Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean
Abstract Fluorescence quantum yield is a powerful tool for assessing phytoplankton photophysiology and photosynthetic efficiency, but there is a paucity of in situ studies. Here we present the first wavelength‐specific fluorescence quantum yield data from high spatial and temporal resolution real‐ti...
Published in: | Limnology and Oceanography |
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crwiley:10.1002/lno.12295 2024-06-02T08:14:46+00:00 Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean Ryan‐Keogh, Thomas James Bone, Emma Lewis Thomalla, Sandy J. Lain, Lisl Smith, Marie E. Bernard, Stewart Vichi, Marcello Department of Science and Innovation, South Africa National Research Foundation 2023 http://dx.doi.org/10.1002/lno.12295 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12295 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12295 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12295 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Limnology and Oceanography volume 68, issue 3, page 569-582 ISSN 0024-3590 1939-5590 journal-article 2023 crwiley https://doi.org/10.1002/lno.12295 2024-05-03T11:17:35Z Abstract Fluorescence quantum yield is a powerful tool for assessing phytoplankton photophysiology and photosynthetic efficiency, but there is a paucity of in situ studies. Here we present the first wavelength‐specific fluorescence quantum yield data from high spatial and temporal resolution real‐time measurements made in the Southern Ocean. This dataset represents both winter and summer conditions across a broad latitudinal range of the Atlantic and Indian South Ocean and the presented analysis assesses the potential influence of a range of physical, chemical, and biological drivers of variability. The results indicate that both light history and potential iron limitation play significant roles in constraining the magnitude of fluorescence quantum yield on a seasonal basis, with links to specific pigment composition of carotenoids involved in fluorescence quenching. Whereas community structure and associated pigment content play a strong role in dictating the spectral shape of fluorescence quantum yield both seasonally and spatially, with larger diatom‐dominated communities fluorescing more in the blue region of the spectrum and smaller phycoerythrin‐containing phytoplankton fluorescing more in the green‐orange region of the spectrum. This study provides a better understanding of the drivers of variability of in situ fluorescence quantum yield, which is useful for informing interpretations of studies based on remotely sensed signals, which are essential for investigating spatial and temporal variability in photophysiological characteristics on longer time scales. Article in Journal/Newspaper Southern Ocean Wiley Online Library Indian Southern Ocean Limnology and Oceanography 68 3 569 582 |
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English |
description |
Abstract Fluorescence quantum yield is a powerful tool for assessing phytoplankton photophysiology and photosynthetic efficiency, but there is a paucity of in situ studies. Here we present the first wavelength‐specific fluorescence quantum yield data from high spatial and temporal resolution real‐time measurements made in the Southern Ocean. This dataset represents both winter and summer conditions across a broad latitudinal range of the Atlantic and Indian South Ocean and the presented analysis assesses the potential influence of a range of physical, chemical, and biological drivers of variability. The results indicate that both light history and potential iron limitation play significant roles in constraining the magnitude of fluorescence quantum yield on a seasonal basis, with links to specific pigment composition of carotenoids involved in fluorescence quenching. Whereas community structure and associated pigment content play a strong role in dictating the spectral shape of fluorescence quantum yield both seasonally and spatially, with larger diatom‐dominated communities fluorescing more in the blue region of the spectrum and smaller phycoerythrin‐containing phytoplankton fluorescing more in the green‐orange region of the spectrum. This study provides a better understanding of the drivers of variability of in situ fluorescence quantum yield, which is useful for informing interpretations of studies based on remotely sensed signals, which are essential for investigating spatial and temporal variability in photophysiological characteristics on longer time scales. |
author2 |
Department of Science and Innovation, South Africa National Research Foundation |
format |
Article in Journal/Newspaper |
author |
Ryan‐Keogh, Thomas James Bone, Emma Lewis Thomalla, Sandy J. Lain, Lisl Smith, Marie E. Bernard, Stewart Vichi, Marcello |
spellingShingle |
Ryan‐Keogh, Thomas James Bone, Emma Lewis Thomalla, Sandy J. Lain, Lisl Smith, Marie E. Bernard, Stewart Vichi, Marcello Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean |
author_facet |
Ryan‐Keogh, Thomas James Bone, Emma Lewis Thomalla, Sandy J. Lain, Lisl Smith, Marie E. Bernard, Stewart Vichi, Marcello |
author_sort |
Ryan‐Keogh, Thomas James |
title |
Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean |
title_short |
Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean |
title_full |
Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean |
title_fullStr |
Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean |
title_full_unstemmed |
Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean |
title_sort |
spatial and temporal drivers of fluorescence quantum yield variability in the southern ocean |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/lno.12295 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12295 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12295 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12295 |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology and Oceanography volume 68, issue 3, page 569-582 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1002/lno.12295 |
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Limnology and Oceanography |
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68 |
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3 |
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569 |
op_container_end_page |
582 |
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1800738736089071616 |