Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i>
<p>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 t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-08-01
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| Series: | Biogeosciences |
| Online Access: | https://www.biogeosciences.net/16/2997/2019/bg-16-2997-2019.pdf |
| _version_ | 1818437274406223872 |
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| author | S. Trimborn S. Trimborn S. Thoms P. Karitter K. Bischof |
| author_facet | S. Trimborn S. Trimborn S. Thoms P. Karitter K. Bischof |
| author_sort | S. Trimborn |
| collection | DOAJ |
| description | <p>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 <span class="inline-formula"><i>p</i>CO<sub>2</sub></span> (400 and 1000 <span class="inline-formula">µ</span>atm) and
irradiance (20, 200 and 500 <span class="inline-formula">µ</span>mol photons m<span class="inline-formula"><sup>−2</sup></span> s<span class="inline-formula"><sup>−1</sup></span>) on growth,
elemental composition and photophysiology of the Antarctic cryptophyte
<i>Geminigera cryophila</i>. Under ambient <span class="inline-formula"><i>p</i>CO<sub>2</sub></span>, 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 <span class="inline-formula"><i>p</i>CO<sub>2</sub></span> 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 <i>G. cryophila</i> reveal beneficial
effects of ocean acidification in conjunction with enhanced irradiance on
growth and photosynthesis. Hence, cryptophytes such as <i>G. cryophila</i> 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.</p> |
| first_indexed | 2024-12-14T17:22:04Z |
| format | Article |
| id | doaj.art-5022c70f7de1417aa761d791a83a36d5 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-12-14T17:22:04Z |
| publishDate | 2019-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-5022c70f7de1417aa761d791a83a36d52022-12-21T22:53:19ZengCopernicus PublicationsBiogeosciences1726-41701726-41892019-08-01162997300810.5194/bg-16-2997-2019Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i>S. Trimborn0S. Trimborn1S. Thoms2P. Karitter3K. Bischof4EcoTrace, Biogeosciences section, Alfred Wegener Institute, 27568 Bremerhaven, GermanyMarine Botany, Department 2 Biology/Chemistry, University of Bremen, 28359 Bremen, GermanyEcoTrace, Biogeosciences section, Alfred Wegener Institute, 27568 Bremerhaven, GermanyEcoTrace, Biogeosciences section, Alfred Wegener Institute, 27568 Bremerhaven, GermanyMarine Botany, Department 2 Biology/Chemistry, University of Bremen, 28359 Bremen, Germany<p>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 <span class="inline-formula"><i>p</i>CO<sub>2</sub></span> (400 and 1000 <span class="inline-formula">µ</span>atm) and irradiance (20, 200 and 500 <span class="inline-formula">µ</span>mol photons m<span class="inline-formula"><sup>−2</sup></span> s<span class="inline-formula"><sup>−1</sup></span>) on growth, elemental composition and photophysiology of the Antarctic cryptophyte <i>Geminigera cryophila</i>. Under ambient <span class="inline-formula"><i>p</i>CO<sub>2</sub></span>, 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 <span class="inline-formula"><i>p</i>CO<sub>2</sub></span> 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 <i>G. cryophila</i> reveal beneficial effects of ocean acidification in conjunction with enhanced irradiance on growth and photosynthesis. Hence, cryptophytes such as <i>G. cryophila</i> 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.</p>https://www.biogeosciences.net/16/2997/2019/bg-16-2997-2019.pdf |
| spellingShingle | S. Trimborn S. Trimborn S. Thoms P. Karitter K. Bischof Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i> Biogeosciences |
| title | Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i> |
| title_full | Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i> |
| title_fullStr | Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i> |
| title_full_unstemmed | Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i> |
| title_short | Ocean acidification and high irradiance stimulate the photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte <i>Geminigera cryophila</i> |
| title_sort | ocean acidification and high irradiance stimulate the photo physiological fitness growth and carbon production of the antarctic cryptophyte i geminigera cryophila i |
| url | https://www.biogeosciences.net/16/2997/2019/bg-16-2997-2019.pdf |
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