Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm)
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). Next to acclimation parameters (growth rates, particulate and dissolved organic C and N, chlo...
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Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI) Center for Marine Environmental Sciences, University of Bremen (MARUM)
2022
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Online Access: | https://epic.awi.de/id/eprint/57059/ https://doi.pangaea.de/10.1594/PANGAEA.948489 https://hdl.handle.net/10013/epic.c78f5752-a73d-4b47-85fd-c4bfa4c1f72e |
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ftawi:oai:epic.awi.de:57059 2024-09-15T18:07:03+00:00 Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) Rokitta, Sebastian D. Großmann, Christian H. Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva-Maria Rost, Bjoern 2022 https://epic.awi.de/id/eprint/57059/ https://doi.pangaea.de/10.1594/PANGAEA.948489 https://hdl.handle.net/10013/epic.c78f5752-a73d-4b47-85fd-c4bfa4c1f72e unknown Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI) Center for Marine Environmental Sciences, University of Bremen (MARUM) Rokitta, S. D. orcid:0000-0002-7540-9033 , Großmann, C. H. , Werner, E. , Moye, J. , Castellani, G. orcid:0000-0001-6151-015X , Nöthig, E. M. orcid:0000-0002-7527-7827 and Rost, B. orcid:0000-0001-5452-5505 (2022) Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) , Pangaea . hdl:10013/epic.c78f5752-a73d-4b47-85fd-c4bfa4c1f72e EPIC3Pangaea, Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI) Center for Marine Environmental Sciences, University of Bremen (MARUM) Article notRev 2022 ftawi 2024-06-24T04:30:12Z 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). 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 prominently under high temperature, underlining its role as a 'master variable'. pCO2 was the least effective driver, exerting mostly insignificant effects. The obtained data were used in a simplified ecosystem model to simulate P. pouchetii's bloom dynamics in the Fram Strait with increasing temperatures over the 21st century. Model results suggest that global warming will accelerate bloom dynamics, with earlier onsets of blooms and higher peak biomasses. Despite remaining uncertainties about the magnitude of these effects, data strongly suggest that increasing temperatures over the coming century will affect the phenology of Phaeocystis and other Arctic phytoplankton with likely important implications for higher trophic levels. Article in Journal/Newspaper Fram Strait Global warming Phytoplankton Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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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). 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 prominently under high temperature, underlining its role as a 'master variable'. pCO2 was the least effective driver, exerting mostly insignificant effects. The obtained data were used in a simplified ecosystem model to simulate P. pouchetii's bloom dynamics in the Fram Strait with increasing temperatures over the 21st century. Model results suggest that global warming will accelerate bloom dynamics, with earlier onsets of blooms and higher peak biomasses. Despite remaining uncertainties about the magnitude of these effects, data strongly suggest that increasing temperatures over the coming century will affect the phenology of Phaeocystis and other Arctic phytoplankton with likely important implications for higher trophic levels. |
format |
Article in Journal/Newspaper |
author |
Rokitta, Sebastian D. Großmann, Christian H. Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva-Maria Rost, Bjoern |
spellingShingle |
Rokitta, Sebastian D. Großmann, Christian H. Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva-Maria Rost, Bjoern Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) |
author_facet |
Rokitta, Sebastian D. Großmann, Christian H. Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva-Maria Rost, Bjoern |
author_sort |
Rokitta, Sebastian D. |
title |
Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) |
title_short |
Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) |
title_full |
Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) |
title_fullStr |
Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) |
title_full_unstemmed |
Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) |
title_sort |
phaeocystis pouchetii's responses to temperature (2 vs. 6 °c), light (55 vs. 160 µmol photons m-2 s-1) and pco2 (400 vs. 1000 µatm) |
publisher |
Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI) Center for Marine Environmental Sciences, University of Bremen (MARUM) |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/57059/ https://doi.pangaea.de/10.1594/PANGAEA.948489 https://hdl.handle.net/10013/epic.c78f5752-a73d-4b47-85fd-c4bfa4c1f72e |
genre |
Fram Strait Global warming Phytoplankton |
genre_facet |
Fram Strait Global warming Phytoplankton |
op_source |
EPIC3Pangaea, Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI) Center for Marine Environmental Sciences, University of Bremen (MARUM) |
op_relation |
Rokitta, S. D. orcid:0000-0002-7540-9033 , Großmann, C. H. , Werner, E. , Moye, J. , Castellani, G. orcid:0000-0001-6151-015X , Nöthig, E. M. orcid:0000-0002-7527-7827 and Rost, B. orcid:0000-0001-5452-5505 (2022) Phaeocystis pouchetii's responses to temperature (2 vs. 6 °C), light (55 vs. 160 µmol photons m-2 s-1) and pCO2 (400 vs. 1000 µatm) , Pangaea . hdl:10013/epic.c78f5752-a73d-4b47-85fd-c4bfa4c1f72e |
_version_ |
1810444434243846144 |