Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF
Although iron (Fe) availability primarily sets the rate of phytoplankton growth and primary and export production in the Southern Ocean, other environmental factors, most significantly light, also affect productivity. As light availability strongly influences phytoplankton species distribution in lo...
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ftfrontimediafig:oai:figshare.com:article/8002934 2023-05-15T13:38:04+02:00 Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF Scarlett Trimborn Silke Thoms Kai Bischof Sara Beszteri 2019-04-17T04:05:41Z https://doi.org/10.3389/fmars.2019.00167.s001 https://figshare.com/articles/Data_Sheet_1_Susceptibility_of_Two_Southern_Ocean_Phytoplankton_Key_Species_to_Iron_Limitation_and_High_Light_PDF/8002934 unknown doi:10.3389/fmars.2019.00167.s001 https://figshare.com/articles/Data_Sheet_1_Susceptibility_of_Two_Southern_Ocean_Phytoplankton_Key_Species_to_Iron_Limitation_and_High_Light_PDF/8002934 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering climate change growth multiple stressors photophysiology photosynthesis trace metals Chaetoceros Phaeocystis Dataset 2019 ftfrontimediafig https://doi.org/10.3389/fmars.2019.00167.s001 2019-04-17T22:58:33Z Although iron (Fe) availability primarily sets the rate of phytoplankton growth and primary and export production in the Southern Ocean, other environmental factors, most significantly light, also affect productivity. As light availability strongly influences phytoplankton species distribution in low Fe-waters, we investigated the combined effects of increasing light (20, 200, and 500 μmol photons m -2 s -1 ) in conjunction with different Fe (0.4 and 2 nM) availability on the physiology of two ecologically relevant phytoplankton species in the Southern Ocean, Chaetoceros debilis (Bacillariophyceae) and Phaeocystis antarctica (Haptophyceae). Fe-deficient cells of P. antarctica displayed similar high growth rates at all irradiances. In comparison, Fe-deplete C. debilis cells grew much slower under low and medium irradiance and were unable to grow at the highest irradiance. Interestingly, Fe-deficient C. debilis cells were better protected against short-term excessive irradiances than P. antarctica. This tolerance was apparently counteracted by strongly lowered growth and particulate organic carbon production rates of the diatom relative to the prymnesiophyte. Overall, our results show that P. antarctica was the more tolerant species to changes in the availability of Fe and light, providing it a competitive advantage under a high light regime in Fe-deficient waters as projected for the future. Dataset Antarc* Antarctica Southern Ocean Frontiers: Figshare Southern Ocean |
institution |
Open Polar |
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Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering climate change growth multiple stressors photophysiology photosynthesis trace metals Chaetoceros Phaeocystis |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering climate change growth multiple stressors photophysiology photosynthesis trace metals Chaetoceros Phaeocystis Scarlett Trimborn Silke Thoms Kai Bischof Sara Beszteri Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering climate change growth multiple stressors photophysiology photosynthesis trace metals Chaetoceros Phaeocystis |
description |
Although iron (Fe) availability primarily sets the rate of phytoplankton growth and primary and export production in the Southern Ocean, other environmental factors, most significantly light, also affect productivity. As light availability strongly influences phytoplankton species distribution in low Fe-waters, we investigated the combined effects of increasing light (20, 200, and 500 μmol photons m -2 s -1 ) in conjunction with different Fe (0.4 and 2 nM) availability on the physiology of two ecologically relevant phytoplankton species in the Southern Ocean, Chaetoceros debilis (Bacillariophyceae) and Phaeocystis antarctica (Haptophyceae). Fe-deficient cells of P. antarctica displayed similar high growth rates at all irradiances. In comparison, Fe-deplete C. debilis cells grew much slower under low and medium irradiance and were unable to grow at the highest irradiance. Interestingly, Fe-deficient C. debilis cells were better protected against short-term excessive irradiances than P. antarctica. This tolerance was apparently counteracted by strongly lowered growth and particulate organic carbon production rates of the diatom relative to the prymnesiophyte. Overall, our results show that P. antarctica was the more tolerant species to changes in the availability of Fe and light, providing it a competitive advantage under a high light regime in Fe-deficient waters as projected for the future. |
format |
Dataset |
author |
Scarlett Trimborn Silke Thoms Kai Bischof Sara Beszteri |
author_facet |
Scarlett Trimborn Silke Thoms Kai Bischof Sara Beszteri |
author_sort |
Scarlett Trimborn |
title |
Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF |
title_short |
Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF |
title_full |
Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF |
title_fullStr |
Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF |
title_full_unstemmed |
Data_Sheet_1_Susceptibility of Two Southern Ocean Phytoplankton Key Species to Iron Limitation and High Light.PDF |
title_sort |
data_sheet_1_susceptibility of two southern ocean phytoplankton key species to iron limitation and high light.pdf |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmars.2019.00167.s001 https://figshare.com/articles/Data_Sheet_1_Susceptibility_of_Two_Southern_Ocean_Phytoplankton_Key_Species_to_Iron_Limitation_and_High_Light_PDF/8002934 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_relation |
doi:10.3389/fmars.2019.00167.s001 https://figshare.com/articles/Data_Sheet_1_Susceptibility_of_Two_Southern_Ocean_Phytoplankton_Key_Species_to_Iron_Limitation_and_High_Light_PDF/8002934 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2019.00167.s001 |
_version_ |
1766101239005708288 |