Seawater carbonate chemistry and echinoderm Asterias rubens biological processes during experiments, 2011

• Main Authors: Hernroth, Bodil, Baden, Susanne, Thorndyke, Mike, Dupont, Sam
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Alkalinity; total; Animalia; Aragonite saturation state; Asterias rubens; 70 kilodalton heat shock protein per protein mass; coelomocyte; mitogen activated protein kinase p38 per protein mass; pH; coelomic fluid; phagocytosis; Benthic animals; Benthos; Bicarbonate ion; Calcite saturation state; Calculated; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Containers and aquaria (20-1000 L or < 1 m**2); Echinodermata; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Experimental treatment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Identification; Immunology/Self-protection; Laboratory experiment; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH meter (Metrohm electrodes); Salinity; see reference(s); Single species; Temperature; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.767584; https://doi.org/10.1594/PANGAEA.767584

We compared effects of exposure to predicted near-future (2100) ocean acidification (OA; pH 7.7) and normal seawater (Control; pH 8.1) on immune and stress responses in the adult sea star Asterias rubens. Analyses were made after one week and after six months of continuous exposure. Following one week exposure to acidified water, the pH of coelomic fluid was significantly reduced. Levels of the chaperon Hsp70 were elevated while key cellular players in immunity, coelomocytes, were reduced by approximately 50%. Following long-term exposure (six months) levels of Hsp70 returned to control values, whereas immunity was further impaired, evidenced by the reduced phagocytic capacity of coelomocytes and inhibited activation of p38 MAP-kinase. Such impacts of reduced seawater pH may have serious consequences for resistance to pathogens in a future acidified ocean.