Bioavailable Strontium, Human Paleogeography, and Migrations in the Southern Andes: A Machine Learning and GIS Approach

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datacite.alternateIdentifier.citationFrontiers in Ecology and Evolution, 9, 2021
datacite.alternateIdentifier.doi10.3389/fevo.2021.584325
datacite.alternateIdentifier.issn2296-701X
datacite.creatorBarberena, Ramiro
datacite.creatorCardillo, Marcelo
datacite.creatorLucero, Gustavo F.
datacite.creatorLe Roux, Petrus J.
datacite.creatorTessone, Augusto
datacite.creatorLlano, Carina Lourdes
datacite.creatorGasco, Alejandra Valeria
datacite.creatorMarsh, Erik J.
datacite.creatorNuevo Delaunay, Amalia
datacite.creatorNovellino, Paula Silvana
datacite.date2021
datacite.rightsAcceso abierto
datacite.subjectAndes
datacite.subjectArcheology
datacite.subjectBioavailable Strontium
datacite.subjectHuman Paleomobility
datacite.subjectMachine Learning
datacite.subjectMigrations
datacite.subjectRadiogenic Strontium Isotope
datacite.titleBioavailable Strontium, Human Paleogeography, and Migrations in the Southern Andes: A Machine Learning and GIS Approach
dc.contributor.authorLUCERO FERREYRA, GUSTAVO FERNANDO
dc.description.abstractThe Andes are a unique geological and biogeographic feature of South America. From the perspective of human geography, this mountain range provides ready access to highly diverse altitudinally arranged ecosystems. The combination of a geologically and ecologically diverse landscape provides an exceptional context to explore the potential of strontium isotopes to track the movements of people and the conveyance of material culture. Here we develop an isotopic landscape of bioavailable strontium (87Sr/86Sr) that is applied to reconstruct human paleogeography across time in the southern Andes of Argentina and Chile (31° 34°S). These results come from a macro-regional sampling of rodents (N = 65) and plants (N = 26) from modern and archeological contexts. This Southern Andean Strontium Transect extends over 350 km across the Andes, encompassing the main geological provinces between the Pacific coast (Chile) and the eastern lowlands (Argentina). We follow a recently developed approach to isoscape construction based on Random Forest regression and GIS analysis. Our results suggest that bioavailable strontium is tightly linked with bedrock geology and offers a highly resolved proxy to track human paleogeography involving the levels of territories or daily mobility and anomalous events that disrupt home ranges, such as migration. The southern Andes provide an ideal geological setting to develop this approach, since the geological variation in rock age and composition produces distinctive isotopic signatures for each main biogeographical region. Finally, we apply this framework to a set of results from human remains from the Uspallata Valley in Mendoza (Argentina), to assess the incidence of migration in the key period of the consolidation of agropastoral economies between AD 800 and 1400. The application of the isoscape to the values from human remains confirms the persistence of human groups with relatively restricted territories encompassing Uspallata and the adjacent Precordillera between AD 800 and 1500. We also identify a pulse of human migration between AD 1280 and 1420, shortly preceding the Inka conquest. Looking forward, we expect to converge with ongoing efforts in South America to build a continental research framework to track the movement of people, animals, and artifacts across space and time. © 2021 Elsevier B.V., All rights reserved.
dc.description.ia_keywordhuman, andes, strontium, geological, southern, track, bioavailable
dc.formatPDF
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/4364
dc.language.isoen
dc.publisherFrontiers Media
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceFrontiers in Ecology and Evolution
dc.subject.ia_odsODS 4: Educación de calidad
dc.subject.ia_oecd1nCiencias Naturales
dc.subject.ia_oecd2nCiencias Físicas
dc.subject.ia_oecd3nCiencias de la Tierra y Medioambientales
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2021
oaire.citationTitleFrontiers in Ecology and Evolution
oaire.citationVolume9
oaire.fundingReferenceANID FONDECYT 1170408 (Regular)
oaire.fundingReferenceANID Programa Regional 20F0002
oaire.fundingReferenceNational Geographic Society HJ-136R-17
oaire.fundingReferenceCONICET PIP 0301 (Argentina)
oaire.licenseConditionObra bajo licencia Creative Commons Atribución 4.0 Internacional
oaire.licenseCondition.urihttps://creativecommons.org/licenses/by/4.0/
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
relation.isAuthorOfPublication6680885f-15d2-4443-b8e8-df385c64820b
relation.isAuthorOfPublication.latestForDiscovery6680885f-15d2-4443-b8e8-df385c64820b
uct.catalogadorjvu
uct.comunidadCiencias Socialesen_US
uct.departamentoDepartamento de Antropología
uct.facultadFacultad de Ciencias Sociales y Humanidades
uct.indizacionScience Citation Index Expanded - SCIE
uct.indizacionScopus
uct.indizacionDOAJ
uct.indizacionSemantic Scholar
uct.indizacionOpenAIRE
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