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Detection of dietary stress and geophagic behaviour forced by dry seasons in Miocene Gomphotherium

2026-03-10Artigo científico Acesso aberto
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dc.contributor.authorCoimbra, Rute
dc.contributor.authorWinter, Niels de
dc.contributor.authorRíos, Maria
dc.contributor.authorBernardino, Rui
dc.contributor.authorEstraviz-López, Darío
dc.contributor.authorLohmann, Priscila
dc.contributor.authorMartino, Roberta
dc.contributor.authorGrandal-D'Anglade, Aurora
dc.contributor.authorRocha, Fernando
dc.contributor.authorClaeys, Philippe
dc.contributor.institutionDCT - Departamento de Ciências da Terra
dc.contributor.pblCopernicus Publications
dc.date.accessioned2026-05-15T16:16:01Z
dc.date.available2026-05-15T16:16:01Z
dc.date.issued2026-03-10
dc.descriptionPublisher Copyright: © 2026 Rute Coimbra et al.
dc.description.abstractTo access the impact of anthropogenic emissions and land use change on Earth's climate and biodiversity, studies into the environment and ecology of natural ecosystems during past warm periods are required. The Miocene Climatic Optimum is a key reference period for future global warming scenarios. However, studies uncovering Miocene climate have heavily favoured marine environments, leaving the impact of warming on terrestrial ecosystems understudied. Here, we present a multi-disciplinary study into the chemical composition of fossil Gomphotherium angustidens (Proboscidea, Mammalia) teeth from the Middle Miocene Vb division (∼ 15.9–16.1 Ma) of western Portugal (Chelas Valley, Lisbon, Lusitanian basin) and their sedimentological context. Trace element and stable isotope compositions in these fossil teeth are compared with similar measurements in molars of a taxonomically related modern African elephant (captive Loxodonta africana). Results reveal seasonal-scale variability in trace elements in both fossil and modern proboscidean tooth enamel, which are interpreted as evidence for seasonal changes in diet. Periodic increases in Na, Fe and Si in G. angustidens demonstrate intake of sediment in the diet during fixed times of the year, a behaviour type previously described in modern elephants during dry seasons. In combination with the heavier carbon and oxygen isotopic composition in G. angustidens compared to L. africana, the terrestrial climate in Miocene Portugal appears characterized by seasonally dry periods, which forced geophagy behaviour of these large mammals and likely had significant consequences for the composition of Miocene ecosystems (e.g., food/water availability and potential seasonal range shifts) in southwestern Europe.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent26
dc.format.extent14969793
dc.identifier.doi10.5194/bg-23-1833-2026
dc.identifier.issn1726-4170
dc.identifier.otherPURE: 162748691
dc.identifier.otherPURE UUID: 7a5aabfe-98d5-46e2-951b-c0456ba79288
dc.identifier.otherScopus: 105032901706
dc.identifier.otherWOS: 001709967200001
dc.identifier.urihttp://hdl.handle.net/10362/203153
dc.identifier.urlhttps://www.scopus.com/pages/publications/105032901706
dc.identifier.urlhttps://www.webofscience.com/wos/woscc/full-record/WOS:001709967200001
dc.language.isoeng
dc.peerreviewedyes
dc.subjectEcology, Evolution, Behavior and Systematics
dc.subjectEarth-Surface Processes
dc.subjectSDG 13 - Climate Action
dc.subjectSDG 14 - Life Below Water
dc.subjectSDG 15 - Life on Land
dc.titleDetection of dietary stress and geophagic behaviour forced by dry seasons in Miocene Gomphotheriumen
dc.typejournal article
degois.publication.firstPage1833
degois.publication.issue5
degois.publication.lastPage1858
degois.publication.titleBiogeosciences
degois.publication.volume23
dspace.entity.typePublication
rcaap.rightsopenAccess

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