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Skeletal trade-offs in coralline algae in response to ocean acidification (2014)

McCoy, Sophie J ; Ragazzola, Federica

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In: Supplement to: McCoy, Sophie J; Ragazzola, Federica (2014): Skeletal trade-offs in coralline algae in response to ocean acidification. Nature Climate Change, 4(8), 719-723, https://doi.org/10.1038/nclimate2273

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Publication Date: 2023-01-13

Description: Ocean acidification is changing the marine environment, with potentially serious consequences for many organisms. Much of our understanding of ocean acidification effects comes from laboratory experiments, which demonstrate physiological responses over relatively short timescales. Observational studies and, more recently, experimental studies in natural systems suggest that ocean acidification will alter the structure of seaweed communities. Here, we provide a mechanistic understanding of altered competitive dynamics among a group of seaweeds, the crustose coralline algae (CCA). We compare CCA from historical experiments (1981-1997) with specimens from recent, identical experiments (2012) to describe morphological changes over this time period, which coincides with acidification of seawater in the Northeastern Pacific. Traditionally thick species decreased in thickness by a factor of 2.0-2.3, but did not experience a change in internal skeletal metrics. In contrast, traditionally thin species remained approximately the same thickness but reduced their total carbonate tissue by making thinner inter-filament cell walls. These changes represent alternative mechanisms for the reduction of calcium carbonate production in CCA and suggest energetic trade-offs related to the cost of building and maintaining a calcium carbonate skeleton as pH declines. Our classification of stress response by morphological type may be generalizable to CCA at other sites, as well as to other calcifying organisms with species-specific differences in morphological types.

Type: Dataset

Format: application/zip, 2 datasets

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Historical and recent cell wall thickness of coralline algae (2014)

McCoy, Sophie J ; Ragazzola, Federica

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Publication Date: 2023-01-13

Keywords: Coralline algae, wall thickness, inter filament; Coralline algae, wall thickness, intra filament; Identification; Species; Time point, descriptive

Type: Dataset

Format: text/tab-separated-values, 2179 data points

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Historical and recent thallus thickness (2014)

McCoy, Sophie J ; Ragazzola, Federica

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Publication Date: 2023-01-13

Keywords: Comment; Species; Thallus thickness; Time point, descriptive

Type: Dataset

Format: text/tab-separated-values, 1837 data points

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Understanding the margin squeeze: Differentiation in fitness-related traits between central and trailing edge populations of Corallina officinalis (2019)

Kolzenburg, Regina ; Nicastro, Katy R ; McCoy, Sophie J ; [et al.]

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Publication Date: 2023-11-02

Description: Assessing population responses to climate‐related environmental change is key to understanding the adaptive potential of the species as a whole. Coralline algae are critical components of marine shallow water ecosystems where they function as important ecosystem engineers. Populations of the calcifying algae Corallina officinalis from the centre (southern UK) and periphery (northern Spain) of the North Atlantic species natural distribution were selected to test for functional differentiation in thermal stress response. Physiological measurements of calcification, photosynthesis, respiration, growth rates, oxygen and calcification evolution curves were performed using closed cell respirometry methods. Species identity was genetically confirmed via DNA barcoding. Through a common garden approach, we identified distinct vulnerability to thermal stress of central and peripheral populations. Southern populations showed a decrease in photosynthetic rate under environmental conditions of central locations and central populations showed a decline in calcification rates under southern conditions. This shows that the two processes of calcification and photosynthesis are not as tightly coupled as previously assumed. How the species as whole will react to future climatic changes will be determined by the interplay of local environmental conditions and these distinct population adaptive traits.

Keywords: calcification; Climate change; common garden experiment; coralline algae; intertidal; Photosynthesis; P-I curve; uncoupling

Type: Dataset

Format: application/pdf, 266.3 kBytes

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Seawater carbonate chemistry and growth and photophysiology of two tropical reef macroalgae (2024)

Page, Heather N ; McCoy, Sophie J ; Spencer, Robert G M ; [et al.]

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Publication Date: 2024-03-15

Description: Focusing on algal taxa from two different functional groups on Caribbean coral reefs, we exposed fleshy (Dictyota spp.) and calcifying (Halimeda tuna) macroalgae to ambient and low seawater pH for 25 days in an outdoor experimental system in the Florida Keys. We quantified algal growth, calcification, photophysiology, and DOC production across pH treatments.

Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Bottles or small containers/Aquaria (〈20 L); Buoyant mass; Calcification/Dissolution; Calcification rate; Calcification rate, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Calculated using seacarb after Orr et al. (2018); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Carotenoids; Carotenoids, standard deviation; Chlorophyll a; Chlorophyll a, standard deviation; Chlorophyll b; Chlorophyll b, standard deviation; Chlorophyta; Chromista; Coast and continental shelf; Dictyota sp.; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Fugacity of carbon dioxide in seawater, standard deviation; Growth/Morphology; Halimeda tuna; Laboratory experiment; Macroalgae; Mass, standard deviation; Maximum quantum yield of photosystem II; Maximum quantum yield of photosystem II, standard deviation; Net calcification rate of calcium carbonate, dark; Net calcification rate of calcium carbonate, light; Net photosynthesis rate, oxygen; Net photosynthesis rate, standard deviation; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Ochrophyta; Oxygen, dissolved; Oxygen, dissolved, standard deviation; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Plantae; Primary production/Photosynthesis; Respiration; Respiration rate, oxygen; Respiration rate, oxygen, standard deviation; Salinity; Salinity, standard deviation; Single species; Species; Surface area; Surface area, standard deviation; Temperate; Temperature, water; Temperature, water, standard deviation; Treatment; Type of study; Wet mass; Wet mass, standard deviation

Type: Dataset

Format: text/tab-separated-values, 240 data points

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Seawater carbonate chemistry and primary production, respiration, calcification and growth rates of 6 populations of coralline alga Corallina officinalis (2021)

Kolzenburg, Regina ; D'Amore, Francesco ; McCoy, Sophie J ; [et al.]

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Publication Date: 2024-03-15

Description: Rising levels of anthropogenic carbon dioxide (CO2) in the atmosphere over the past several decades has resulted in a changing climate and is projected to further fuel global climate change in future centuries. Key components of climate change in the ocean are ocean acidification (decreasing pH and carbonate ion concentration [ CO32- ]) and rising sea surface temperatures. While several studies have investigated the effect of these climatic changes on a single population, very few studies have addressed effects on populations living at the margins of their species distribution and the full distributional range. This gap in knowledge impedes the determination of detailed predictions for most species' futures. Over the course of four months, we investigated physiological changes (primary production, respiration, calcification and growth rates) of 6 populations of the intertidal ecosystem engineer and articulated coralline alga Corallina officinalis to future climatic conditions (low pH (∼7.8); T + 3 °C; as well as the combination of low pH and T + 3 °C). The populations (n = 2 per geographical location) represent the northern (Iceland) and southern (Spain) margins, as well as the centre (England) of the species distribution in the NE Atlantic. Here, we show that southern and central populations are already living closer to their thermal and stress limits, while Northern populations appear to be the most resilient to environmental changes. We present data confirming light calcification to be the most valuable physiological process which is prioritized in populations throughout the geographical gradient in the NE Atlantic. We found elevated temperature to have a greater effect on populations than pCO2. Investigating and monitoring organism physiology and structure under these extreme environmental conditions provides important information to predict their acclimatisation and resilience to future environmental conditions and potential changes in their distribution.

Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcification rate, standard error; Calcification rate of calcium carbonate, per dry mass; Calcite saturation state; Calcite saturation state, standard deviation; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Corallina officinalis; Event label; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard error; Illa_del_Arousa; Laboratory experiment; Location; Macroalgae; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Plantae; Polar; Population; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Primary production of oxygen, per dry mass; Primary production of oxygen, standard error; Registration number of species; Respiration; Respiration rate, oxygen, per dry mass; Respiration rate, oxygen, standard error; Rhodophyta; Salinity; Salinity, standard deviation; Single species; Species; St_Margarets_Bay; Stafnes_North; Stafnes_South; Temperate; Temperature; Temperature, water; Temperature, water, standard deviation; Tragove; Treatment; Type; Uniform resource locator/link to reference; Westbrook_Bay

Type: Dataset

Format: text/tab-separated-values, 1048 data points

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Two intertidal, non-calcifying macroalgae (Palmaria palmata and Saccharina latissima) show complex and variable responses to short-term CO2 acidification (2016)

Nunes, Joana ; McCoy, Sophie J ; Findlay, Helen S ; [et al.]

