Garilli V. auteur aut IRD Rodolfo-Metalpa Riccardo auteur aut IRD Scuderi D. auteur aut IRD Brusca L. auteur aut IRD Parrinello D. auteur aut IRD Rastrick S.P.S. auteur aut IRD Foggo A. auteur aut IRD Twitchett R.J. auteur aut IRD Hall-Spencer J.M. auteur aut IRD Milazzo M. auteur aut IRD text journalArticle eng text/pdf born digital access Excessive CO2 in the present-day ocean-atmosphere system is causing ocean acidification, and is likely to cause a severe biodiversity decline in the future, mirroring effects in many past mass extinctions. Fossil records demonstrate that organisms surviving such events were often smaller than those before, a phenomenon called the Lilliput effect. Here, we show that two gastropod species adapted to acidified seawater at shallow-water CO2 seeps were smaller than those found in normal pH conditions and had higher mass-specific energy consumption but significantly lower whole-animal metabolic energy demand. These physiological changes allowed the animals to maintain calcification and to partially repair shell dissolution. These observations of the long-term chronic effects of increased CO2 levels forewarn of changes we can expect in marine ecosystems as CO2 emissions continue to rise unchecked, and support the hypothesis that ocean acidification contributed to past extinction events. The ability to adapt through dwarfing can confer physiological advantages as the rate of CO2 emissions continues to increase. specialized MILIEU MARIN CLIMAT GAZ CARBONIQUE ACIDIFICATION INVERTEBRE AQUATIQUE COQUILLAGE ADAPTATION CALCAIRE METABOLISME BIOMETRIE NANISME CHANGEMENT CLIMATIQUE MEDITERRANEE 036MILMAR 032CLIMET 5 678-682 [+ supplementary information : 18 p.] 2015 1758-678X https://www.documentation.ird.fr/hor/fdi:010064570 10.1038/nclimate2616 1758-678X [F B010064570] https://www.documentation.ird.fr/hor/fdi:010064570 https://www.documentation.ird.fr/intranet/publi/depot/2015-06-30/010064570.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-06-30 2015-11-09 fdi:010064570 fre