L'anthropisation des milieux du Néolithique à l'âge du Fer dans le bassin de la Seine enregistrée par les malacofaunes continentales

Abstract : Continental molluscs are very sensitive indicators of local environmental conditions. Molluscs are representative of local environments, but previous studies have demonstrated the consistency of the Lateglacial and Early Holocene malacological successions throughout North-Western Europe. This result has been obtained thanks to a high number of analyses that enabled to distinguish general characteristics from local variations. The present study focuses on the malacological data from the second half of the Holocene in the floodplains of the Seine basin. By presenting a synthesis of the data collected over fifteen sites, this work aims to provide a malacological framework of the major environmental steps recorded in the floodplains of the Seine basin and to assess the role of human societies in some of the observed transformations. It is demonstrated that a common environmental trajectory is shared on all the studied sites. During the first half of the Holocene, floodplains are dominated by woodlands and the anthropogenic impact seems limited to the immediate vicinity of archaeological sites. The landscape becomes more open and moister during the Subboreal, in particular during the Bronze Age. At the transition between the Subboreal and the Subatlantic, at the beginning of the Iron Age, alluvial plains are already widely cleared of trees and their landscape appears to be largely homogenised. These malacological results are then discussed in relation to human settlements and compared with other indicators at the regional level (palynology, geomorphology). They are also compared with other malacological framework, built in north-western and central Europe, in order to assess whether the changes recorded are observed on a large scale and to understand their causalities.
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Salomé Granai. L'anthropisation des milieux du Néolithique à l'âge du Fer dans le bassin de la Seine enregistrée par les malacofaunes continentales. Archéologie et Préhistoire. Université Panthéon-Sorbonne - Paris I, 2014. Français. ⟨NNT : 2014PA010618⟩. ⟨tel-02158090⟩

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