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The Great American Biotic Interchange revisited: a new perspective from the stable isotope record of Argentine Pampas fossil mammals

dc.contributor.authorDomingo Martínez, Laura
dc.contributor.authorTomassini, Rodrigo L.
dc.contributor.authorMontalvo, Claudia I.
dc.contributor.authorSanz Pérez, Danae
dc.contributor.authorAlberdi, María Teresa
dc.date.accessioned2023-06-16T15:15:56Z
dc.date.available2023-06-16T15:15:56Z
dc.date.issued2020
dc.description.abstractThis study aims at assessing resource and habitat use, niche occupation and trophic interactions from a stable isotope perspective on fossil mammals from the Argentine Pampas during the Great American Biotic Interchange (GABI). We present stable isotope data of more than 400 samples belonging to 10 mammalian orders and spanning a temporal range from ~9.5 Ma to ~12 ky. Rodents, notoungulates and pilosians record an increase in the consumption of C4 plants, whereas litopterns and cingulates show δ13C values that remain mostly within a C3-dominated diet. Our stable isotope data indicates that the expansion of C4 vegetation opened up new niche opportunities, probably alleviating resource competition among endemic taxa. Gomphothere, equid and camelid δ13C records show a broad variability pointing to consumption of C3 and mixed C3-C4 vegetation. This flexible dietary behavior may have facilitated the successful settlement of immigrant groups in South America. In the case of carnivorous taxa, Late Miocene pre-GABI endemic sparassodonts consumed prey from C3 environments, whereas immigrant carnivorans preferred prey from mixed C3-C4 areas. Our research contributes to the study of the GABI from a different perspective as stable isotope records permit to characterize, from a (semi)quantitative standpoint, ecological traits within extinct fauna.
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipNational Geographic-Waitt Foundation
dc.description.sponsorshipUniversidad Complutense de Madrid/Banco de Santander
dc.description.sponsorshipCSIC-i-COOP
dc.description.sponsorshipUniversidad Nacional de La Pampa
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/59109
dc.identifier.doi10.1038/s41598-020-58575-6
dc.identifier.issn2045-2322
dc.identifier.officialurlhttps://www.nature.com/articles/s41598-020-58575-6
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6050
dc.issue.number1608
dc.journal.titleScientific Reports
dc.language.isoeng
dc.publisherNature Research
dc.relation.projectID(CGL2013-43257-R; CGL2015-68333-P; CGL2016-79334-P; PGC2018-094955-A-I00)
dc.relation.projectID#W467-16
dc.relation.projectIDUCM (910607)
dc.relation.projectIDCOOPB-20287
dc.relation.projectIDProyecto G6
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.cdu56:574(823.l)
dc.subject.cdu569(823.l)
dc.subject.ucmPaleontología
dc.subject.unesco2416 Paleontología
dc.titleThe Great American Biotic Interchange revisited: a new perspective from the stable isotope record of Argentine Pampas fossil mammals
dc.typejournal article
dc.volume.number10
dspace.entity.typePublication
relation.isAuthorOfPublication1c4f2451-bfbf-47b0-8493-e6d180dcba84
relation.isAuthorOfPublication7516423a-9940-471e-b25f-8da84bdc7b74
relation.isAuthorOfPublication.latestForDiscovery1c4f2451-bfbf-47b0-8493-e6d180dcba84

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