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Effects of CO2-induced ocean acidification on physiological and mechanical properties of the starfish Asterias rubens
Collard, M.; Catarino, A.I.; Bonnet, S.; Flammang, P.; Dubois, P. (2013). Effects of CO2-induced ocean acidification on physiological and mechanical properties of the starfish Asterias rubens. J. Exp. Mar. Biol. Ecol. 446: 355-362. dx.doi.org/10.1016/j.jembe.2013.06.003
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981; e-ISSN 1879-1697
Peer reviewed article  
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Trefwoorden
    Asterias rubens Linnaeus, 1758 [WoRMS]; Echinodermata [WoRMS]
    Marien/Kust
Author keywords
    Acid-base balance; Asterias rubens; Echinoderms; Metabolism; Oceanacidification; Tube foot mechanical properties
Auteurs  Top 
  • Collard, M.
  • Catarino, A.I.
  • Bonnet, S.
  • Flammang, P.
  • Dubois, P.
Abstract
    The increase in atmospheric CO2 due to anthropogenic activity results in an acidification of the surface waters of the oceans. Its impact will depend on the considered organisms and ecosystems. The intertidal may harbor organisms pre-adapted to the upcoming changes as they face tidal pH and temperature fluctuations. However, these environments will be more affected as shallow waters will face the highest decrease in seawater pH. In this context, the effects of reduced environmental pH on the physiology and tube feet mechanical properties of the intertidal starfish Asterias rubens, a top predator, were investigated during 15 and 27 days. A. rubens showed a respiratory acidosis with its coelomic fluid pH always lower than that of seawater. This acidosis was most pronounced at pH 7.4. Notwithstanding, the starfish showed no significant variations in RNA/DNA ratio of different tissues and in tube feet strength. However, respiration rates were significantly lower for individuals maintained at reduced seawater pH. Within the ocean acidification context, the present results suggest that A. rubens withstands the effects of reduced seawater pH, at least for medium term exposures.
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STARDUST II is a project funded by the INTERREG III A programme (France/Walloon Region/Flanders French-Flemish subprogramme) of the European Community's Regional Development Fund.
Hosted by the Flanders Marine Institute (VLIZ)