Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L.
Stochastic upwelling of seawater in the Baltic Sea from the deep, anoxic bottoms may bring low-pH water rich in CO2 close to the surface. Such events may become more frequent with climate change and ongoing ocean acidification (OA). Photoautotrophs, such as macroalgae, which are important foundation...
Published in: | European Journal of Phycology |
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2020
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Online Access: | http://hdl.handle.net/10138/314482 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/314482 2024-01-07T09:45:43+01:00 Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. Takolander, Antti Cabeza, Mar Leskinen, Elina Helsinki Institute of Sustainability Science (HELSUS) Marine Ecosystems Research Group Tvärminne Zoological Station Ecology and Evolutionary Biology Mar Cabeza-Jaimejuan / Principal Investigator Organismal and Evolutionary Biology Research Programme Ecosystems and Environment Research Programme Global Change and Conservation Lab 2020-04-29T01:50:23Z 13 application/pdf http://hdl.handle.net/10138/314482 eng eng Taylor & Francis 10.1080/09670262.2019.1572226 This study was funded by Societas pro Fauna et Flora Fennica, Oskar Oflunds Stiftelse and the Finnish Foundation for Nature Conservation. Takolander , A , Cabeza , M & Leskinen , E 2019 , ' Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. ' , European Journal of Phycology , vol. 54 , no. 3 , pp. 380-392 . https://doi.org/10.1080/09670262.2019.1572226 ORCID: /0000-0002-7410-7631/work/68615156 ORCID: /0000-0002-9237-3765/work/68616198 7c79dbe2-d60d-4cdb-9de6-cf14425ff664 http://hdl.handle.net/10138/314482 000471538800001 unspecified openAccess info:eu-repo/semantics/openAccess Baltic Sea climate change CO2 Fucus vesiculosus ocean acidification PAM fluorometry INORGANIC CARBON CLIMATE-CHANGE CONCENTRATING MECHANISMS NATURAL ASSEMBLAGES RISING CO2 GROWTH LIGHT TEMPERATURE 1172 Environmental sciences 1181 Ecology evolutionary biology Article acceptedVersion 2020 ftunivhelsihelda 2023-12-14T00:06:58Z Stochastic upwelling of seawater in the Baltic Sea from the deep, anoxic bottoms may bring low-pH water rich in CO2 close to the surface. Such events may become more frequent with climate change and ongoing ocean acidification (OA). Photoautotrophs, such as macroalgae, which are important foundation species, have been proposed to benefit from increased carbon availability due to reduced energetic cost in carbon acquisition. However, the exact effects of CO2 fertilization may depend on the ambient light environment, as photosynthesis rates depend on available irradiance. In this experimental study, interacting effects of CO2 addition and irradiance on the habitat-forming macroalga Fucus vesiculosus were investigated during two seasons - winter and summer - in the northern Baltic Sea. Growth rates remained unaffected by CO2 or irradiance during both seasons, suggesting that direct effects of elevated CO2 on mature F. vesiculosus are small. Increases in CO2 affected algal elemental ratios by increasing carbon and decreasing nitrogen content, with resulting changes in the C:N ratio, but only in winter. In summer, chlorophyll a content increased under low irradiance. Increases in CO2 caused a decline in light-harvesting efficiency (decrease in F-v/F-m and alpha) under high irradiance in summer, and conversely increased alpha under low irradiance. High irradiance caused increases in the maximum relative electron transport rate (rETR(max)) in summer, but not in winter. Differences between winter and summer indicate that F. vesiculosus responses to CO2 and irradiance are season-specific. Increases in carbon content during winter could indicate slightly positive effects of CO2 addition in the long run if the extra carbon gained may be capitalized in growth. The results of this study suggest that increases in CO2, either through upwelling or OA, may have positive effects on F. vesiculosus, but these effects are probably small. Peer reviewed Article in Journal/Newspaper Ocean acidification HELDA – University of Helsinki Open Repository European Journal of Phycology 54 3 380 392 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Baltic Sea climate change CO2 Fucus vesiculosus ocean acidification PAM fluorometry INORGANIC CARBON CLIMATE-CHANGE CONCENTRATING MECHANISMS NATURAL ASSEMBLAGES RISING CO2 GROWTH LIGHT TEMPERATURE 1172 Environmental sciences 1181 Ecology evolutionary biology |
spellingShingle |
