Impact of elevated pCO2 on acid-base regulation of the sea urchin Echinometra mathaei and its relation to resistance to ocean acidification: a study in mesocosms
[en] Due to their low metabolism and apparent poor ion regulation ability, sea urchins could be particularly sensitive to ocean acidification resulting from increased dissolution of atmospheric carbon dioxide. Therefore, we evaluated the acid-base regulation ability of the coral reef sea urchin Echinometra mathaei and the impact of decreased pH on its growth and respiration activity. The study was conducted in two identical artificial reef mesocosms during seven weeks. Experimental tanks were maintained respectively at mean pHT 7.7 and 8.05 (with field-like night and day variations). The major physico-chemical parameters were identical, only pCO2 and pHT differed. Results indicate that E. mathaei can regulate the pH of its coelomic fluid in the considered range of pH, allowing a sustainable growth and ensuring an unaffected respiratory metabolism, at least at short term.
Moulin, Laure ; Université de Mons > Faculté des Sciences > Ecologie numérique
Grosjean, Philippe ; Université de Mons > Faculté des Sciences > Service d'Ecologie numérique
Leblud, Julien ; Université de Mons > Faculté des Sciences > Ecologie numérique
Batigny, Antoine ; Université de Mons > Faculté des Sciences > Ecologie numérique
Dubois, Philippe
Language :
English
Title :
Impact of elevated pCO2 on acid-base regulation of the sea urchin Echinometra mathaei and its relation to resistance to ocean acidification: a study in mesocosms
Publication date :
01 August 2014
Journal title :
Journal of Experimental Marine Biology and Ecology
ISSN :
0022-0981
Publisher :
Elsevier, Netherlands
Volume :
457
Pages :
97-104
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S807 - Ecologie numérique
Research institute :
R150 - Institut de Recherche sur les Systèmes Complexes R100 - Institut des Biosciences
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