The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta)
Calcified macroalgae are critical components of marine ecosystems worldwide, but face considerable threat both from climate change (increasing water temperatures) and ocean acidification (decreasing ocean pH and carbonate saturation). It is thus fundamental to constrain the relationships between key...
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ftcopernicus:oai:publications.copernicus.org:bg58430 2023-05-15T17:52:06+02:00 The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta) Williamson, Christopher James Perkins, Rupert Voller, Matthew Yallop, Marian Louise Brodie, Juliet 2018-09-27 application/pdf https://doi.org/10.5194/bg-14-4485-2017 https://www.biogeosciences.net/14/4485/2017/ eng eng doi:10.5194/bg-14-4485-2017 https://www.biogeosciences.net/14/4485/2017/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-14-4485-2017 2019-12-24T09:50:58Z Calcified macroalgae are critical components of marine ecosystems worldwide, but face considerable threat both from climate change (increasing water temperatures) and ocean acidification (decreasing ocean pH and carbonate saturation). It is thus fundamental to constrain the relationships between key abiotic stressors and the physiological processes that govern coralline algal growth and survival. Here we characterize the complex relationships between the abiotic environment of rock pool habitats and the physiology of the geniculate red coralline alga, Corallina officinalis (Corallinales, Rhodophyta). Paired assessment of irradiance, water temperature and carbonate chemistry, with C. officinalis net production ( NP ), respiration ( R ) and net calcification ( NG ) was performed in a south-western UK field site, at multiple temporal scales (seasonal, diurnal and tidal). Strong seasonality was observed in NP and night-time R , with a P max of 22.35 µmol DIC (g DW) −1 h −1 , E k of 300 µmol photons m −2 s −1 and R of 3.29 µmol DIC (g DW) −1 h −1 determined across the complete annual cycle. NP showed a significant exponential relationship with irradiance ( R 2 = 0.67), although was temperature dependent given ambient irradiance > E k for the majority of the annual cycle. Over tidal emersion periods, dynamics in NP highlighted the ability of C. officinalis to acquire inorganic carbon despite significant fluctuations in carbonate chemistry. Across all data, NG was highly predictable ( R 2 = 0.80) by irradiance, water temperature and carbonate chemistry, providing a NG max of 3.94 µmol CaCO 3 (g DW) −1 h −1 and E k of 113 µmol photons m −2 s −1 . Light NG showed strong seasonality and significant coupling to NP ( R 2 = 0.65) as opposed to rock pool water carbonate saturation. In contrast, the direction of dark NG (dissolution vs. precipitation) was strongly related to carbonate saturation, mimicking abiotic precipitation dynamics. Data demonstrated that C. officinalis is adapted to both long-term (seasonal) and short-term (tidal) variability in environmental stressors, although the balance between metabolic processes and the external environment may be significantly impacted by future climate change. Text Ocean acidification Copernicus Publications: E-Journals Biogeosciences 14 19 4485 4498 |
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English |
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Calcified macroalgae are critical components of marine ecosystems worldwide, but face considerable threat both from climate change (increasing water temperatures) and ocean acidification (decreasing ocean pH and carbonate saturation). It is thus fundamental to constrain the relationships between key abiotic stressors and the physiological processes that govern coralline algal growth and survival. Here we characterize the complex relationships between the abiotic environment of rock pool habitats and the physiology of the geniculate red coralline alga, Corallina officinalis (Corallinales, Rhodophyta). Paired assessment of irradiance, water temperature and carbonate chemistry, with C. officinalis net production ( NP ), respiration ( R ) and net calcification ( NG ) was performed in a south-western UK field site, at multiple temporal scales (seasonal, diurnal and tidal). Strong seasonality was observed in NP and night-time R , with a P max of 22.35 µmol DIC (g DW) −1 h −1 , E k of 300 µmol photons m −2 s −1 and R of 3.29 µmol DIC (g DW) −1 h −1 determined across the complete annual cycle. NP showed a significant exponential relationship with irradiance ( R 2 = 0.67), although was temperature dependent given ambient irradiance > E k for the majority of the annual cycle. Over tidal emersion periods, dynamics in NP highlighted the ability of C. officinalis to acquire inorganic carbon despite significant fluctuations in carbonate chemistry. Across all data, NG was highly predictable ( R 2 = 0.80) by irradiance, water temperature and carbonate chemistry, providing a NG max of 3.94 µmol CaCO 3 (g DW) −1 h −1 and E k of 113 µmol photons m −2 s −1 . Light NG showed strong seasonality and significant coupling to NP ( R 2 = 0.65) as opposed to rock pool water carbonate saturation. In contrast, the direction of dark NG (dissolution vs. precipitation) was strongly related to carbonate saturation, mimicking abiotic precipitation dynamics. Data demonstrated that C. officinalis is adapted to both long-term (seasonal) and short-term (tidal) variability in environmental stressors, although the balance between metabolic processes and the external environment may be significantly impacted by future climate change. |
format |
Text |
author |
Williamson, Christopher James Perkins, Rupert Voller, Matthew Yallop, Marian Louise Brodie, Juliet |
spellingShingle |
Williamson, Christopher James Perkins, Rupert Voller, Matthew Yallop, Marian Louise Brodie, Juliet The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta) |
author_facet |
Williamson, Christopher James Perkins, Rupert Voller, Matthew Yallop, Marian Louise Brodie, Juliet |
author_sort |
Williamson, Christopher James |
title |
The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta) |
title_short |
The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta) |
title_full |
The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta) |
title_fullStr |
The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta) |
title_full_unstemmed |
The regulation of coralline algal physiology, an in situ study of Corallina officinalis (Corallinales, Rhodophyta) |
title_sort |
regulation of coralline algal physiology, an in situ study of corallina officinalis (corallinales, rhodophyta) |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-14-4485-2017 https://www.biogeosciences.net/14/4485/2017/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-14-4485-2017 https://www.biogeosciences.net/14/4485/2017/ |
op_doi |
https://doi.org/10.5194/bg-14-4485-2017 |
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Biogeosciences |
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14 |
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19 |
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4485 |
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4498 |
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