Effect of CO2–induced ocean acidification on the early development and shell mineralization of the European abalone (Haliotis tuberculata)
|Author(s)||Wessel Nathalie1, 2, Martin Sophie3, 8, Badou Aicha1, Dubois Philippe4, Huchette Sylvain5, Julia Vivien1, 6, Nunes Flavia6, 7, Harney Ewan6, Paillard Christine6, Auzoux-Bordenave Stephanie1, 8|
|Affiliation(s)||1 : MNHN CNRS IRD UPMC, Stn Biol Marine Concarneau, Museum Natl Hist Nat, UMR 7208,Biol Organismes & Ecosyst Aquat BOREA, F-29900 Concarneau, France.
2 : IFREMER, Dept Oceanog & Dynam Ecosyst ODE, Rue Iile Yeu,BP21105, F-44311 Nantes 3, France.
3 : Stn Biol Roscoff, AD2M, UMR 7144, F-29680 Roscoff, France.
4 : Univ Libre Bruxelles, Lab Biol Marine, CP160-15, B-1050 Brussels, Belgium.
5 : Ecloserie France Haliotis, F-29880 Kerazan, Plouguerneau, France.
6 : UEB, Univ Brest UBO, Lab Sci Environm Marin LEMAR, UMR 6539 CNRS UBO IRD Ifremer,Inst Univ Europeen, Pl Nicolas Copernic, F-29280 Plouzane, France.
7 : IFREMER, Ctr Bretagne, DYNECO, Lab Coastal Benth Ecol LEBCO, F-29280 Plouzane, France.
8 : Sorbonne Univ, 4 Pl Jussieu, F-75005 Paris, France.
|Source||Journal Of Experimental Marine Biology And Ecology (0022-0981) (Elsevier Science Bv), 2018-11 , Vol. 508 , P. 52-63|
|WOS© Times Cited||25|
|Keyword(s)||Ocean acidification, Abalone, Larval development, Shell mineralization|
Ocean acidification is a major global stressor that leads to substantial changes in seawater carbonate chemistry, with potentially significant consequences for calcifying organisms. Marine shelled mollusks are ecologically and economically important species providing essential ecosystem services and food sources for other species. Because they use calcium carbonate (CaCO3) to produce their shells, mollusks are among the most vulnerable invertebrates to ocean acidification, with early developmental stages being particularly sensitive to pH changes. This study investigated the effects of CO2-induced ocean acidification on larval development of the European abalone Haliotis tuberculata, a commercially important gastropod species. Abalone larvae were exposed to a range of reduced pHs (8.0, 7.7 and 7.6) over the course of their development cycle, from early-hatched trochophore to pre-metamorphic veliger. Biological responses were evaluated by measuring the survival rate, morphology and development, growth rate and shell calcification. Larval survival was significantly lower in acidified conditions than in control conditions. Similarly, larval size was consistently smaller under low pH conditions. Larval development was also affected, with evidence of a developmental delay and an increase in the proportion of malformed or unshelled larvae. In shelled larvae, the intensity of birefringence decreased under low pH conditions, suggesting a reduction in shell mineralization. Since these biological effects were observed for pH values expected by 2100, ocean acidification may have potentially negative consequences for larval recruitment and persistence of abalone populations in the near future.