 Today we represent a series of research carried out by the archaeology of high mountain areas from the University of Barcelona and the Spanish National Research Council. The series of research have been done with the collaboration of different research institutions like the University of Barcelona, this house and the support of the National Park of Iguastar de San San Mauricí Lake. Our case studies and our main focus of interest are the mountain areas of northwestern Mediterranean region. I'm in essence, today I present the case study of San Nicolau Valley. This is a Husepe glacial valley located just at the central Pyrenees area here in the northwest Catalonia, very close to the central South France. This is an area conformated basically by granular rocks from the Battle of Maladeta. This is an alpine mountain where the altitude used to be between 1500 and 3000 meters. There are the typical alpine Husepe glacial valleys. The historical sequence of occupation of this actual central Pyrenees region can be detected before the deglaciation finish at early adolescent time. When we can see different occupation of a hunter-gatherer communities as of the soles and the northern of the mountain range, but in any case, these hunter-gatherers societies can be located at gross shelter sites in the actual central Pyrenees area. But basically in the bottom valley areas, but in some cases they frequent the highlands too. In any case, this hunter-gatherer occupation they hunt around the mountains, but they don't have a stable occupation in the central area. This is at the early Neolithic times when the agro-livestock communities arrived. When we can see that these communities with their economy basic on serial production and the cattle of sheep and different animals, when they stayed occupying the central Pyrenees area during all the time. The main sites that we know of this area are located in the southern central area, but a site first situated in the southern site at the uplands and at the lowlands between 500 and 1,000 meters. But also at 1,500 meters we have an important site in bigger and bigger shelters in case of cobalotic cattle that are close to us. So in cases today I will speak about cobalotic cattle sites that are small, but the interesting thing is located at 1,800 meters of height in the central site of the mountain range. Well, you know that these Elinolithic communities of the North Western Mediterranean area arrived at this region about 7,500 years ago. And the occupation of the central area of the mountains is really early because we have more or less the same priorities in the sea area than in the mountains area. One interesting thing is that the idea that these communities that are in the mountains area not only have an economy budget on livestock activities, but also they have an important production of oxyria and we can document the production of pigs and goats in the highlands. Well, these Elinolithic communities are relatively resilient in the area during 2,000 years, all the Elinolithic time, but at the end of this period, in this interval between 3.3 and 2.5 kD before Christ, we detected an important social change in the management of these areas because we cannot set the presence of the frequent rock shelter sites in the higher sites at 2,000 meters or 2,400 meters. Well, the methodology for studying these areas include the archaeological excavation of sites, but also we are very interested in the core sites from lakes and pit books when we can observe the paleo landscape reconstruction using a multiproxy. But also we have done a series of test pieces in the off-site, in the surrounding area of the archaeological site in order to detect how these Elinolithic communities manage the landscape around the sediments. This is a new environmental approach and I want to integrate all paleo-economical data from both archaeological sites and environmental records. One of the mainly practices that manage the landscape is the use of fire. These Elinolithic communities can use the fire to open the thick forest that we can see at the bottom valley areas. They are really close forests and they are used to fire it to manage grasslands and firelands also. This ancient firing can be detected using the core samples of lakes or pit books but also the test pieces in the surrounding areas of the sediments. This archive deposit can be used to foresee the changes also in the forest type of taxa and in the landscape. We have done four different cores in lakes in all the valleys and valleys closer to them and a series of test pieces. This is the National Park of Aguastor de San Nicolau Valley and we can see all series of archaeological sites. We have different sites excavated in the bottom valley areas like Coval Sardo and also in the classical circles in the highlands. The chronological sequence of the occupation of these sites starts with only three sediments, three short and frequent sites in Mesolithic times, a series of two sites with an early and mid-Nelitic occupation and eight different archaeological sites from this period that is a child politic from 3,300 to 2,000 to 2,500 years BC when we have the most important presence of historical occupation in the valley. It increased really in 3,000 and 300 years BC. That is the chronology of the ice man oxy from the Alps is when we detect a social change in the management of these areas. This is the site of Coval Sardo located in the bottom valley area when there is a series of fire structures that have been analysed by carapology and anthropology data and we can see the short presence of serial cultivators like Triticon, Durun and Ordeum also in this site of Axel Center Pyrenees and if we have a look to the anthropology data of the different levels of this site we can see there was a primary forest and then in the earliest levels we have a secondary forest. There is an impact on the taxa of wood that people use for fire in the site. For example, this impact can be detected at the fifth millennium ago and later at this chronology of 3,300 years BC is when the human impact is strong. If we look at the final analysis of different structures in the site we can see in these neolithic times at the middle as in there is a presence of thermo mesophilus grass taxa that are actually represented in the present time. So, we can see the spaces represented, the taxa represented different. Also in following analysis we can see something similar and if we have a look to the Yatons and Crassophyces analysed in the legs of the valley the modellization of the temperature for summer for this meteorological time that is in the early neolithic is really different. So, we have temperature higars in this optimum climatic of the meteorological time. Another data series are played in front of one test pit and then at the offsite with a series of analysis and we can see that organic matter is important in a level that we can data that we have data in 7,000 years ago. Exactly when start the first early neolithic occupation in the valley. At this level, if we have a look to the micromorphological analysis we can see the formation of a paleosol when there is an important presence of sedimentary charcoal in a fluvial soil in the bottom valley near to the riverside and we have an important presence of phosphorus in the sediment that could be indicating manoeuvring activities in summer we suppose or autumn when there is no less the bottom valley. Also we have a series of pollen data that are indicating that in this early neolithic occupation we have an important change in the landscape. The first human impact can be detected at the early time around 5,000 BC but there is another one maybe stronger early neolithic time that we can site dating around 3.3 BC this moment of change. While I'm finishing, well another very interesting data from Poland analysis is the presence of serialia taxa in both events early neolithic and late neolithic time. If we have that comparison between the pollen data from the archaeological site and the pollen data from the test pit of the offsite we can co-relationate both and observe that the arborian taxa in the surrounding area of the site is decreased so we think that there is a grassland management in the surrounding area of the settlements. Well, the ideas of these methodologies for understanding how the human societies develop and the economical system we have to study not only the data from the sites but also the pollen environmental data not only for the course from the legs but also using test pits. Final remark I can see if we have a look to all the different course sampling and we see the sedimentary circles we can observe these two events of impact in different sites of the central unit area that we can date in these two moments early neolithic and late neolithic but also this is another one at the branch site. Thank you very much.