Growth, respiration and mortality rates of live L. pertusa under gradually amplifying acidification and warming increments and consequences for dissolution and bioerosion of dead coral framework ...

• Main Authors: Büscher, Janina, Form, Armin, Wisshak, Max, Kiko, Rainer, Riebesell, Ulf
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2022
• Subjects: Bioerosion; Calcification/Dissolution; cold-water coral; Deep Atlantic; global warming; Metabolic rate; Ocean acidification; Biological Impacts of Ocean Acidification BIOACID; Lophelia pertusa
• Online Access: https://dx.doi.org/10.1594/pangaea.947285; https://doi.pangaea.de/10.1594/PANGAEA.947285

In a 13-months laboratory experiment conducted in 2014/2015, the interactive effects of gradually increasing temperature and pCO2 levels on survival, growth and respiration of two prominent colour morphotypes (white and orange) of the framework-forming cold-water coral Lophelia pertusa (also known as Desmophyllum pertusum), as well as bioerosion and dissolution of dead coral framework were assessed. In six-week intervals, three treatments (T1: acidification, T2: warming, T3: combined acidification and warming) were gradually increased in their respective manipulated parameters by 1°C and/or 200 µatm pCO2 after an initial two intervals under ambient (near in-situ) conditions. Each treatment consisted of 7 replicates that were manipulated over the course of the experiment and 3 control replicates that remained at ambient conditions throughout the entire duration of the experiment. Each replicate tank consisted of one live coral fragment of the white morphotype, one fragment of the orange morphotype and one ...