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...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Mattia Greco [verfasserIn] Julie Meilland [verfasserIn] Kasia Zamelczyk [verfasserIn] Tine L. Rasmussen [verfasserIn] Michal Kucera [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	planktonic foraminifera meltwater events salinity laboratory observations

Übergeordnetes Werk:	In: Polar Research - Norwegian Polar Institute, 2011, 39(2020), 0, Seite 8
Übergeordnetes Werk:	volume:39 ; year:2020 ; number:0 ; pages:8

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.33265/polar.v39.3842

Katalog-ID:	DOAJ026510200

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authorswithroles_txt_mv	Mattia Greco @@aut@@ Julie Meilland @@aut@@ Kasia Zamelczyk @@aut@@ Tine L. Rasmussen @@aut@@ Michal Kucera @@aut@@
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callnumber-first	G - Geography, Anthropology, Recreation
author	Mattia Greco
spellingShingle	Mattia Greco misc GE1-350 misc GC1-1581 misc planktonic foraminifera misc meltwater events misc salinity misc laboratory observations misc Environmental sciences misc Oceanography The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta
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topic_title	GE1-350 GC1-1581 The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta planktonic foraminifera meltwater events salinity laboratory observations
topic	misc GE1-350 misc GC1-1581 misc planktonic foraminifera misc meltwater events misc salinity misc laboratory observations misc Environmental sciences misc Oceanography
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title	The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta
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title_full	The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta
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title_sort	effect of an experimental decrease in salinity on the viability of the subarctic planktonic foraminifera neogloboquadrina incompta
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title_auth	The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta
abstract	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 species Neogloboquadrina incompta collected 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 of N. incompta, indicating a range of salinity that could be plausibly expected to be recorded in the chemistry of fossil shells of the species.
abstractGer	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 species Neogloboquadrina incompta collected 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 of N. incompta, indicating a range of salinity that could be plausibly expected to be recorded in the chemistry of fossil shells of the species.
abstract_unstemmed	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 species Neogloboquadrina incompta collected 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 of N. incompta, indicating a range of salinity that could be plausibly expected to be recorded in the chemistry of fossil shells of the species.
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title_short	The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta
url	https://doi.org/10.33265/polar.v39.3842 https://doaj.org/article/d492000b82064e50a8e0639a9ca5cb16 https://polarresearch.net/index.php/polar/article/view/3842/11152 https://doaj.org/toc/1751-8369
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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. 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The effect of an experimental decrease in salinity on the viability of the Subarctic planktonic foraminifera Neogloboquadrina incompta

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