Mon compte
Université Toulouse-Jean Jaurès (Toulouse II-le Mirail)

Evolution of Land use at lake St Point (Jura Mountains) since the neolithic Period / Emilie Gauthier

Copier le code pour partager la vidéo :
<div style="position:relative;padding-bottom:56.25%;padding-top:10px;height:0;overflow:hidden;"><iframe src=";height=100%" style="position:absolute;top:0;left:0;width:100%;height: 100%;" width="550" height="306" frameborder="0" allowfullscreen scrolling="no"></iframe></div> Si vous souhaitez partager une séquence, indiquez le début de celle-ci , et copiez le code : h m s
Contacter la chaine
partager facebook twitter

Evolution of Land use at lake St Point (Jura Mountains) since the neolithic Period / Emilie Gauthier

Evolution of Land use at lake St Point (Jura Mountains) since the neolithic Period : palynological and sedimentological analyses. Emilie GAUTHIER. In "La construction des territoires montagnards : exploitation des ressources et mobilité des pratiques, 2ème International Workshop on archaeology of european mountain landscape, organisé par les Laboratoires GEODE et TRACES (Toulouse) et le Centre d'Archéologie Préhistorique du Rhône aux Alpes (Valence, France). Université Toulouse II-Le Mirail, 8-11 octobre 2009. [Première journée.]

Lake St Point (850 m ASL.) is located in the central part of Jura Mountains. The vegetation surrounding the lake is represented by wood pastures. Pasture woodland is a very ancient form of land use, characterized by a mosaic landscape, from the open pasture to the closed forest. In the context of human impact on vegetation, the aim of this study is to investigate chronology and details of the transition between the original ecosystems to the sylvopastoral ecosystem.
The deepest part of Lake St Point was cored from a floating platform. Chronology of the sequence is based on 24 AMS radiocarbon dates spread over the upper 7 m of the core. Concerning the recent period, 137Cs measurements were processed on the 20 upper centimeters of the sequence. The first results confirm the high quality of the deep lacustrine records and their scientific interest. The sediment succession collected in Lake St Point reveals a stratigraphically continuous profile spanning the entire Holocene period, and showing particular sensitivity to Human impact on vegetation. Pollen analysis reveals the first human impact as soon as the early Neolithic period, around 5300 cal. BC. Then, first farmers disappear until 4000 cal. BC. From this period to the end of Bronze Age, a particular land use takes place. Distinct pulses of forest clearance as a result of human activity can be observed. Among anthropogenic indicators, peaks of Cerealia type are followed by the increase of open landscape herbs.
In a third phase, shrubs and light demanding trees (Juniperus, Acer…) develop in the clearance. Sedimentological analyses show that silicates and detrital carbonate fractions progressively increased, due to the erosion of soil. From the end of Bronze Age to the end of Iron Age, both Cerealia type and plants of open landscape curves increase and decrease together. This different signal suggests a new type of land use, with permanent fields. The Hallstatt period is characterized by regular human impacts while La Tène period correspond to a decline of agriculture. However, human pressure remains perceptible with regular clearance in the Fagus and Abies forest. Silicates content still increased while detrital carbonates input became steady due to a change in pedogenetic processes affecting thecatchment. he two last millennia have recorded the most important human impact: large"scale deforestation, especially during the Middle Ages, altered the vegetation cover drastically. Grassland became used more intensively and during the modern period, silicates and detrital carbonate decreased, probably due to wood pastures development.



Ajouter un commentaire Lire les commentaires
*Les champs suivis d’un astérisque sont obligatoires.
Aucun commentaire sur cette vidéo pour le moment (les commentaires font l’objet d’une modération)

Dans la même collection

 La construction des territoires montagnards : exploitation des ressources et mobilité des pratiques. Présentation du Workshop / Didier Galop
 L'agro-pastoralisme en milieu montagnard : l'apport des sépultures saisonnières / Patrice Courtaud
 Human environmental interactions in high altitude zone between Neolithic and roman period / K. Walsh
 Prehistory of the Southern Appalachian uplands of Tennessee / Jay Franklin
 L'évolution végétale holocène sur le versant sud des Pyrénées occidentales / Maria-José Iriarte
 A cultural landscape research in a mediterranean mountain (Barcelona-Girona) / A. Garcia Molsosa
 The Hidram4000 project : land use, human occupation and lanscape changes in Spain / A. Curras
 Exploitation of natural vegetal resources in chalcolithic areni-1 cave (Armenia) / R. Hovsepyan
 Mountain anthropization in Alps : a multidisciplinary look in the Pygmalion program / F. Arnaud
 Territorial practices, landscape dynamics and mobilities in a french mountain / P. Allée, Y. MIras
 Wildfires in european alps : frequent yesterday, rare today, frequent tomorrow ? / W. Finsinger
 Exploitation des vallées andorranes depuis le Néolithique/ J.-M. Palet Martinez, H. Orengo Romeu
 New data about the human occupation, environmental history, landscape changes in Pyrenees / Emengol Gassiot
 Populating and circulations in the valleys of the western alps of prehistory to antiquity/ PJ. Rey
 Exemple de l'occupation de l'espace dans la montagne corse au bas Moyen Age: peuplement et économie dans la Pieve de Rostino / Émilie Tomas
 Spatial modeling approach of summer pasture grazing walks / Mélanie Le Couédic
 Plant economy of a seasonally occupied site at high altitude during the Neolithic / Lucie Martin
 Exploitations du cuivre au Bronze ancien dans les Alpes / Joël Vital, Éric Thirault
 Iron mining and smelting from the late to early medieval Periods in the Mercantour / P. Rosenthal
 Premiers indices d'exploitation de cuivre et de fer dans les Pyrénées occidentales / Argitxu Beyrie
 Exploitation of copper ressources in Alps in the late Neolithic and Bronze Age / Laurent Carozza
 A survey of the use of an upper mountain-alpine area in Central Italian Alps / Dagfinn Moe
 Mountain farming of Norway : Land use History and Development of cultural Landscapes / Mons Kvamme
 Environmental archaeology of post-medieval terraced chestnut groves sites / C. Molinari, AM. Stagno
 Rythmes et mobilité d'occupation dans le massif du Morvan / Isabelle Jouffroy-Bapicot, Pierre Nouvel
 Constructions et fonctionnalités des territoires de montagne en pays de Soule / Pascal Palu
 Elevation-induced variations of pollen assemblages in North-Western Alps / Elena Ortu
 Reconstructing past agro-pastoral systems from environmental archaeology in Liguria / B.I. Menozzi
 Quantitative organic petrography and reconstruction of paleoenvironments in Alps / A. Simonneau
Facebook Twitter
Mon Compte