Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata
Ocean acidification (OA) is the reduction in seawater pH due to the absorption of human-released CO2 by the world’s oceans. The average surface oceanic pH is predicted to decline by 0.4 units by 2100. However, kelp metabolically modifies seawater pH via photosynthesis and respiration in some tempera...
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ftpubmed:oai:pubmedcentral.nih.gov:4882519 2023-05-15T17:50:29+02:00 Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata Britton, Damon Cornwall, Christopher E. Revill, Andrew T. Hurd, Catriona L. Johnson, Craig R. 2016-05-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882519/ http://www.ncbi.nlm.nih.gov/pubmed/27229624 https://doi.org/10.1038/srep26036 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882519/ http://www.ncbi.nlm.nih.gov/pubmed/27229624 http://dx.doi.org/10.1038/srep26036 Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/srep26036 2016-06-12T00:09:34Z Ocean acidification (OA) is the reduction in seawater pH due to the absorption of human-released CO2 by the world’s oceans. The average surface oceanic pH is predicted to decline by 0.4 units by 2100. However, kelp metabolically modifies seawater pH via photosynthesis and respiration in some temperate coastal systems, resulting in daily pH fluctuations of up to ±0.45 units. It is unknown how these fluctuations in pH influence the growth and physiology of the kelp, or how this might change with OA. In laboratory experiments that mimicked the most extreme pH fluctuations measured within beds of the canopy-forming kelp Ecklonia radiata in Tasmania, the growth and photosynthetic rates of juvenile E. radiata were greater under fluctuating pH (8.4 in the day, 7.8 at night) than in static pH treatments (8.4, 8.1, 7.8). However, pH fluctuations had no effect on growth rates and a negative effect on photosynthesis when the mean pH of each treatment was reduced by 0.3 units. Currently, pH fluctuations have a positive effect on E. radiata but this effect could be reversed in the future under OA, which is likely to impact the future ecological dynamics and productivity of habitats dominated by E. radiata. Text Ocean acidification PubMed Central (PMC) Scientific Reports 6 1 |
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Article Britton, Damon Cornwall, Christopher E. Revill, Andrew T. Hurd, Catriona L. Johnson, Craig R. Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata |
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Ocean acidification (OA) is the reduction in seawater pH due to the absorption of human-released CO2 by the world’s oceans. The average surface oceanic pH is predicted to decline by 0.4 units by 2100. However, kelp metabolically modifies seawater pH via photosynthesis and respiration in some temperate coastal systems, resulting in daily pH fluctuations of up to ±0.45 units. It is unknown how these fluctuations in pH influence the growth and physiology of the kelp, or how this might change with OA. In laboratory experiments that mimicked the most extreme pH fluctuations measured within beds of the canopy-forming kelp Ecklonia radiata in Tasmania, the growth and photosynthetic rates of juvenile E. radiata were greater under fluctuating pH (8.4 in the day, 7.8 at night) than in static pH treatments (8.4, 8.1, 7.8). However, pH fluctuations had no effect on growth rates and a negative effect on photosynthesis when the mean pH of each treatment was reduced by 0.3 units. Currently, pH fluctuations have a positive effect on E. radiata but this effect could be reversed in the future under OA, which is likely to impact the future ecological dynamics and productivity of habitats dominated by E. radiata. |
format |
Text |
author |
Britton, Damon Cornwall, Christopher E. Revill, Andrew T. Hurd, Catriona L. Johnson, Craig R. |
author_facet |
Britton, Damon Cornwall, Christopher E. Revill, Andrew T. Hurd, Catriona L. Johnson, Craig R. |
author_sort |
Britton, Damon |
title |
Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata |
title_short |
Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata |
title_full |
Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata |
title_fullStr |
Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata |
title_full_unstemmed |
Ocean acidification reverses the positive effects of seawater pH fluctuations on growth and photosynthesis of the habitat-forming kelp, Ecklonia radiata |
title_sort |
ocean acidification reverses the positive effects of seawater ph fluctuations on growth and photosynthesis of the habitat-forming kelp, ecklonia radiata |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882519/ http://www.ncbi.nlm.nih.gov/pubmed/27229624 https://doi.org/10.1038/srep26036 |
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Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882519/ http://www.ncbi.nlm.nih.gov/pubmed/27229624 http://dx.doi.org/10.1038/srep26036 |
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Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
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https://doi.org/10.1038/srep26036 |
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Scientific Reports |
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