Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios
In coastal marine environments, physical and biological forces can cause dynamic pH fluctuations from microscale (diffusive boundary layer [DBL]) up to ecosystem‐scale (benthic boundary layer [BBL]). In the face of ocean acidification (OA), such natural pH variations may modulate an organism's...
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ftdatacite:10.23689/fidgeo-4067 2023-05-15T17:50:42+02:00 Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios Johnson, Mildred Jessica Hennigs, Laura Margarethe Sawall, Yvonne Pansch, Christian Wall, Marlene 2020 https://dx.doi.org/10.23689/fidgeo-4067 https://e-docs.geo-leo.de/handle/11858/8407 en eng John Wiley & Sons, Inc. Text Article article-journal ScholarlyArticle 2020 ftdatacite https://doi.org/10.23689/fidgeo-4067 2021-11-05T12:55:41Z In coastal marine environments, physical and biological forces can cause dynamic pH fluctuations from microscale (diffusive boundary layer [DBL]) up to ecosystem‐scale (benthic boundary layer [BBL]). In the face of ocean acidification (OA), such natural pH variations may modulate an organism's response to OA by providing temporal refugia. We investigated the effect of pH fluctuations, generated by the brown alga Fucus serratus' biological activity, on the calcifying epibionts Balanus improvisus and Electra pilosa under OA. For this, both epibionts were grown on inactive and biologically active surfaces and exposed to (1) constant pH scenarios under ambient (pH 8.1) or OA conditions (pH 7.7), or (2) oscillating pH scenarios mimicking BBL conditions at ambient (pH 7.7–8.6) or OA scenarios (pH 7.4–8.2). Furthermore, all treatment combinations were tested at 10°C and 15°C. Against our expectations, OA treatments did not affect epibiont growth under constant or fluctuating (BBL) pH conditions, indicating rather high robustness against predicted OA scenarios. Furthermore, epibiont growth was hampered and not fostered on active surfaces (fluctuating DBL conditions), indicating that fluctuating pH conditions of the DBL with elevated daytime pH do not necessarily provide temporal refugia from OA. In contrast, results indicate that factors other than pH may play larger roles for epibiont growth on macrophytes (e.g., surface characteristics, macrophyte antifouling defense, or dynamics of oxygen and nutrient concentrations). Warming enhanced epibiont growth rates significantly, independently of OA, indicating no synergistic effects of pH treatments and temperature within their natural temperature range. : Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659 Text Ocean acidification DataCite Metadata Store (German National Library of Science and Technology) |
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English |
description |
In coastal marine environments, physical and biological forces can cause dynamic pH fluctuations from microscale (diffusive boundary layer [DBL]) up to ecosystem‐scale (benthic boundary layer [BBL]). In the face of ocean acidification (OA), such natural pH variations may modulate an organism's response to OA by providing temporal refugia. We investigated the effect of pH fluctuations, generated by the brown alga Fucus serratus' biological activity, on the calcifying epibionts Balanus improvisus and Electra pilosa under OA. For this, both epibionts were grown on inactive and biologically active surfaces and exposed to (1) constant pH scenarios under ambient (pH 8.1) or OA conditions (pH 7.7), or (2) oscillating pH scenarios mimicking BBL conditions at ambient (pH 7.7–8.6) or OA scenarios (pH 7.4–8.2). Furthermore, all treatment combinations were tested at 10°C and 15°C. Against our expectations, OA treatments did not affect epibiont growth under constant or fluctuating (BBL) pH conditions, indicating rather high robustness against predicted OA scenarios. Furthermore, epibiont growth was hampered and not fostered on active surfaces (fluctuating DBL conditions), indicating that fluctuating pH conditions of the DBL with elevated daytime pH do not necessarily provide temporal refugia from OA. In contrast, results indicate that factors other than pH may play larger roles for epibiont growth on macrophytes (e.g., surface characteristics, macrophyte antifouling defense, or dynamics of oxygen and nutrient concentrations). Warming enhanced epibiont growth rates significantly, independently of OA, indicating no synergistic effects of pH treatments and temperature within their natural temperature range. : Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659 |
format |
Text |
author |
Johnson, Mildred Jessica Hennigs, Laura Margarethe Sawall, Yvonne Pansch, Christian Wall, Marlene |
spellingShingle |
Johnson, Mildred Jessica Hennigs, Laura Margarethe Sawall, Yvonne Pansch, Christian Wall, Marlene Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios |
author_facet |
Johnson, Mildred Jessica Hennigs, Laura Margarethe Sawall, Yvonne Pansch, Christian Wall, Marlene |
author_sort |
Johnson, Mildred Jessica |
title |
Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios |
title_short |
Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios |
title_full |
Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios |
title_fullStr |
Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios |
title_full_unstemmed |
Growth response of calcifying marine epibionts to biogenic pH fluctuations and global ocean acidification scenarios |
title_sort |
growth response of calcifying marine epibionts to biogenic ph fluctuations and global ocean acidification scenarios |
publisher |
John Wiley & Sons, Inc. |
publishDate |
2020 |
url |
https://dx.doi.org/10.23689/fidgeo-4067 https://e-docs.geo-leo.de/handle/11858/8407 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_doi |
https://doi.org/10.23689/fidgeo-4067 |
_version_ |
1766157568441319424 |