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Last name: GUITER
First name: Frédéric
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Vulnérabilité et résilience des géosystèmes de montagne face au double forçage climatique et anthropique: étude pluridisciplinaire du Lac Petit (Alpes Maritimes)
La séquence sédimentaire du lac Petit (Vallon des Millefonts, massif du Mercantour, France) a fourni un enregistrement sédimentaire et pollinique en continu sur les 5 derniers millénaires. Ce lac de surcreusement glaciaire (2200 m d'altitude) agit comme un piège naturel à sédiment et nous a permis d'étudier les différentes composantes...
This study investigates sediment cores from the Mediterranean alpine lakes located in upvalley cirques upper than 1700 metres a.s.l. using sedimentological, palynological and geomorphological studies, in order to document environmental changes following the last phase of glacier retreat. These results are considered in the framework of the...
This study presents new 14C AMS ages obtained from the sedimentary sequence of Lake Allos (elevation: 2,230 m, Verdon valley, Southern Alps, France). These ages provide new evidence on the last deglaciation over the Southern Alps, enabling us to revise the chronological framework previously established. Sedimentation in the lake began between...
Numerous archaeological studies carried out in high-elevation areas of the Southern French Alps have documented ancient human occupation of mountains, mainly characterized by pastoral and mining activities. Besides, the area was affected by both continental and Mediterranean climate instability throughout the Holocene. Lake Petit, located in...
Ancient human presence in the mountain landscapes of the Alps has been documented by archaeological and palaeoecological studies which show a change from gathering to pastoralism over the last 4 ka. Above 2000 m, landscapes have been exploited at least since the Bronze Age. Human activities rendered soils vulnerable to colluviation, increasing...
A 144-cm-long core was obtained in Lake Petit (2200 m a.s.l., Mediterranean French Alps) in order to reconstruct past interactions between humans, the environment and the climate over the last five millennia using a multidisciplinary approach involving sedimentological, geochemical and botanical analyses. We show a complex pattern of...
Ancient human presence in the mountain landscapes of the Alps has been documented by archaeological and palaeoecological studies which show a change from gathering to pastoralism over the last 4 ka. Above 2000 m, landscapes have been exploited at least since the Bronze Age. Human activities rendered soils vulnerable to colluviation, increasing...
L'analyse multiproxies à haute résolution d'une séquence sédimentaire prélevée dans le Lac Petit (alt. 2 200 m, vallon des Millefonts, Mercantour, France) a permis d'étudier les interactions climat-environnement-Homme à l'Holocène récent en contexte de haute montagne dans les Alpes du Sud. Grâce aux analyses lithostratigraphiques, géochimiques...
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Archaeological studies carried out in the European Alps have documented ancient human occupation of mountains, characterized by hunting, pastoral activities and mining. High resolution multi-proxy analyses, including sedimentological, palynological and geochemical investigations, were carried out on a 144 cm-long sediment core from the Lac...
Mediterranean mountains are very sensitive geosystems to erosion processes. These environments combine three steep gradients: topographic, ecologic and climatic. They are extremely vulnerable to both anthropogenic and climate-driven global changes. We propose a multiproxy approach from sediments sequence of Petit Lake (2200m, Millefonts...