Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila
Ecophysiological studies on Antarctic cryptophytes to assess whether climatic changes such as ocean acidification and enhanced stratification affect their growth in Antarctic coastal waters in the future are lacking so far. This is the first study that investigates the combined effects of the increa...
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ftawi:oai:epic.awi.de:49877 2024-09-15T17:47:09+00:00 Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila Trimborn, Scarlett Thoms, Silke Karitter, Pascal Bischof, Kai 2019-07-12 https://epic.awi.de/id/eprint/49877/ https://hdl.handle.net/10013/epic.3d0b7948-9677-45b0-9bb3-839ddae159ce unknown COPERNICUS GESELLSCHAFT MBH Trimborn, S. orcid:0000-0003-1434-9927 , Thoms, S. , Karitter, P. and Bischof, K. (2019) Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila , Biogeosciences . doi:10.5194/bg-2019-97 <https://doi.org/10.5194/bg-2019-97> , hdl:10013/epic.3d0b7948-9677-45b0-9bb3-839ddae159ce EPIC3Biogeosciences, COPERNICUS GESELLSCHAFT MBH, ISSN: 1726-4170 Article isiRev 2019 ftawi https://doi.org/10.5194/bg-2019-97 2024-06-24T04:22:11Z Ecophysiological studies on Antarctic cryptophytes to assess whether climatic changes such as ocean acidification and enhanced stratification affect their growth in Antarctic coastal waters in the future are lacking so far. This is the first study that investigates the combined effects of the increasing availability of pCO2 (400 and 1000 μatm) and irradiance (20, 200 and 500 μmol photons m-2 s-1) on growth, elemental composition and photophysiology of the Antarctic cryptophyte Geminigera cryophila. Under ambient pCO2, this species was characterized by a pronounced sensitivity to increasing irradiance with complete growth inhibition at the highest light intensity. Interestingly, when grown under high pCO2 this negative light effect vanished, and it reached the highest rates of growth and particulate organic carbon production at the highest irradiance compared to the other tested experimental conditions. Our results for G. cryophila reveal beneficial effects of ocean acidification in conjunction with enhanced irradiance on growth and photosynthesis. Hence, cryptophytes such as G. cryophila may be potential winners of climate change, potentially thriving better in more stratified and acidic coastal waters and contributing in higher abundance to future phytoplankton assemblages of coastal Antarctic waters. Article in Journal/Newspaper Antarc* Antarctic Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Ecophysiological studies on Antarctic cryptophytes to assess whether climatic changes such as ocean acidification and enhanced stratification affect their growth in Antarctic coastal waters in the future are lacking so far. This is the first study that investigates the combined effects of the increasing availability of pCO2 (400 and 1000 μatm) and irradiance (20, 200 and 500 μmol photons m-2 s-1) on growth, elemental composition and photophysiology of the Antarctic cryptophyte Geminigera cryophila. Under ambient pCO2, this species was characterized by a pronounced sensitivity to increasing irradiance with complete growth inhibition at the highest light intensity. Interestingly, when grown under high pCO2 this negative light effect vanished, and it reached the highest rates of growth and particulate organic carbon production at the highest irradiance compared to the other tested experimental conditions. Our results for G. cryophila reveal beneficial effects of ocean acidification in conjunction with enhanced irradiance on growth and photosynthesis. Hence, cryptophytes such as G. cryophila may be potential winners of climate change, potentially thriving better in more stratified and acidic coastal waters and contributing in higher abundance to future phytoplankton assemblages of coastal Antarctic waters. |
format |
Article in Journal/Newspaper |
author |
Trimborn, Scarlett Thoms, Silke Karitter, Pascal Bischof, Kai |
spellingShingle |
Trimborn, Scarlett Thoms, Silke Karitter, Pascal Bischof, Kai Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila |
author_facet |
Trimborn, Scarlett Thoms, Silke Karitter, Pascal Bischof, Kai |
author_sort |
Trimborn, Scarlett |
title |
Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila |
title_short |
Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila |
title_full |
Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila |
title_fullStr |
Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila |
title_full_unstemmed |
Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila |
title_sort |
ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the antarctic cryptophyte geminigera cryophila |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49877/ https://hdl.handle.net/10013/epic.3d0b7948-9677-45b0-9bb3-839ddae159ce |
genre |
Antarc* Antarctic Ocean acidification |
genre_facet |
Antarc* Antarctic Ocean acidification |
op_source |
EPIC3Biogeosciences, COPERNICUS GESELLSCHAFT MBH, ISSN: 1726-4170 |
op_relation |
Trimborn, S. orcid:0000-0003-1434-9927 , Thoms, S. , Karitter, P. and Bischof, K. (2019) Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila , Biogeosciences . doi:10.5194/bg-2019-97 <https://doi.org/10.5194/bg-2019-97> , hdl:10013/epic.3d0b7948-9677-45b0-9bb3-839ddae159ce |
op_doi |
https://doi.org/10.5194/bg-2019-97 |
_version_ |
1810495860978483200 |