Forty years spontaneous changes in species composition of natural and seminatural forest association in the Roztocze National Park, south-eastern PolandZbigniewMaciejewskiRoztoczanski National ParkPlazowa, 2Zwierzyniec22PolandZbigniewMaciejewskiassociatedPartyprof. dr hab. JerzySzwagrzyk, dr Robert Zubel (bryofites)Co-owner2013-01-17Investigations were conducted in natural and semi natural forests, in the strictly and partially protected areas of the Roztoczanski National Park (south-eastern Poland). Measurements of tree stands were carried out in 12 rectangular study plots, each of 0.5 ha size, established in the nineteen sixties in 4 forest communities: Abietetum polonicum, Dentario glandulosae-Fagetum, Querco roboris-Pinetum and Leucobryo Pinetum as well as in secondary forest communities of the Querco-Fagetea and Vaccinio-Piceetea classes. All trees which diameter at breast height exceeded 7 cm were considered as a forest canopy trees, and the smaller ones as forest regeneration. In the latter category individuals which height exceeded 0.5 m were considered as saplings, and the ones below 0.5 m as seedlings. This year regenerations were considered as germinants. Measurements of the canopy trees included their diameters (measured in two perpendicular directions), heights and height of their crown base. Besides, each stand tree (both alive and dead) was numbered and its coordinates (x, y) within the plot were measured. Forest regeneration as well as shrubs were counted throughout the study plots (saplings) or in the sample subplots (seedlings and germinants) Regenerations in the sample subplots were labeled, described, and measured (height, diameter of their base and 3-years height increment). Injures from herbivores were estimated too.
Dead lying trees were numbered, measured (length of the trunk, diameter - dbh) and their stages of decay has been estimated. In each small sample plot the species of vascular plants and bryophytes were recognized and described as well as main types of site substrates and solar circumstances were estimated.
The main aims of this study was to answer the following questions:
4. What are the current directions of spontaneous transformations in the phytocoenoses examined in natural (virgin) and seminatural forests, especially as climatic changes, habitat eutrophication and plant cover changes related to them are observed?
5. Is spontaneous regeneration of the natural forest from previously planted stands possible, when human intervention ceases or is the stand conversion necessary?
6. Is the stand conversation really accelerate regeneration of natural forest communities or establishing their artificial character.Obtain permission from data set owner(s)The Roztocze Highlands (Roztoczanski National Park, South-Eastern Poland)22.933123.116751.666751.51671968Central European species of trees, shrubs, vascular plants and bryophytes; for details please see enclosed publicationsspecies leveltreesspecies levelshrubsspecies levelvascular plantsspecies levelbryophytesZbigniewMaciejewskiRoztoczanski National ParkPlazowa, 2Zwierzyniec22Polandzbigniewmaciejewski@wp.pl Well known metods applied in forestry and forest ecology researchFor details please see enclosed publicationsattached_fileNot authorized to access resourceOtherattached_fileNot authorized to access resourceOtherattached_fileNot authorized to access resourceOther timeseries For details please see enclosed publications other Different Temporal Resolution for different stand layer and periods Climatic data for the area of âÃÂÃÂâÃÂÃÂstudy are collected from the 90s of the twentieth century by Roztocze National Park and Roztoczanska Scientific Stations
of Maria Curie-Sklodowska University. They are also available some meteorological data from the 60s and 70s of the twentieth century. Changes of species composition and abundance resulting from regeneration effectiveness, mortality, natural disturbances, changes of site conditions For the research area the following data are available: climate, changes of land use intensity, air pollutions and changes of groundwater level. Part of the data has been collected as a result of Integrated Environmental Monitoring Programme