Seasonal variations of Fucus vesiculosus photophysiological performance (Kiel Outdoor Benthocosms)
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| Main Authors: | , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2021
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| _version_ | 1867167679160254464 |
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| author | Graiff, Angelika Bartsch, Inka Glaser, Karin Karsten, Ulf |
| author_facet | Graiff, Angelika Bartsch, Inka Glaser, Karin Karsten, Ulf |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Shallow coastal marine ecosystems are exposed to intensive warming events in the last decade, threatening keystone macroalgal species such as the bladder wrack (Fucus vesiculosus, Phaeophyceae) in the Baltic Sea. Herein, we experimentally tested in four consecutive benthic mesocosm experiments, if the single and combined impact of elevated seawater temperature (? + 5◦C) and pCO2 (1100 ppm) under natural irradiance conditions seasonally affected the photophysiological performance (i.e., oxygen production, in vivo chlorophyll a fluorescence, energy dissipation pathways and chlorophyll concentration) of Baltic Sea Fucus. Photosynthesis was highest in spring/early summer when water temperature and solar irradiance increases naturally, and was lowest in winter (December to January/February). Temperature had a stronger effect than pCO2 on photosynthetic performance of Fucus in all seasons. In contrast to the expectation that warmer winter conditions might be beneficial, elevated temperature conditions and sub-optimal low winter light conditions decreased photophysiological performance of Fucus. In summer, western Baltic Sea Fucus already lives close to its upper thermal tolerance limit and future warming of the Baltic Sea during summer may probably become deleterious for this species. However, our results indicate that over most of the year a combination of future ocean warming and increased pCO2 will have slightly positive effects for Fucus photophysiological performance. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_933410 |
| institution | PANGAEA |
| language | en |
| publishDate | 2021 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seasonal variations of Fucus vesiculosus photophysiological performance (Kiel Outdoor Benthocosms) Graiff, Angelika Bartsch, Inka Glaser, Karin Karsten, Ulf BIOACID; Biological Impacts of Ocean Acidification; chlorophyll fluorescence; mesocosm; Photosynthesis Shallow coastal marine ecosystems are exposed to intensive warming events in the last decade, threatening keystone macroalgal species such as the bladder wrack (Fucus vesiculosus, Phaeophyceae) in the Baltic Sea. Herein, we experimentally tested in four consecutive benthic mesocosm experiments, if the single and combined impact of elevated seawater temperature (? + 5◦C) and pCO2 (1100 ppm) under natural irradiance conditions seasonally affected the photophysiological performance (i.e., oxygen production, in vivo chlorophyll a fluorescence, energy dissipation pathways and chlorophyll concentration) of Baltic Sea Fucus. Photosynthesis was highest in spring/early summer when water temperature and solar irradiance increases naturally, and was lowest in winter (December to January/February). Temperature had a stronger effect than pCO2 on photosynthetic performance of Fucus in all seasons. In contrast to the expectation that warmer winter conditions might be beneficial, elevated temperature conditions and sub-optimal low winter light conditions decreased photophysiological performance of Fucus. In summer, western Baltic Sea Fucus already lives close to its upper thermal tolerance limit and future warming of the Baltic Sea during summer may probably become deleterious for this species. However, our results indicate that over most of the year a combination of future ocean warming and increased pCO2 will have slightly positive effects for Fucus photophysiological performance. |
| title | Seasonal variations of Fucus vesiculosus photophysiological performance (Kiel Outdoor Benthocosms) |
| topic | BIOACID; Biological Impacts of Ocean Acidification; chlorophyll fluorescence; mesocosm; Photosynthesis |
| url | https://doi.org/10.1594/PANGAEA.933410 |