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Physiological measurements from laboratory experiments on the effects of temperature and ocean acidification stressors on Desmophyllum dianthus

Title

Physiological measurements (respiration, calcification, ammonia excretion) from laboratory experiments on the effects of temperature and ocean acidification stressors on Desmophyllum dianthus (Data from Gori et al 2016).

Author(s) Gori A. (1); Ferrier-Pagès C. (1); Hennige S. (2); Murray F. (2); Rottier C. (1); Wicks L. (2); Roberts J.M. (2)

(1) Monaco Scientific Centre; (2) Heriot-Watt University Institute of Life and Earth Sciences

Subject biota, geoscientificInformation, oceans, environment
Abstract

Rising temperatures and ocean acidification driven by anthropogenic carbon emissions threaten both tropical and temperate corals. However, the synergistic effect of these stressors on coral physiology is still poorly understood, in particular for cold-water corals. This study assessed changes in key physiological parameters (calcification, respiration and ammonium excretion) of the widespread cold-water coral Desmophyllum dianthus maintained for ∼8 months at two temperatures (ambient 12°C and elevated 15°C) and two pCO2 conditions (ambient 390 ppm and elevated 750 ppm). At ambient temperatures no change in instantaneous calcification, respiration or ammonium excretion rates was observed at either pCO2 levels. Conversely, elevated temperature (15°C) significantly reduced calcification rates, and combined elevated temperature and pCO2 significantly reduced respiration rates. Changes in the ratio of respired oxygen to excreted nitrogen (O:N), which provides information on the main sources of energy being metabolized, indicated a shift from mixed use of protein and carbohydrate/lipid as metabolic substrates under control conditions, to less efficient protein-dominated catabolism under both stressors. Overall, this study shows that the physiology of D. dianthus is more sensitive to thermal than pCO2 stress, and that the predicted combination of rising temperatures and ocean acidification in the coming decades may severely impact this cold-water coral species.

Temporal coverage September 2013 - July 2015
Spatial coverage Adriatic Sea
File format Delimited
Language English
Discovery metadata record Link to the related European Directory of Marine Environmental Data (EDMED) record
Publisher British Oceanographic Data Centre - Natural Environment Research Council, UK
Publication date 07 December 2017
Digital Object Identifier (DOI) doi:10.5285/5fbfe17b-3d18-2663-e053-6c86abc0b953
Short DOI doi:10/cg95
Citation text Gori A.; Ferrier-Pagès C.; Hennige S.; Murray F.; Rottier C.; Wicks L.; Roberts J.M.(2017). Physiological measurements (respiration, calcification, ammonia excretion) from laboratory experiments on the effects of temperature and ocean acidification stressors on Desmophyllum dianthus (Data from Gori et al 2016). British Oceanographic Data Centre - Natural Environment Research Council, UK. doi:10/cg95.