Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO 2
Abstract 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 μ mol photons m −2 s −1 ) and pCO 2 (400 vs. 1000 μ atm CO 2 , i.e., 40.5 vs. 101.3 Pa). Next to acclimation parameters (growth rates, p...
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Online Access: | http://dx.doi.org/10.1002/lno.12460 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12460 |
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crwiley:10.1002/lno.12460 2024-06-02T08:01:11+00:00 Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO 2 Rokitta, Sebastian D. Grossmann, Christian H. Werner, Elisa Moye, Jannika Castellani, Giulia Nöthig, Eva‐Maria Rost, Björn 2023 http://dx.doi.org/10.1002/lno.12460 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12460 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 68, issue 12, page 2789-2799 ISSN 0024-3590 1939-5590 journal-article 2023 crwiley https://doi.org/10.1002/lno.12460 2024-05-03T11:02:21Z Abstract 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 μ mol photons m −2 s −1 ) and pCO 2 (400 vs. 1000 μ atm CO 2 , 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”. pCO 2 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 21 st 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 Wiley Online Library Arctic Limnology and Oceanography 68 12 2789 2799 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract 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 μ mol photons m −2 s −1 ) and pCO 2 (400 vs. 1000 μ atm CO 2 , 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”. pCO 2 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 21 st 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 pCO 2 |
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 pCO 2 |
title_short |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO 2 |
title_full |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO 2 |
title_fullStr |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO 2 |
title_full_unstemmed |
Future warming stimulates growth and photosynthesis in an Arctic microalga more strongly than changes in light intensity or pCO 2 |
title_sort |
future warming stimulates growth and photosynthesis in an arctic microalga more strongly than changes in light intensity or pco 2 |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/lno.12460 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12460 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Fram Strait Global warming Phytoplankton |
genre_facet |
Arctic Fram Strait Global warming Phytoplankton |
op_source |
Limnology and Oceanography volume 68, issue 12, page 2789-2799 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
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 |
_version_ |
1800745502985158656 |