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Physiological responses to ocean acidification and warming synergistically reduce condition of the common cockle Cerastoderma edule
Ong, E.Z.; Briffa, M.; Moens, T.; Van Colen, C. (2017). Physiological responses to ocean acidification and warming synergistically reduce condition of the common cockle Cerastoderma edule. Mar. Environ. Res. 130: 38-47. https://dx.doi.org/10.1016/j.marenvres.2017.07.001
In: Marine Environmental Research. Applied Science Publishers: Barking. ISSN 0141-1136; e-ISSN 1879-0291
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Open Marine Archive 307633 [ download pdf ]
Keywords
    Biology > Physiology > Ecophysiology
    Cerastoderma edule (Linnaeus, 1758) [WoRMS]
Author keywords
    Future ocean; Ocean acidification; Ocean warming;
Authors  Top 
  • Ong, E.Z.
  • Briffa, M.
  • Moens, T.
  • Van Colen, C.
Abstract
    The combined effect of ocean acidification and warming on the common cockle Cerastoderma edule was investigated in a fully crossed laboratory experiment. Survival of the examined adult organisms remained high and was not affected by elevated temperature (+3 °C) or lowered pH (−0.3 units). However, the morphometric condition index of the cockles incubated under high pCO2 conditions (i.e. combined warming and acidification) was significantly reduced after six weeks of incubation. Respiration rates increased significantly under low pH, with highest rates measured under combined warm and low pH conditions. Calcification decreased significantly under low pH while clearance rates increased significantly under warm conditions and were generally lower in low pH treatments. The observed physiological responses suggest that the reduced food intake under hypercapnia is insufficient to support the higher energy requirements to compensate for the higher costs for basal maintenance and growth in future high pCO2.
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