Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica
Sea ice retreat, changing stratification, and ocean acidification are fundamentally changing the light availability and physico-chemical conditions for primary producers in the Arctic Ocean. However, detailed studies on ecophysiological strategies and performance of key species in the pelagic and ic...
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Language: | English |
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PANGAEA
2022
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.951402 https://doi.org/10.1594/PANGAEA.951402 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.951402 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Alkalinity total standard deviation Antenna size Aragonite saturation state Arctic Bicarbonate ion Biogenic silica per cell Biogenic silica/Carbon organic particulate Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved production per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Central_Arctic_ocean Chlorophyll a/particulate organic carbon ratio Chlorophyll a per cell Chromista Connectivity between photosystem II Electron transport rate relative maximum velocity Event label EXP Experiment |
spellingShingle |
Alkalinity total standard deviation Antenna size Aragonite saturation state Arctic Bicarbonate ion Biogenic silica per cell Biogenic silica/Carbon organic particulate Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved production per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Central_Arctic_ocean Chlorophyll a/particulate organic carbon ratio Chlorophyll a per cell Chromista Connectivity between photosystem II Electron transport rate relative maximum velocity Event label EXP Experiment Wolf, Klara K E Rokitta, Sebastian D Hoppe, Clara Jule Marie Rost, Björn Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica |
topic_facet |
Alkalinity total standard deviation Antenna size Aragonite saturation state Arctic Bicarbonate ion Biogenic silica per cell Biogenic silica/Carbon organic particulate Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved production per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Central_Arctic_ocean Chlorophyll a/particulate organic carbon ratio Chlorophyll a per cell Chromista Connectivity between photosystem II Electron transport rate relative maximum velocity Event label EXP Experiment |
description |
Sea ice retreat, changing stratification, and ocean acidification are fundamentally changing the light availability and physico-chemical conditions for primary producers in the Arctic Ocean. However, detailed studies on ecophysiological strategies and performance of key species in the pelagic and ice-associated habitat remain scarce. Therefore, we investigated the acclimated responses of the diatoms Thalassiosira hyalina and Melosira arctica toward elevated irradiance and CO2 partial pressures (pCO2). Next to growth, elemental composition, and biomass production, we assessed detailed photophysiological responses through fluorometry and gas-flux measurements, including respiration and carbon acquisition. In the pelagic T. hyalina, growth rates remained high in all treatments and biomass production increased strongly with light. Even under low irradiances cells maintained a high-light acclimated state, allowing them to opportunistically utilize high irradiances by means of a highly plastic photosynthetic machinery and carbon uptake. The ice-associated M. arctica proved to be less plastic and more specialized on low-light. Its acclimation to high irradiances was characterized by minimizing photon harvest and photosynthetic efficiency, which led to lowered growth. Comparably low growth rates and strong silification advocate a strategy of persistence rather than of fast proliferation, which is also in line with the observed formation of resting stages under low-light conditions. In both species, responses to elevated pCO2 were comparably minor. Although both diatom species persisted under the applied conditions, their competitive abilities and strategies differ strongly. With the anticipated extension of Arctic pelagic habitats, flexible high-light specialists like T. hyalina seem to face a brighter future. |
format |
Dataset |
author |
Wolf, Klara K E Rokitta, Sebastian D Hoppe, Clara Jule Marie Rost, Björn |
author_facet |
Wolf, Klara K E Rokitta, Sebastian D Hoppe, Clara Jule Marie Rost, Björn |
author_sort |
Wolf, Klara K E |
title |
Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica |
title_short |
Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica |
title_full |
Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica |
title_fullStr |
Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica |
title_full_unstemmed |
Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica |
title_sort |
seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms thalassiosira hyalina and melosira arctica |
publisher |
PANGAEA |
publishDate |
2022 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.951402 https://doi.org/10.1594/PANGAEA.951402 |
op_coverage |
MEDIAN LATITUDE: 79.235235 * MEDIAN LONGITUDE: 3.547565 * SOUTH-BOUND LATITUDE: 78.916670 * WEST-BOUND LONGITUDE: -4.838200 * NORTH-BOUND LATITUDE: 79.553800 * EAST-BOUND LONGITUDE: 11.933330 |
long_lat |
ENVELOPE(-4.838200,11.933330,79.553800,78.916670) |
