Alpine areas 1 Bronze 1 Bronze Age 1 Bronze age 1 Central pyrenees Elevational gradient 1 Elevational gradients 1 Landscape anthropization 1 Middle Ages 1 Middle ages 1 Pollen analysis 1 Preliminary analysis 1 Pyrenees 1 Roman era 1 Spatio-temporal gradients 1 alpine environment 1 chronology 1 landscape ecology 1 mountain region 1 paleoecology 1 pastoralism 1 spatiotemporal analysis 1 subalpine environment 1