Journal article

Shell sclerochronology and stable isotopes of the bivalve Anomalocardia flexuosa (Linnaeus, 1767) from southern Brazil: Implications for environmental and archaeological studies

Andre Carlo Colonese, Sergio Antonio Netto, Andre Silva Francisco, Paulo DeBlasis, Ximena S Villagran, Raquel de Almeida Rocha Ponzoni, Y Hancock, Niklas Hausmann, Deisi Sunderlick Eloy de Farias, Amy Prendergast, Bernd R Schoene, Francisco William da Cruz, Paulo Cesar Fonseca Giannini



This study presents the first stable isotopic and sclerochronological calibration of the bivalve Anomalocardia flexuosa (Linnaeus, 1767) in relation to environmental variables in a subtropical coastal area of southern Brazil. We investigate incremental shell growth patterns and δ18O and δ13C values of modern specimens collected alive from the Laguna Lagoonal System (LLS). Shells of Anomalocardia flexuosa are also one of the main biological components of pre-Columbian archaeological shell mounds and middens distributed along the Brazilian coastline. We therefore selected archaeological specimens from a local late Holocene shell mound (Cabeçuda) to compare their stable carbon and oxygen isotop..

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Awarded by Sao Paulo Research Foundation (FAPESP) (Brazil)

Awarded by Evolucao da Floresta Atlantica (Brazil)

Awarded by Spanish National Research Council (Spain)

Awarded by Arts and Humanities Research Council

Funding Acknowledgements

The authors are grateful to Chandelle Macdonald (University of Wyoming), Maria Helena Bezerra Maia de Hollanda and Alyne Barros (Laboratorio de Isotopos Estaveis of the Universidade de Sao Paulo), Milene Fornari (Universidade Estadual Paulista, Campus Sao Vicente), Angel Alvarez Larena and Javier Martinez (Servei de Difraccio de Raigs X, Universitat Autonoma de Barcelona, Spain), Vera Lucia da Silva Ranghetti (Epagri/Ciram), Krista McGrath (University of York) and Mark Skinner (Simon Fraser University). All necessary permits were obtained for the described study, which complied with all relevant regulations of the Institute do Patrimonio Historico e Artistic Nacional-IPHAN (protocol no 01510.01513/2012-92, 01510.000956/2013-47) and ICMBio (IMABA, SISBIO) for sampling, exporting and analysing modern shells of Anomalocardia flexuosa from the LLS (protocol no 113508). The modern and archaeological shells used in this study are stored at the Department of Archaeology of the University of York (UK). Fig. 1 was produced with data available from the U.S. Geological Survey and NASA Land Processes Distributed Active Archive Center (LP DAAC) Products. This research was funded by the Sao Paulo Research Foundation (FAPESP) project "Sambaquis e Paisagem" (Ref. 04/11038-0; Brazil), "Evolucao da Floresta Atlantica" (Ref. 05/51034-6; Brazil), mobility grant (Ref. PA1002165) from the Spanish National Research Council (Spain). R.A.R.P. is grateful to the Brazilian funding council CNPq for the PhD scholarship provided. The authors are grateful to the comments of the two anonymous reviewers and the editor, which improved the quality of the manuscript.