Climatic and environmental changes during the middle to late Holocene in southern South America: A sclerochronological approach using the bivalve Retrotapes exalbidus (Dillwyn) from the Beagle channel

dc.creatorGordillo, Sandra
dc.creatorBrey, Thomas
dc.creatorBeyer, Kerstin
dc.creatorLomovasky, Betina Judith
dc.date2015-01
dc.identifierhttp://hdl.handle.net/11336/37426
dc.identifierGordillo, Sandra; Brey, Thomas; Beyer, Kerstin; Lomovasky, Betina Judith; Climatic and environmental changes during the middle to late Holocene in southern South America: A sclerochronological approach using the bivalve Retrotapes exalbidus (Dillwyn) from the Beagle channel; Pergamon-Elsevier Science Ltd; Quaternary International; 377; 1-2015; 83-90
dc.identifier1040-6182
dc.identifierCONICET Digital
dc.identifierCONICET
dc.descriptionLittle is known about the effects of Holocene climate variability on marine environments and their biota in southern South America. Fossil shells of the aragonitic bivalve Retrotapes exalbidus (Dillwyn) offer the possibility of investigating climate variability and particularly the seasonal dynamics of sea-water temperature in the Beagle Channel during different parts of the middle to late-Holocene. We compared three specimens of different geological age (determined by 14C), i.e. 5190 BP, 3839 BP, and 431 BP. These shells, respectively, refer to a cooling period at ca. 5000 BP, a climate optimum at ca. 4000 BP, and a further cooling at ca. 500 BP. All three shells showed clear annual growth bands, with a distinct intra-annual δ18O cycle. δ18O ranges clearly indicate higher summer temperatures in the 3839 BP shell (1.53‰--1.16‰) compared with the 5190 BP shell (1.29‰-0.72‰) and the 431 BP shell (1.55‰-0.44‰), which correspond to maximum SSTs of 17.73 °C, 9.61 °C and 10.81 °C, respectively. Apparently, R. exalbidus shells are suitable bioarchives that allow comparing seasonal patterns through the Holocene, thus constituting another proxy for evaluating paleoclimatic and paleoenvironmental changes in this region.
dc.descriptionFil: Gordillo, Sandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
dc.descriptionFil: Brey, Thomas. Alfred Wegener Institute for Polar and Marine Research; Alemania
dc.descriptionFil: Beyer, Kerstin. Alfred Wegener Institute for Polar and Marine Research; Alemania
dc.descriptionFil: Lomovasky, Betina Judith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
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dc.formatapplication/pdf
dc.languageeng
dc.publisherPergamon-Elsevier Science Ltd
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2014.12.036
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1040618214009914
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subjectBivalvia
dc.subjectHolocene
dc.subjectSclerochronology
dc.subjectSouthern South America
dc.subjectStable Isotopes
dc.subjecthttps://purl.org/becyt/ford/1.5
dc.subjecthttps://purl.org/becyt/ford/1
dc.titleClimatic and environmental changes during the middle to late Holocene in southern South America: A sclerochronological approach using the bivalve Retrotapes exalbidus (Dillwyn) from the Beagle channel
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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