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Abstract: Stable isotope ratios of mollusc shell carbonates have long been used to reconstruct past environmental conditions. Although shells also contain organics, they are seldom used in (paleo)climatic studies. Here, we extract the acid-soluble and insoluble fractions of the organic matrix of modern Mytilus galloprovincialis shells from three sites along a coast?to-upper-estuary environmental gradient to measure their hydrogen (?2H) and oxygen (?18O) isotope compositions. Both organic fractions showed isotopic signatures significantly different from those of carbonate and water at each site, indicating the involvement of different fractionation mechanisms. The soluble fraction showed gradual differences in isotope values along the gradient, while the insoluble fraction showed ?2H-?18O correlation regressions subparallel to the Global and Local Meteoric Water Lines. These results showed the great potential of the shell organic matrix stable isotopes as possible (paleo)environmental proxies, stimulating further research to better define the fractionation mechanisms involved.
Fuente: Communications Chemistry, 2024, 7, 16
Editorial: Springer Nature
Año de publicación: 2024
Nº de páginas: 12
Tipo de publicación: Artículo de Revista
DOI: 10.1038/s42004-023-01076-0
ISSN: 2399-3669
Proyecto español: HAR 2017-86262-P
Url de la publicación: https://doi.org/10.1038/s42004-023-01076-0
Consultar en UCrea Leer publicación
PALECEK, DRAGANA
MILANO, STEFANIA
FERNANDO IGOR GUTIERREZ ZUGASTI
TALAMO, SAHRA
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