Climatic modelling software was used in order to measure future changes in climatic conditions. The software HYPE can realize prognosis for certain climatic factors responsible for causing extreme climatic phenomena in forest ecosystems. It was applied to study sessile oak forest ecosystems from Transylvania. Sample surfaces were installed, inventoried and followed by simulations of two future climatic scenarios. Two such scenarios were chosen, namely the climatic scenario in which the gas effect concentration will increase moderately (rcp-4.5) and the climatic scenario in which the gas effect concentration will be accentuated (rcp-8.5). The data was then processed and which led to an analysis of the way in which future climatic changes will affect forest ecosystems located in the studied area. After analyzing all three sessile oak stands, we can conclude that the Mediaș stand is the most vulnerable one to both climatic parameters. Future climatic scenarios are necessary for other surfaces located in our country for the same species, as well as for others in order to have a bigger picture of future implications. The best management measures and decisions regarding the installment of future stands can consequently be taken based on these results.

The present article describes the plants collected from Jepi Mountains area (Bucegi) and present in one of the most important Romanian herbarium -"Alexandru Beldie" Herbarium from "Marin Drăcea" National Institute for Research and Development in Forestry. The article presents the studied material, the number of vouchers with species harvested from this area as well as some characteristics of this great plant collection. The most important species collected from Jepi Mountains are also mentioned, with an analysis of their characteristics: the collection's creation period and the plant's harvesting periods. The plants collected from this area belong to 54 different genera. Most of them belong to Hieracium and Gentiana and were collected during the last century, starting with 1900 and ending in 1999. The found genera were systematized, with an emphasis on the most representative ones. Furthermore, the specialists that had an important contribution for the representation of Jepi Mountains within the herbarium are also mentioned and honored.

A climatic modelling program was used in order to see the extent of changes in future climatic conditions. This can realize prognosis for certain climatic factors that cause extreme climatic phenomena concerning forest ecosystems. The program was applied for forest ecosystems comprised of Scots pine, installed and inventoried on sample surfaces from Transylvania. Simulations were then created within two future climatic scenarios. Two scenarios were chosen: the climatic scenario in which the increase of greenhouse gases would be moderate (rcp-4.5) and the climatic scenario in which the increase would be accentuated (rcp-8.5). The data was then processed, resulting in an analysis focused on the results of future climatic changes on forest ecosystems located in the studied area. By analyzing all three pine stands, we can conclude that the Lechinta stand is the most vulnerable one if the two climatic parameters change. It is necessary to verify and use future climatic scenarios for other areas that have the same species, as well as for other species, in order to see how they will be affected. These results can be used for applying the best management measures for current stands as well as for establishing decisions for installing future stands at a national level.