SANCHEZ GONI, Maria Fernanda

doi:10.1017/ehs.2020.56

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SANCHEZ GONI, Maria Fernanda
Environnements et Paléoenvironnements OCéaniques [EPOC]

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Article de revue

Ce document a été publié dans

Evolutionary Human Sciences. 2020-10-28, vol. 2

Résumé en anglais

The traditional concept of long and gradual, glacial–interglacial climate changes during the Quaternary has been challenged since the 1980s. High temporal resolution analysis of marine, terrestrial and ice geological archives has identified rapid, millennial- to centennial-scale, and large-amplitude climatic cycles throughout the last few million years. These changes were global but have had contrasting regional impacts on the terrestrial and marine ecosystems, with in some cases strong changes in the high latitudes of both hemispheres but muted changes elsewhere. Such a regionalization has produced environmental barriers and corridors that have probably triggered niche contractions/expansions of hominin populations living in Eurasia and Africa. This article reviews the long- and short-timescale ecosystem changes that have punctuated the last few million years, paying particular attention to the environments of the last 650,000 years, which have witnessed key events in the evolution of our lineage in Africa and Eurasia. This review highlights, for the first time, a contemporaneity between the split between Denisovan and Neanderthals, at ~650–400 ka, and the strong Eurasian ice-sheet expansion down to the Black Sea. This ice expansion could form an ice barrier between Europe and Asia that may have triggered the genetic drift between these two populations.< Réduire

Mots clés en anglais

Middle and Upper Pleistocene

Dansgaard–Oeschger cycles

Heinrich events

Neanderthal–Denisovan

Homo sapiens

URI

https://oskar-bordeaux.fr/handle/20.500.12278/189133

DOI

http://dx.doi.org/10.1017/ehs.2020.56

Project ANR

450-350 ka : un seuil dans l'évolution humaine ? Comprendre les racines du monde néandertalien - ANR-19-CE27-0011

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805