Combined effects of light, CO2 and iron on Antarctic phytoplankton
The Southern Ocean (SO) is an important sink for anthropogenic carbon dioxide (CO2). Climate change will cause changes in various environmental parameters, which in turn can affect growth and productivity of SO phytoplankton. Due to global warming, sea surface temperatures will increase and lead to...
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ftawi:oai:epic.awi.de:47447 2023-05-15T13:45:21+02:00 Combined effects of light, CO2 and iron on Antarctic phytoplankton Pausch, Franziska Heiden, Jasmin P. Koch, Florian Hassler, Christel S. Trimborn, Scarlett 2018-06-20 https://epic.awi.de/id/eprint/47447/ https://hdl.handle.net/10013/epic.76b5cd24-56a5-4f65-a3e9-14b25918014c unknown Pausch, F. orcid:0000-0002-4207-1304 , Heiden, J. P. , Koch, F. , Hassler, C. S. and Trimborn, S. orcid:0000-0003-1434-9927 (2018) Combined effects of light, CO2 and iron on Antarctic phytoplankton , POLAR2018, Davos, Switzerland, 19 June 2018 - 23 June 2018 . hdl:10013/epic.76b5cd24-56a5-4f65-a3e9-14b25918014c EPIC3POLAR2018, Davos, Switzerland, 2018-06-19-2018-06-23 Conference notRev 2018 ftawi 2021-12-24T15:43:57Z The Southern Ocean (SO) is an important sink for anthropogenic carbon dioxide (CO2). Climate change will cause changes in various environmental parameters, which in turn can affect growth and productivity of SO phytoplankton. Due to global warming, sea surface temperatures will increase and lead to a more stratified and shallower mixed layer resulting potentially in higher light availability and enhanced primary production of iron-limited phytoplankton. On the other hand, ocean acidification may reduce the bioavailability of iron to phytoplankton. To examine the influence of iron availability in combination with current and future higher CO2 concentrations under low and high irradiance on SO phytoplankton physiology, bottle manipulation experiments with a natural phytoplankton assemblage from the Drake Passage were conducted. Ocean acidification led to lowered abundances of Pseudo-nitzschia species at both irradiances. While higher irradiance stimulated daily particulate organic carbon production, this stimulating effect, however, was reduced under high pCO2, but only under iron-limitation. Moreover, the ratio of biogenic silicate to particulate organic carbon remained unchanged by high pCO2 for both iron treatments under high light, but declined under low light. Gaining more insight on the complex interplay of multiple environmental factors is valuable to predict future responses of SO phytoplankton to climate change. Conference Object Antarc* Antarctic Drake Passage Ocean acidification Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean Drake Passage |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The Southern Ocean (SO) is an important sink for anthropogenic carbon dioxide (CO2). Climate change will cause changes in various environmental parameters, which in turn can affect growth and productivity of SO phytoplankton. Due to global warming, sea surface temperatures will increase and lead to a more stratified and shallower mixed layer resulting potentially in higher light availability and enhanced primary production of iron-limited phytoplankton. On the other hand, ocean acidification may reduce the bioavailability of iron to phytoplankton. To examine the influence of iron availability in combination with current and future higher CO2 concentrations under low and high irradiance on SO phytoplankton physiology, bottle manipulation experiments with a natural phytoplankton assemblage from the Drake Passage were conducted. Ocean acidification led to lowered abundances of Pseudo-nitzschia species at both irradiances. While higher irradiance stimulated daily particulate organic carbon production, this stimulating effect, however, was reduced under high pCO2, but only under iron-limitation. Moreover, the ratio of biogenic silicate to particulate organic carbon remained unchanged by high pCO2 for both iron treatments under high light, but declined under low light. Gaining more insight on the complex interplay of multiple environmental factors is valuable to predict future responses of SO phytoplankton to climate change. |
format |
Conference Object |
author |
Pausch, Franziska Heiden, Jasmin P. Koch, Florian Hassler, Christel S. Trimborn, Scarlett |
spellingShingle |
Pausch, Franziska Heiden, Jasmin P. Koch, Florian Hassler, Christel S. Trimborn, Scarlett Combined effects of light, CO2 and iron on Antarctic phytoplankton |
author_facet |
Pausch, Franziska Heiden, Jasmin P. Koch, Florian Hassler, Christel S. Trimborn, Scarlett |
author_sort |
Pausch, Franziska |
title |
Combined effects of light, CO2 and iron on Antarctic phytoplankton |
title_short |
Combined effects of light, CO2 and iron on Antarctic phytoplankton |
title_full |
Combined effects of light, CO2 and iron on Antarctic phytoplankton |
title_fullStr |
Combined effects of light, CO2 and iron on Antarctic phytoplankton |
title_full_unstemmed |
Combined effects of light, CO2 and iron on Antarctic phytoplankton |
title_sort |
combined effects of light, co2 and iron on antarctic phytoplankton |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/47447/ https://hdl.handle.net/10013/epic.76b5cd24-56a5-4f65-a3e9-14b25918014c |
geographic |
Antarctic Southern Ocean Drake Passage |
geographic_facet |
Antarctic Southern Ocean Drake Passage |
genre |
Antarc* Antarctic Drake Passage Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Ocean acidification Southern Ocean |
op_source |
EPIC3POLAR2018, Davos, Switzerland, 2018-06-19-2018-06-23 |
op_relation |
Pausch, F. orcid:0000-0002-4207-1304 , Heiden, J. P. , Koch, F. , Hassler, C. S. and Trimborn, S. orcid:0000-0003-1434-9927 (2018) Combined effects of light, CO2 and iron on Antarctic phytoplankton , POLAR2018, Davos, Switzerland, 19 June 2018 - 23 June 2018 . hdl:10013/epic.76b5cd24-56a5-4f65-a3e9-14b25918014c |
_version_ |
1766221255228260352 |