genre |
Arctic Arctic Ocean Ocean acidification Sea ice |
genre_facet |
Arctic Arctic Ocean Ocean acidification Sea ice |
op_relation |
Wolf, Klara K E; Rokitta, Sebastian D; Hoppe, Clara Jule Marie; Rost, Björn (2022): Pelagic and ice‐associated microalgae under elevated light and pCO 2 : Contrasting physiological strategies in two Arctic diatoms. Limnology and Oceanography, lno.12174, https://doi.org/10.1002/lno.12174 Wolf, Klara K E; Rokitta, Sebastian D; Hoppe, Clara Jule Marie; Rost, Björn (2022): Pelagic and ice-associated microalgae under elevated light and pCO2: Contrasting physiological strategies in two Arctic diatoms [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.947543 Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James (2021): seacarb: seawater carbonate chemistry with R. R package version 3.2.16. https://cran.r-project.org/web/packages/seacarb/index.html https://doi.pangaea.de/10.1594/PANGAEA.951402 https://doi.org/10.1594/PANGAEA.951402 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.95140210.1002/lno.1217410.1594/PANGAEA.947543 |
_version_ |
1810292697419743232 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.951402 2024-09-15T17:50:53+00:00 Seawater carbonate chemistry and growth, elemental composition,biomass production, respiration and carbon acquisition of diatoms Thalassiosira hyalina and Melosira arctica Wolf, Klara K E Rokitta, Sebastian D Hoppe, Clara Jule Marie Rost, Björn MEDIAN LATITUDE: 79.235235 * MEDIAN LONGITUDE: 3.547565 * SOUTH-BOUND LATITUDE: 78.916670 * WEST-BOUND LONGITUDE: -4.838200 * NORTH-BOUND LATITUDE: 79.553800 * EAST-BOUND LONGITUDE: 11.933330 2022 text/tab-separated-values, 4737 data points https://doi.pangaea.de/10.1594/PANGAEA.951402 https://doi.org/10.1594/PANGAEA.951402 en eng PANGAEA Wolf, Klara K E; Rokitta, Sebastian D; Hoppe, Clara Jule Marie; Rost, Björn (2022): Pelagic and ice‐associated microalgae under elevated light and pCO 2 : Contrasting physiological strategies in two Arctic diatoms. Limnology and Oceanography, lno.12174, https://doi.org/10.1002/lno.12174 Wolf, Klara K E; Rokitta, Sebastian D; Hoppe, Clara Jule Marie; Rost, Björn (2022): Pelagic and ice-associated microalgae under elevated light and pCO2: Contrasting physiological strategies in two Arctic diatoms [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.947543 Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James (2021): seacarb: seawater carbonate chemistry with R. R package version 3.2.16. https://cran.r-project.org/web/packages/seacarb/index.html https://doi.pangaea.de/10.1594/PANGAEA.951402 https://doi.org/10.1594/PANGAEA.951402 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Alkalinity total standard deviation Antenna size Aragonite saturation state Arctic Bicarbonate ion Biogenic silica per cell Biogenic silica/Carbon organic particulate Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved production per cell Carbon/Nitrogen ratio Carbonate ion Carbonate system computation flag Carbon dioxide Central_Arctic_ocean Chlorophyll a/particulate organic carbon ratio Chlorophyll a per cell Chromista Connectivity between photosystem II Electron transport rate relative maximum velocity Event label EXP Experiment dataset 2022 ftpangaea https://doi.org/10.1594/PANGAEA.95140210.1002/lno.1217410.1594/PANGAEA.947543 2024-07-24T02:31:35Z Sea ice retreat, changing stratification, and ocean acidification are fundamentally changing the light availability and physico-chemical conditions for primary producers in the Arctic Ocean. However, detailed studies on ecophysiological strategies and performance of key species in the pelagic and ice-associated habitat remain scarce. Therefore, we investigated the acclimated responses of the diatoms Thalassiosira hyalina and Melosira arctica toward elevated irradiance and CO2 partial pressures (pCO2). Next to growth, elemental composition, and biomass production, we assessed detailed photophysiological responses through fluorometry and gas-flux measurements, including respiration and carbon acquisition. In the pelagic T. hyalina, growth rates remained high in all treatments and biomass production increased strongly with light. Even under low irradiances cells maintained a high-light acclimated state, allowing them to opportunistically utilize high irradiances by means of a highly plastic photosynthetic machinery and carbon uptake. The ice-associated M. arctica proved to be less plastic and more specialized on low-light. Its acclimation to high irradiances was characterized by minimizing photon harvest and photosynthetic efficiency, which led to lowered growth. Comparably low growth rates and strong silification advocate a strategy of persistence rather than of fast proliferation, which is also in line with the observed formation of resting stages under low-light conditions. In both species, responses to elevated pCO2 were comparably minor. Although both diatom species persisted under the applied conditions, their competitive abilities and strategies differ strongly. With the anticipated extension of Arctic pelagic habitats, flexible high-light specialists like T. hyalina seem to face a brighter future. Dataset Arctic Arctic Ocean Ocean acidification Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-4.838200,11.933330,79.553800,78.916670) |