Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica
To better understand the impact of ocean acidification (OA) and changes in light availability on Southern Ocean phytoplankton physiology, we investigated the effects of pCO2 (380 and 800 µatm) in combination with low and high irradiance (20 or 50 and 200 µmol photons/m2/s) on growth, particulate org...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.874781 2024-09-15T17:45:40+00:00 Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica Trimborn, Scarlett Thoms, Silke Brenneis, Tina Heiden, Jasmin Beszteri, Sara Bischof, Kai 2017 text/tab-separated-values, 7396 data points https://doi.pangaea.de/10.1594/PANGAEA.874781 https://doi.org/10.1594/PANGAEA.874781 en eng PANGAEA Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Proye, Aurélien; Soetaert, Karline; Rae, James (2016): seacarb: seawater carbonate chemistry with R. R package version 3.1. https://cran.r-project.org/package=seacarb https://doi.pangaea.de/10.1594/PANGAEA.874781 https://doi.org/10.1594/PANGAEA.874781 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Trimborn, Scarlett; Thoms, Silke; Brenneis, Tina; Heiden, Jasmin; Beszteri, Sara; Bischof, Kai (2017): Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica. Physiologia Plantarum, https://doi.org/10.1111/ppl.12539 Alkalinity total standard deviation Antarctic Aragonite saturation state Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved organic particulate per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Chaetoceros debilis Chromista Electron transport rate Fragilariopsis kerguelensis Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Growth/Morphology Growth rate Haptophyta Irradiance Laboratory experiment Maximum photochemical quantum yield of photosystem II dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.87478110.1111/ppl.12539 2024-07-24T02:31:33Z To better understand the impact of ocean acidification (OA) and changes in light availability on Southern Ocean phytoplankton physiology, we investigated the effects of pCO2 (380 and 800 µatm) in combination with low and high irradiance (20 or 50 and 200 µmol photons/m2/s) on growth, particulate organic carbon (POC) fixation and photophysiology in the three ecologically relevant species Chaetoceros debilis, Fragilariopsis kerguelensis and Phaeocystis antarctica. Irrespective of the light scenario, neither growth nor POC per cell was stimulated by OA in any of the tested species and the two diatoms even displayed negative responses in growth (e.g. C. debilis) or POC content (e.g. F. kerguelensis) under OA in conjunction with high light. For both diatoms, also maximum quantum yields of PSII (Fv/Fm) were decreased under these conditions, indicating lowered photochemical efficiencies. To counteract the negative effects by OA and high light, the two diatoms showed diverging photoacclimation strategies. While cellular chlorophyll a and fucoxanthin contents were enhanced in C. debilis to potentially maximize light absorption, F. kerguelensis exhibited reduced chlorophyll a per cell, increased disconnection of antennae from photosystem II reaction centers and strongly lowered absolute electron transport rates (ETR). The decline in ETRs in F. kerguelensis might be explained in terms of different species-specific strategies for tuning the available flux of adenosine triphosphate and nicotinamide adenine dinucleotide phosphate. Overall, our results revealed that P. antarctica was more tolerant to OA and changes in irradiance than the two diatoms, which may have important implications for biogeochemical cycling. Dataset Antarc* Antarctic Antarctica Ocean acidification Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Alkalinity total standard deviation Antarctic Aragonite saturation state Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved organic particulate per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Chaetoceros debilis Chromista Electron transport rate Fragilariopsis kerguelensis Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Growth/Morphology Growth rate Haptophyta Irradiance Laboratory experiment Maximum photochemical quantum yield of photosystem II |
spellingShingle |
Alkalinity total standard deviation Antarctic Aragonite saturation state Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved organic particulate per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Chaetoceros debilis Chromista Electron transport rate Fragilariopsis kerguelensis Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Growth/Morphology Growth rate Haptophyta Irradiance Laboratory experiment Maximum photochemical quantum yield of photosystem II Trimborn, Scarlett Thoms, Silke Brenneis, Tina Heiden, Jasmin Beszteri, Sara Bischof, Kai Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica |
topic_facet |
Alkalinity total standard deviation Antarctic Aragonite saturation state Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved organic particulate per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Chaetoceros debilis Chromista Electron transport rate Fragilariopsis kerguelensis Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Growth/Morphology Growth rate Haptophyta Irradiance Laboratory experiment Maximum photochemical quantum yield of photosystem II |
description |
To better understand the impact of ocean acidification (OA) and changes in light availability on Southern Ocean phytoplankton physiology, we investigated the effects of pCO2 (380 and 800 µatm) in combination with low and high irradiance (20 or 50 and 200 µmol photons/m2/s) on growth, particulate organic carbon (POC) fixation and photophysiology in the three ecologically relevant species Chaetoceros debilis, Fragilariopsis kerguelensis and Phaeocystis antarctica. Irrespective of the light scenario, neither growth nor POC per cell was stimulated by OA in any of the tested species and the two diatoms even displayed negative responses in growth (e.g. C. debilis) or POC content (e.g. F. kerguelensis) under OA in conjunction with high light. For both diatoms, also maximum quantum yields of PSII (Fv/Fm) were decreased under these conditions, indicating lowered photochemical efficiencies. To counteract the negative effects by OA and high light, the two diatoms showed diverging photoacclimation strategies. While cellular chlorophyll a and fucoxanthin contents were enhanced in C. debilis to potentially maximize light absorption, F. kerguelensis exhibited reduced chlorophyll a per cell, increased disconnection of antennae from photosystem II reaction centers and strongly lowered absolute electron transport rates (ETR). The decline in ETRs in F. kerguelensis might be explained in terms of different species-specific strategies for tuning the available flux of adenosine triphosphate and nicotinamide adenine dinucleotide phosphate. Overall, our results revealed that P. antarctica was more tolerant to OA and changes in irradiance than the two diatoms, which may have important implications for biogeochemical cycling. |
format |
Dataset |
author |
Trimborn, Scarlett Thoms, Silke Brenneis, Tina Heiden, Jasmin Beszteri, Sara Bischof, Kai |
author_facet |
Trimborn, Scarlett Thoms, Silke Brenneis, Tina Heiden, Jasmin Beszteri, Sara Bischof, Kai |
author_sort |
Trimborn, Scarlett |
title |
Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica |
title_short |
Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica |
title_full |
Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica |
title_fullStr |
Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica |
title_full_unstemmed |
Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica |
title_sort |
two southern ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte phaeocystis antarctica |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.874781 https://doi.org/10.1594/PANGAEA.874781 |
genre |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
op_source |
Supplement to: Trimborn, Scarlett; Thoms, Silke; Brenneis, Tina; Heiden, Jasmin; Beszteri, Sara; Bischof, Kai (2017): Two Southern Ocean diatoms are more sensitive to ocean acidification and changes in irradiance than the prymnesiophyte Phaeocystis antarctica. Physiologia Plantarum, https://doi.org/10.1111/ppl.12539 |
op_relation |
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Proye, Aurélien; Soetaert, Karline; Rae, James (2016): seacarb: seawater carbonate chemistry with R. R package version 3.1. https://cran.r-project.org/package=seacarb https://doi.pangaea.de/10.1594/PANGAEA.874781 https://doi.org/10.1594/PANGAEA.874781 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.87478110.1111/ppl.12539 |
_version_ |
1810493568202047488 |