PANGAEA

In: Supplement to: Nunes, Joana; McCoy, Sophie J; Findlay, Helen S; Hopkins, Frances E; Kitidis, Vassilis; Queirós, Ana M; Rayner, Lucy; Widdicombe, Stephen (2016): Two intertidal, non-calcifying macroalgae (Palmaria palmata and Saccharina latissima) show complex and variable responses to short-term CO2 acidification. ICES Journal of Marine Science, 73(3), 887-896, https://doi.org/10.1093/icesjms/fsv081

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Publication Date: 2024-03-15

Description: Ocean acidification, the result of increased dissolution of carbon dioxide (CO2) in seawater, is a leading subject of current research. The effects of acidification on non-calcifying macroalgae are, however, still unclear. The current study reports two 1-month studies using two different macroalgae, the red alga Palmaria palmata (Rhodophyta) and the kelp Saccharina latissima (Phaeophyta), exposed to control (pHNBS = 8.04) and increased (pHNBS = 7.82) levels of CO2-induced seawater acidification. The impacts of both increased acidification and time of exposure on net primary production (NPP), respiration (R), dimethylsulphoniopropionate (DMSP) concentrations, and algal growth have been assessed. In P. palmata, although NPP significantly increased during the testing period, it significantly decreased with acidification, whereas R showed a significant decrease with acidification only. S. latissima significantly increased NPP with acidification but not with time, and significantly increased R with both acidification and time, suggesting a concomitant increase in gross primary production. The DMSP concentrations of both species remained unchanged by either acidification or through time during the experimental period. In contrast, algal growth differed markedly between the two experiments, in that P. palmata showed very little growth throughout the experiment, while S. latissima showed substantial growth during the course of the study, with the latter showing a significant difference between the acidified and control treatments. These two experiments suggest that the study species used here were resistant to a short-term exposure to ocean acidification, with some of the differences seen between species possibly linked to different nutrient concentrations between the experiments.

Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Ammonium; Aragonite saturation state; Area; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Chromista; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Dimethylsulfoniopropionate; Duration, number of days; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross primary production of oxygen; Growth/Morphology; Height; Identification; Laboratory experiment; Macroalgae; Migration; Mount_Batten_OA; Net primary production of oxygen; Nitrate; Nitrate and Nitrite; Nitrite; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Ochrophyta; Other metabolic rates; Palmaria palmata; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Phosphate; Plantae; Position; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Registration number of species; Respiration; Respiration, oxygen; Rhodophyta; Saccharina latissima; Salinity; Salinity, standard deviation; Silicate; Single species; Species; Temperate; Temperature, water; Temperature, water, standard deviation; Treatment; Type; Uniform resource locator/link to reference; Width

Type: Dataset

Format: text/tab-separated-values, 13295 data points

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Responses of benthic calcifying algae to ocean acidification differ between laboratory and field settings (2022)

Page, Heather N. ; Bahr, Keisha D. ; Cyronak, Tyler J. ; [et al.]

Oxford University Press

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Publication Date: 2022-06-24

Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Page, H. N., Bahr, K. D., Cyronak, T., Jewett, E. B., Johnson, M. D., & McCoy, S. J. Responses of benthic calcifying algae to ocean acidification differ between laboratory and field settings. Ices Journal of Marine Science, 79(1), (2022): 1–11, https://doi.org/10.1093/icesjms/fsab232.

Description: Accurately predicting the effects of ocean and coastal acidification on marine ecosystems requires understanding how responses scale from laboratory experiments to the natural world. Using benthic calcifying macroalgae as a model system, we performed a semi-quantitative synthesis to compare directional responses between laboratory experiments and field studies. Variability in ecological, spatial, and temporal scales across studies, and the disparity in the number of responses documented in laboratory and field settings, make direct comparisons difficult. Despite these differences, some responses, including community-level measurements, were consistent across laboratory and field studies. However, there were also mismatches in the directionality of many responses with more negative acidification impacts reported in laboratory experiments. Recommendations to improve our ability to scale responses include: (i) developing novel approaches to allow measurements of the same responses in laboratory and field settings, and (ii) researching understudied calcifying benthic macroalgal species and responses. Incorporating these guidelines into research programs will yield data more suitable for robust meta-analyses and will facilitate the development of ecosystem models that incorporate proper scaling of organismal responses to in situ acidification. This, in turn, will allow for more accurate predictions of future changes in ecosystem health and function in a rapidly changing natural climate.

Description: We would like to thank the Ocean Carbon and Biogeochemistry Program for organizing the fourth U.S. Ocean Acidification Principal Investigators meeting, which is where this synthesis was conceived. HNP was a postdoctoral research fellow at Mote Marine Laboratory. MDJ is a postdoctoral scholar at Woods Hole Oceanographic Institution. SJM is a Norma J. Lang early career fellow of the Phycological Society of America.

Repository Name: Woods Hole Open Access Server

Type: Article

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