The impact of essential climate variables on respiration rates in subpolar and polar planktonic foraminifera.
Saved in:
| Title: | The impact of essential climate variables on respiration rates in subpolar and polar planktonic foraminifera. |
|---|---|
| Authors: | Armitage, Diane V.1 (AUTHOR) d.armitage1@universityofgalway.ie, Glock, Nicolaas2 (AUTHOR), Weiss, Thomas L.1,3,4 (AUTHOR), Ezat, Mohamed M.5 (AUTHOR), Westgård, Adele5 (AUTHOR), Sykes, Freya E.5 (AUTHOR), Meilland, Julie6 (AUTHOR), de la Vega, Elwyn1 (AUTHOR), Fabbrini, Alessio1 (AUTHOR), Babila, Tali L.7 (AUTHOR), Morley, Audrey1,3 (AUTHOR) audrey.morley@universityofgalway.ie |
| Source: | Biogeosciences. 2026, Vol. 23 Issue 10, p3655-3673. 19p. |
| Subject Terms: | *Foraminifera, *Temperature effect, *Oxygen consumption, *Cell size, *Climatology, *Protista |
| Abstract: | This study investigates the impact of Essential Climate Variables (ECVs) on the respiration rate of polar planktonic foraminifera Neogloboquadrina pachyderma and subpolar Turborotalita quinqueloba and Neogloboquadrina incompta to advance our understanding of foraminifera physiology and geochemical proxy interpretation for species living in understudied subpolar and polar environments. Respiration rates were measured on a total of 158 specimens collected during two field campaigns to the Nordic Seas. To size-normalise respiration rates, we measured cavity volume and maximum diameter using x-ray microcomputed tomography (micro-CT) (c3avity volume = (0.56 (max Ø) - 0.38)). Our results show that the physiological response of foraminifera sharing overlapping environments is diverse, with N. pachyderma exhibiting remarkable stability over large gradients in temperature, salinity, carbonate chemistry, dissolved oxygen and nutrients. Conversely, N. incompta and T. quinqueloba have a much stronger thermal response. The difference between species is best described by their respective Q10 (the factor by which the rate of respiration changes with a 10 °C increase in temperature) values of 1.48 for N. pachyderma and 3.69 and 4.43 for N. incompta and T. quinqueloba, respectively. We also find a significant relationship between biovolume and respiration rate when rates are normalized to 4 °C (log10 Rbiovolume=0.40 (log10 biovolume) - 0.80)) for all three species analysed here, which is consistent with marine protists globally. We conclude that respiration is unlikely to influence geochemical proxies and therefore past climate reconstructions derived from N. pachyderma, however, this may not apply to N. incompta and T. quinqueloba. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | This study investigates the impact of Essential Climate Variables (ECVs) on the respiration rate of polar planktonic foraminifera Neogloboquadrina pachyderma and subpolar Turborotalita quinqueloba and Neogloboquadrina incompta to advance our understanding of foraminifera physiology and geochemical proxy interpretation for species living in understudied subpolar and polar environments. Respiration rates were measured on a total of 158 specimens collected during two field campaigns to the Nordic Seas. To size-normalise respiration rates, we measured cavity volume and maximum diameter using x-ray microcomputed tomography (micro-CT) (c3avity volume = (0.56 (max Ø) - 0.38)). Our results show that the physiological response of foraminifera sharing overlapping environments is diverse, with N. pachyderma exhibiting remarkable stability over large gradients in temperature, salinity, carbonate chemistry, dissolved oxygen and nutrients. Conversely, N. incompta and T. quinqueloba have a much stronger thermal response. The difference between species is best described by their respective Q10 (the factor by which the rate of respiration changes with a 10 °C increase in temperature) values of 1.48 for N. pachyderma and 3.69 and 4.43 for N. incompta and T. quinqueloba, respectively. We also find a significant relationship between biovolume and respiration rate when rates are normalized to 4 °C (log10 Rbiovolume=0.40 (log10 biovolume) - 0.80)) for all three species analysed here, which is consistent with marine protists globally. We conclude that respiration is unlikely to influence geochemical proxies and therefore past climate reconstructions derived from N. pachyderma, however, this may not apply to N. incompta and T. quinqueloba. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 17264170 |
| DOI: | 10.5194/bg-23-3655-2026 |
