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Author Ramajo, L.; Rodriguez-Navarro, A.B.; Duarte, C.M.; Lardies, M.A.; Lagos, N.A.
Title Shifts in shell mineralogy and metabolism of Concholepas concholepas juveniles along the Chilean coast Type
Year 2015 Publication Marine And Freshwater Research Abbreviated Journal Mar. Freshw. Res.
Volume 66 Issue 12 Pages 1147-1157
Keywords calcium carbonate; metabolism; ocean acidification; temperature
Abstract Along the west coast of South America, from the tropical zone to the Patagonian waters, there is a significant latitudinal gradient in seawater temperature, salinity and carbonate chemistry. These physical-chemical changes in seawater induce morphological and physiological responses in calcifying organisms, which may alter their energy budget and calcification processes. In this study, we study the organism energy maintenance (i.e. metabolic rate) and mineralogical composition of the shell of the juvenile marine snails Concholepas concholepas (Gastropoda: Muricidae), collected from benthic populations located similar to 2000km apart, varies across geographic regions along the Chilean coast. We found that in juvenile snails, the calcite:aragonite ratio in the pallial shell margin (i.e. newly deposited shell) increase significantly from northern to southern populations and this increase in calcite precipitation in the shell of juveniles snails was associated with a decrease in oxygen consumption rates in these populations. Our result suggests that calcite secretion may be favoured when metabolic rates are lowered, as this carbonate mineral phase might be less energetically costly for the organism to precipitate. This result is discussed in relation to the natural process such as coastal upwelling and freshwater inputs that promote geographic variation in levels of pH and carbonate saturation state in seawater along the Chilean coast.
Address [Ramajo, Laura; Duarte, Carlos M.] CSIC UIB, Inst Mediterraneo Estudios Avanzados IMEDEA, Global Change Dept, E-07190 Esporles, Islas Baleares, Spain, Email: lramajo@imedea.uib-csic.es
Corporate Author Thesis
Publisher Csiro Publishing Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume (down) Series Issue Edition
ISSN 1323-1650 ISBN Medium
Area Expedition Conference
Notes WOS:000366105500008 Approved
Call Number UAI @ eduardo.moreno @ Serial 561
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