The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect
Interactions between phytoplankton and ultraviolet radiation (UVR: 280 – 400 nm) are undergoing changes dictated by variability in ocean temperature, the depth of mixed layers, nutrient availability, and the thickness of the ozone layer. There are a variety of mechanisms for phytoplankton to cope wi...
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Online Access: | https://doi.org/10.3389/fmars.2022.1022957 https://doaj.org/article/543b2f2154cd4bb89a216696a4b1dd7f |
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ftdoajarticles:oai:doaj.org/article:543b2f2154cd4bb89a216696a4b1dd7f 2023-05-15T13:50:21+02:00 The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect Elliot L. Weiss Mattias Rolf Cape B. Jack Pan Maria Vernet Chase C. James Tim J. Smyth Sun-Yong Ha José L. Iriarte B. Greg Mitchell 2022-10-01T00:00:00Z https://doi.org/10.3389/fmars.2022.1022957 https://doaj.org/article/543b2f2154cd4bb89a216696a4b1dd7f EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2022.1022957/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.1022957 https://doaj.org/article/543b2f2154cd4bb89a216696a4b1dd7f Frontiers in Marine Science, Vol 9 (2022) mycosporine-like amino acids ultraviolet radiation Southern Ocean phytoplankton diatoms UV-absorbing compounds Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2022 ftdoajarticles https://doi.org/10.3389/fmars.2022.1022957 2022-12-30T20:30:03Z Interactions between phytoplankton and ultraviolet radiation (UVR: 280 – 400 nm) are undergoing changes dictated by variability in ocean temperature, the depth of mixed layers, nutrient availability, and the thickness of the ozone layer. There are a variety of mechanisms for phytoplankton to cope with UVR stress, one of the most prevalent being the presence of mycosporine-like amino acids (MAAs). Despite the importance of these molecules to phytoplankton fitness under UVR stress, knowledge of the diversity and distribution of these molecules in the world’s oceans is relatively limited. Here, the composition and distribution of MAAs in phytoplankton were examined in a transect across the Southern Ocean, crossing multiple fronts, from eastern New Zealand to the West Antarctic Peninsula in March and April of 2018. The highest concentration of MAAs (> 0.2 μg/L) was found between 50 and 60°S, as well as along a longitudinal gradient between 137.47 and 144.78°W. A strong correlation was found between a model of the preceding month’s UVR dosage experienced in the mixed layer and the ratio of MAAs to chlorophyll-a across the transect, indicating a relationship between the integrated history of light exposure and phytoplankton physiology. Haptophytes accounted for the majority of biomass north of the polar front (PF) and were strongly correlated with a diversity of MAAs. South of the PF a transition to a community dominated by diatoms was observed, with community composition changes strongly correlated to porphyra-334 concentrations. The data presented here provide a baseline for MAA abundance and association with specific phytoplankton taxa across the Southern Ocean amid a changing climate. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean Antarctic Peninsula New Zealand Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
mycosporine-like amino acids ultraviolet radiation Southern Ocean phytoplankton diatoms UV-absorbing compounds Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
mycosporine-like amino acids ultraviolet radiation Southern Ocean phytoplankton diatoms UV-absorbing compounds Science Q General. Including nature conservation geographical distribution QH1-199.5 Elliot L. Weiss Mattias Rolf Cape B. Jack Pan Maria Vernet Chase C. James Tim J. Smyth Sun-Yong Ha José L. Iriarte B. Greg Mitchell The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect |
topic_facet |
mycosporine-like amino acids ultraviolet radiation Southern Ocean phytoplankton diatoms UV-absorbing compounds Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Interactions between phytoplankton and ultraviolet radiation (UVR: 280 – 400 nm) are undergoing changes dictated by variability in ocean temperature, the depth of mixed layers, nutrient availability, and the thickness of the ozone layer. There are a variety of mechanisms for phytoplankton to cope with UVR stress, one of the most prevalent being the presence of mycosporine-like amino acids (MAAs). Despite the importance of these molecules to phytoplankton fitness under UVR stress, knowledge of the diversity and distribution of these molecules in the world’s oceans is relatively limited. Here, the composition and distribution of MAAs in phytoplankton were examined in a transect across the Southern Ocean, crossing multiple fronts, from eastern New Zealand to the West Antarctic Peninsula in March and April of 2018. The highest concentration of MAAs (> 0.2 μg/L) was found between 50 and 60°S, as well as along a longitudinal gradient between 137.47 and 144.78°W. A strong correlation was found between a model of the preceding month’s UVR dosage experienced in the mixed layer and the ratio of MAAs to chlorophyll-a across the transect, indicating a relationship between the integrated history of light exposure and phytoplankton physiology. Haptophytes accounted for the majority of biomass north of the polar front (PF) and were strongly correlated with a diversity of MAAs. South of the PF a transition to a community dominated by diatoms was observed, with community composition changes strongly correlated to porphyra-334 concentrations. The data presented here provide a baseline for MAA abundance and association with specific phytoplankton taxa across the Southern Ocean amid a changing climate. |
format |
Article in Journal/Newspaper |
author |
Elliot L. Weiss Mattias Rolf Cape B. Jack Pan Maria Vernet Chase C. James Tim J. Smyth Sun-Yong Ha José L. Iriarte B. Greg Mitchell |
author_facet |
Elliot L. Weiss Mattias Rolf Cape B. Jack Pan Maria Vernet Chase C. James Tim J. Smyth Sun-Yong Ha José L. Iriarte B. Greg Mitchell |
author_sort |
Elliot L. Weiss |
title |
The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect |
title_short |
The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect |
title_full |
The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect |
title_fullStr |
The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect |
title_full_unstemmed |
The distribution of mycosporine-like amino acids in phytoplankton across a Southern Ocean transect |
title_sort |
distribution of mycosporine-like amino acids in phytoplankton across a southern ocean transect |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.1022957 https://doaj.org/article/543b2f2154cd4bb89a216696a4b1dd7f |
geographic |
Antarctic Southern Ocean Antarctic Peninsula New Zealand |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula New Zealand |
genre |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
op_source |
Frontiers in Marine Science, Vol 9 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2022.1022957/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.1022957 https://doaj.org/article/543b2f2154cd4bb89a216696a4b1dd7f |
op_doi |
https://doi.org/10.3389/fmars.2022.1022957 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1766253413737168896 |