Baltic Sea climate change CO2 Fucus vesiculosus ocean acidification PAM fluorometry INORGANIC CARBON CLIMATE-CHANGE CONCENTRATING MECHANISMS NATURAL ASSEMBLAGES RISING CO2 GROWTH LIGHT TEMPERATURE 1172 Environmental sciences 1181 Ecology evolutionary biology Takolander, Antti Cabeza, Mar Leskinen, Elina Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. |
topic_facet |
Baltic Sea climate change CO2 Fucus vesiculosus ocean acidification PAM fluorometry INORGANIC CARBON CLIMATE-CHANGE CONCENTRATING MECHANISMS NATURAL ASSEMBLAGES RISING CO2 GROWTH LIGHT TEMPERATURE 1172 Environmental sciences 1181 Ecology evolutionary biology |
description |
Stochastic upwelling of seawater in the Baltic Sea from the deep, anoxic bottoms may bring low-pH water rich in CO2 close to the surface. Such events may become more frequent with climate change and ongoing ocean acidification (OA). Photoautotrophs, such as macroalgae, which are important foundation species, have been proposed to benefit from increased carbon availability due to reduced energetic cost in carbon acquisition. However, the exact effects of CO2 fertilization may depend on the ambient light environment, as photosynthesis rates depend on available irradiance. In this experimental study, interacting effects of CO2 addition and irradiance on the habitat-forming macroalga Fucus vesiculosus were investigated during two seasons - winter and summer - in the northern Baltic Sea. Growth rates remained unaffected by CO2 or irradiance during both seasons, suggesting that direct effects of elevated CO2 on mature F. vesiculosus are small. Increases in CO2 affected algal elemental ratios by increasing carbon and decreasing nitrogen content, with resulting changes in the C:N ratio, but only in winter. In summer, chlorophyll a content increased under low irradiance. Increases in CO2 caused a decline in light-harvesting efficiency (decrease in F-v/F-m and alpha) under high irradiance in summer, and conversely increased alpha under low irradiance. High irradiance caused increases in the maximum relative electron transport rate (rETR(max)) in summer, but not in winter. Differences between winter and summer indicate that F. vesiculosus responses to CO2 and irradiance are season-specific. Increases in carbon content during winter could indicate slightly positive effects of CO2 addition in the long run if the extra carbon gained may be capitalized in growth. The results of this study suggest that increases in CO2, either through upwelling or OA, may have positive effects on F. vesiculosus, but these effects are probably small. Peer reviewed |
author2 |
Helsinki Institute of Sustainability Science (HELSUS) Marine Ecosystems Research Group Tvärminne Zoological Station Ecology and Evolutionary Biology Mar Cabeza-Jaimejuan / Principal Investigator Organismal and Evolutionary Biology Research Programme Ecosystems and Environment Research Programme Global Change and Conservation Lab |
format |
Article in Journal/Newspaper |
author |
Takolander, Antti Cabeza, Mar Leskinen, Elina |
author_facet |
Takolander, Antti Cabeza, Mar Leskinen, Elina |
author_sort |
Takolander, Antti |
title |
Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. |
title_short |
Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. |
title_full |
Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. |
title_fullStr |
Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. |
title_full_unstemmed |
Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. |
title_sort |
seasonal interactive effects of pco(2) and irradiance on the ecophysiology of brown macroalga fucus vesiculosus l. |
publisher |
Taylor & Francis |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/314482 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
10.1080/09670262.2019.1572226 This study was funded by Societas pro Fauna et Flora Fennica, Oskar Oflunds Stiftelse and the Finnish Foundation for Nature Conservation. Takolander , A , Cabeza , M & Leskinen , E 2019 , ' Seasonal interactive effects of pCO(2) and irradiance on the ecophysiology of brown macroalga Fucus vesiculosus L. ' , European Journal of Phycology , vol. 54 , no. 3 , pp. 380-392 . https://doi.org/10.1080/09670262.2019.1572226 ORCID: /0000-0002-7410-7631/work/68615156 ORCID: /0000-0002-9237-3765/work/68616198 7c79dbe2-d60d-4cdb-9de6-cf14425ff664 http://hdl.handle.net/10138/314482 000471538800001 |
op_rights |
unspecified openAccess info:eu-repo/semantics/openAccess |
container_title |
European Journal of Phycology |
container_volume |
54 |
container_issue |
3 |
container_start_page |
380 |
op_container_end_page |
392 |
_version_ |
1787427310287192064 |