Publications des scientifiques de l'IRD

Garilli V., Rodolfo-Metalpa Riccardo, Scuderi D., Brusca L., Parrinello D., Rastrick S.P.S., Foggo A., Twitchett R.J., Hall-Spencer J.M., Milazzo M. (2015). Physiological advantages of dwarfing in surviving extinctions in high-CO2 oceans. Nature Climate Change, 5, p. 678-682 [+ supplementary information : 18 p.]. ISSN 1758-678X.

Titre du document
Physiological advantages of dwarfing in surviving extinctions in high-CO2 oceans
Année de publication
2015
Type de document
Article
Auteurs
Garilli V., Rodolfo-Metalpa Riccardo, Scuderi D., Brusca L., Parrinello D., Rastrick S.P.S., Foggo A., Twitchett R.J., Hall-Spencer J.M., Milazzo M.
Source
Nature Climate Change, 2015, 5, p. 678-682 [+ supplementary information : 18 p.] ISSN 1758-678X
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.
Plan de classement
Climatologie / Météorologie [032CLIMET] ; Milieu marin [036MILMAR]
Descripteurs
MILIEU MARIN ; CLIMAT ; GAZ CARBONIQUE ; ACIDIFICATION ; INVERTEBRE AQUATIQUE ; COQUILLAGE ; ADAPTATION ; CALCAIRE ; METABOLISME ; BIOMETRIE ; NANISME ; CHANGEMENT CLIMATIQUE
Description Géographique
MEDITERRANEE
Localisation
Fonds IRD [F B010064570]
Identifiant IRD
fdi:010064570
Contact