Ocean acidification reduces the growth of two Southern Ocean phytoplankton
Model projections for the Southern Ocean indicate that light, iron (Fe) availability, temperature and carbon dioxide (CO 2 ) will change concurrently in the future. We investigated the physiological responses of Southern Ocean phytoplankton to multiple variables by culturing the haptophyte Phaeocyst...
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Online Access: | https://doi.org/10.3354/meps13923 http://ecite.utas.edu.au/150898 |
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ftunivtasecite:oai:ecite.utas.edu.au:150898 2023-05-15T13:42:40+02:00 Ocean acidification reduces the growth of two Southern Ocean phytoplankton Andrew, SM Strzepek, RF Branson, O Ellwood, MJ 2022 application/pdf https://doi.org/10.3354/meps13923 http://ecite.utas.edu.au/150898 en eng Inter-Research http://ecite.utas.edu.au/150898/1/150898 - Ocean acidification reduces the growth of two Southern Ocean phytoplankton.pdf http://dx.doi.org/10.3354/meps13923 Andrew, SM and Strzepek, RF and Branson, O and Ellwood, MJ, Ocean acidification reduces the growth of two Southern Ocean phytoplankton, Marine Ecology Progress Series, 682 pp. 51-64. ISSN 0171-8630 (2022) [Refereed Article] http://ecite.utas.edu.au/150898 Earth Sciences Oceanography Biological oceanography Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.3354/meps13923 2022-11-14T23:17:15Z Model projections for the Southern Ocean indicate that light, iron (Fe) availability, temperature and carbon dioxide (CO 2 ) will change concurrently in the future. We investigated the physiological responses of Southern Ocean phytoplankton to multiple variables by culturing the haptophyte Phaeocystis antarctica and the diatom Chaetoceros flexuosus under various combinations of light, Fe, temperature and CO 2 . Using statistical models, the influence of each environmental variable was analysed for each physiological response, ultimately predicting how future conditions (high temperature and high CO 2 ) would influence the 2 phytoplankton species. Under future conditions, cellular chlorophyll a and carbon to nitrogen molar ratios were modelled to increase for both species in all light and Fe treatments, but at times were inconsistent with measured values. Measured and modelled values of the photochemical efficiency of photosystem II ( F v / F m ) declined in cultures of P. antarctica due to concurrent increases in temperature and CO 2 , under all light and Fe treatments. The trends in F v / F m for C. flexuosus were less clear. Our model and observations suggest that when temperature and CO 2 are concurrently increased, the growth of both species remains largely unchanged. This modelling analysis reveals that high CO 2 exerts a strong negative influence on the growth of both phytoplankton, and any future increase in growth can be attributed to the positive effect of warming rather than a CO 2 fertilisation effect. Article in Journal/Newspaper Antarc* Antarctica Ocean acidification Southern Ocean eCite UTAS (University of Tasmania) Southern Ocean Marine Ecology Progress Series 682 51 64 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Biological oceanography |
spellingShingle |
Earth Sciences Oceanography Biological oceanography Andrew, SM Strzepek, RF Branson, O Ellwood, MJ Ocean acidification reduces the growth of two Southern Ocean phytoplankton |
topic_facet |
Earth Sciences Oceanography Biological oceanography |
description |
Model projections for the Southern Ocean indicate that light, iron (Fe) availability, temperature and carbon dioxide (CO 2 ) will change concurrently in the future. We investigated the physiological responses of Southern Ocean phytoplankton to multiple variables by culturing the haptophyte Phaeocystis antarctica and the diatom Chaetoceros flexuosus under various combinations of light, Fe, temperature and CO 2 . Using statistical models, the influence of each environmental variable was analysed for each physiological response, ultimately predicting how future conditions (high temperature and high CO 2 ) would influence the 2 phytoplankton species. Under future conditions, cellular chlorophyll a and carbon to nitrogen molar ratios were modelled to increase for both species in all light and Fe treatments, but at times were inconsistent with measured values. Measured and modelled values of the photochemical efficiency of photosystem II ( F v / F m ) declined in cultures of P. antarctica due to concurrent increases in temperature and CO 2 , under all light and Fe treatments. The trends in F v / F m for C. flexuosus were less clear. Our model and observations suggest that when temperature and CO 2 are concurrently increased, the growth of both species remains largely unchanged. This modelling analysis reveals that high CO 2 exerts a strong negative influence on the growth of both phytoplankton, and any future increase in growth can be attributed to the positive effect of warming rather than a CO 2 fertilisation effect. |
format |
Article in Journal/Newspaper |
author |
Andrew, SM Strzepek, RF Branson, O Ellwood, MJ |
author_facet |
Andrew, SM Strzepek, RF Branson, O Ellwood, MJ |
author_sort |
Andrew, SM |
title |
Ocean acidification reduces the growth of two Southern Ocean phytoplankton |
title_short |
Ocean acidification reduces the growth of two Southern Ocean phytoplankton |
title_full |
Ocean acidification reduces the growth of two Southern Ocean phytoplankton |
title_fullStr |
Ocean acidification reduces the growth of two Southern Ocean phytoplankton |
title_full_unstemmed |
Ocean acidification reduces the growth of two Southern Ocean phytoplankton |
title_sort |
ocean acidification reduces the growth of two southern ocean phytoplankton |
publisher |
Inter-Research |
publishDate |
2022 |
url |
https://doi.org/10.3354/meps13923 http://ecite.utas.edu.au/150898 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctica Ocean acidification Southern Ocean |
op_relation |
http://ecite.utas.edu.au/150898/1/150898 - Ocean acidification reduces the growth of two Southern Ocean phytoplankton.pdf http://dx.doi.org/10.3354/meps13923 Andrew, SM and Strzepek, RF and Branson, O and Ellwood, MJ, Ocean acidification reduces the growth of two Southern Ocean phytoplankton, Marine Ecology Progress Series, 682 pp. 51-64. ISSN 0171-8630 (2022) [Refereed Article] http://ecite.utas.edu.au/150898 |
op_doi |
https://doi.org/10.3354/meps13923 |
container_title |
Marine Ecology Progress Series |
container_volume |
682 |
container_start_page |
51 |
op_container_end_page |
64 |
_version_ |
1766171538964348928 |