Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2
We assessed the responses of solitary cells of Arctic Phaeocystis pouchetii grown under a matrix of temperature (2°C vs. 6°C), light intensity (55 vs. 160 μmol photons m−2 s−1) and pCO2 (400 vs. 1000 μatm CO2, i.e., 40.5 vs. 101.3 Pa). Next to acclimation parameters (growth rates, particulate and di...
Published in: | Limnology and Oceanography |
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Online Access: | https://epic.awi.de/id/eprint/58498/ https://epic.awi.de/id/eprint/58498/1/Rokitta_et_al_2023_L%26O.pdf https://doi.org/10.1002/lno.12460 https://hdl.handle.net/10013/epic.7110b7e2-6df1-41cc-84cc-efa81021bba3 |
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ftawi:oai:epic.awi.de:58498 2024-04-21T07:54:16+00:00 Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 Rokitta, Sebastian D Grossmann, Christian H Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva‐Maria Rost, Björn 2023-12 application/pdf https://epic.awi.de/id/eprint/58498/ https://epic.awi.de/id/eprint/58498/1/Rokitta_et_al_2023_L%26O.pdf https://doi.org/10.1002/lno.12460 https://hdl.handle.net/10013/epic.7110b7e2-6df1-41cc-84cc-efa81021bba3 unknown Wiley https://epic.awi.de/id/eprint/58498/1/Rokitta_et_al_2023_L%26O.pdf Rokitta, S. D. orcid:0000-0002-7540-9033 , Grossmann, C. H. , Werner, E. , Moye, J. , Castellani, G. , Nöthig, E. orcid:0000-0002-7527-7827 and Rost, B. orcid:0000-0001-5452-5505 (2023) Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 , Limnology and Oceanography, 68 (12), pp. 2789-2799 . doi:10.1002/lno.12460 <https://doi.org/10.1002/lno.12460> , hdl:10013/epic.7110b7e2-6df1-41cc-84cc-efa81021bba3 EPIC3Limnology and Oceanography, Wiley, 68(12), pp. 2789-2799, ISSN: 0024-3590 Article isiRev 2023 ftawi https://doi.org/10.1002/lno.12460 2024-03-27T15:17:23Z We assessed the responses of solitary cells of Arctic Phaeocystis pouchetii grown under a matrix of temperature (2°C vs. 6°C), light intensity (55 vs. 160 μmol photons m−2 s−1) and pCO2 (400 vs. 1000 μatm CO2, i.e., 40.5 vs. 101.3 Pa). Next to acclimation parameters (growth rates, particulate and dissolved organic C and N, Chlorophyll a content), we measured physiological processes in vivo (electron transport rates and net photosynthesis) using fast-repetition rate fluorometry and membrane-inlet mass spectrometry. Within the applied driver ranges, elevated temperature had the most pronounced impacts, significantly increasing growth, elemental quotas and photosynthetic performance. Light stimulations manifested more prominently under 6°C, underlining temperature's role as a “master-variable”. pCO2 was the least effective driver, exerting mostly insignificant effects. The obtained data were used for a simplistic upscaling simulation to investigate potential changes in P. pouchetii's bloom dynamics in the Fram Strait with increasing temperatures over the 21st century. Although solitary cells might not be fully representative of colonial cells commonly observed in the field, our results suggest that global warming accelerates bloom dynamics, with earlier onsets of blooms and higher peak biomasses. Such a temperature-induced acceleration in the phenology of Phaeocystis and likely other Arctic phytoplankton might cause temporal mismatches, e.g., with the development of grazers, and therefore substantially affect the biogeochemistry and ecology of the Arctic. Article in Journal/Newspaper Arctic Fram Strait Global warming Phytoplankton Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Limnology and Oceanography 68 12 2789 2799 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
We assessed the responses of solitary cells of Arctic Phaeocystis pouchetii grown under a matrix of temperature (2°C vs. 6°C), light intensity (55 vs. 160 μmol photons m−2 s−1) and pCO2 (400 vs. 1000 μatm CO2, i.e., 40.5 vs. 101.3 Pa). Next to acclimation parameters (growth rates, particulate and dissolved organic C and N, Chlorophyll a content), we measured physiological processes in vivo (electron transport rates and net photosynthesis) using fast-repetition rate fluorometry and membrane-inlet mass spectrometry. Within the applied driver ranges, elevated temperature had the most pronounced impacts, significantly increasing growth, elemental quotas and photosynthetic performance. Light stimulations manifested more prominently under 6°C, underlining temperature's role as a “master-variable”. pCO2 was the least effective driver, exerting mostly insignificant effects. The obtained data were used for a simplistic upscaling simulation to investigate potential changes in P. pouchetii's bloom dynamics in the Fram Strait with increasing temperatures over the 21st century. Although solitary cells might not be fully representative of colonial cells commonly observed in the field, our results suggest that global warming accelerates bloom dynamics, with earlier onsets of blooms and higher peak biomasses. Such a temperature-induced acceleration in the phenology of Phaeocystis and likely other Arctic phytoplankton might cause temporal mismatches, e.g., with the development of grazers, and therefore substantially affect the biogeochemistry and ecology of the Arctic. |
format |
Article in Journal/Newspaper |
author |
Rokitta, Sebastian D Grossmann, Christian H Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva‐Maria Rost, Björn |
spellingShingle |
Rokitta, Sebastian D Grossmann, Christian H Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva‐Maria Rost, Björn Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 |
author_facet |
Rokitta, Sebastian D Grossmann, Christian H Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva‐Maria Rost, Björn |
author_sort |
Rokitta, Sebastian D |
title |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 |
title_short |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 |
title_full |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 |
title_fullStr |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 |
title_full_unstemmed |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 |
title_sort |
future warming stimulates growth and photosynthesis in an arctic microalga more strongly than changes in light intensity or pco2 |
publisher |
Wiley |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/58498/ https://epic.awi.de/id/eprint/58498/1/Rokitta_et_al_2023_L%26O.pdf https://doi.org/10.1002/lno.12460 https://hdl.handle.net/10013/epic.7110b7e2-6df1-41cc-84cc-efa81021bba3 |
genre |
Arctic Fram Strait Global warming Phytoplankton |
genre_facet |
Arctic Fram Strait Global warming Phytoplankton |
op_source |
EPIC3Limnology and Oceanography, Wiley, 68(12), pp. 2789-2799, ISSN: 0024-3590 |
op_relation |
https://epic.awi.de/id/eprint/58498/1/Rokitta_et_al_2023_L%26O.pdf Rokitta, S. D. orcid:0000-0002-7540-9033 , Grossmann, C. H. , Werner, E. , Moye, J. , Castellani, G. , Nöthig, E. orcid:0000-0002-7527-7827 and Rost, B. orcid:0000-0001-5452-5505 (2023) Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO2 , Limnology and Oceanography, 68 (12), pp. 2789-2799 . doi:10.1002/lno.12460 <https://doi.org/10.1002/lno.12460> , hdl:10013/epic.7110b7e2-6df1-41cc-84cc-efa81021bba3 |
op_doi |
https://doi.org/10.1002/lno.12460 |
container_title |
Limnology and Oceanography |
container_volume |
68 |
container_issue |
12 |
container_start_page |
2789 |
op_container_end_page |
2799 |
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1796936943293956096 |