Kasia Rasmussen, Tine L. Kucera, Michal |
author_facet |
Greco, Mattia Meilland, Julie Zamelczyk, Kasia Rasmussen, Tine L. Kucera, Michal |
author_sort |
Greco, Mattia |
title |
The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta |
title_short |
The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta |
title_full |
The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta |
title_fullStr |
The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta |
title_full_unstemmed |
The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta |
title_sort |
effect of an experimental decrease in salinity on the viability of the subarctic planktonic foraminifera neogloboquadrina incompta |
publisher |
Norwegian Polar Institute |
publishDate |
2020 |
url |
https://polarresearch.net/index.php/polar/article/view/3842 https://doi.org/10.33265/polar.v39.3842 |
geographic |
Norwegian Sea Tromsø |
geographic_facet |
Norwegian Sea Tromsø |
genre |
Norwegian Sea Planktonic foraminifera Polar Research Subarctic Tromsø |
genre_facet |
Norwegian Sea Planktonic foraminifera Polar Research Subarctic Tromsø |
op_source |
Polar Research; Vol 39 (2020) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3842/11153 https://polarresearch.net/index.php/polar/article/view/3842/11152 https://polarresearch.net/index.php/polar/article/view/3842/11154 https://polarresearch.net/index.php/polar/article/view/3842/11155 https://polarresearch.net/index.php/polar/article/view/3842 doi:10.33265/polar.v39.3842 |
op_rights |
Copyright (c) 2020 Mattia Greco, Julie Meilland, Kasia Zamelczyk, Tine L. Rasmussen, Michal Kucera https://creativecommons.org/licenses/by-nd/4.0 |
op_rightsnorm |
CC-BY-ND |
op_doi |
https://doi.org/10.33265/polar.v39.3842 |
container_title |
Polar Research |
container_volume |
39 |
container_issue |
0 |
_version_ |
1766151416287592448 |