Abstract
In this paper a study of forest vegetation in the territory of East Rodopi based on satellites, GPS and other ground-based data is presented.The local areas of forest communities in classes and their distribution depending on the topography are defined. In this study we analyzed the Normalized Deferential Vegetation Index (NDVI) between forest classes. The study is the result of cooperation between specialists from SSTRI-BAS and Sofia University. This study is the initial stage of a comprehensiveresearch on the dynamics and development of natural systems in Bulgaria.
Key words: ecological dynamics, forest community, satellites data, East RodopiMts.
Introduction
The local ecological changes as an element of global changes are as a result of phenomena and processes that induce different effects in the biosphere. The dynamics in the main elements of the biosphere are the reason for unning of various processes and phenomena associated with changes in environment quality. In this case, ecological control is needed to preserve the characteristics of the environment. The control gives an opportunity, based on a study on ecological dynamics elements, for identifying the acting factors and for predicting forthcoming processes with an aim to ensure the sustainable developmentof the biosphere. The forest vegetation is one of the natural components that have significant ecological meaning as a climatogenic, edafogenic and water regulating factor for specific regions and for the biosphere as a whole. The study on the state and changes in the areas occupied by forests has important practical significance for assessing the changes in the environment, for predicting such changes and formation of appropriate environmentally-friendly management of forest resources for sustainable development of regions against the appropriate use of resourcesand environmentconservation [1, 2]. The rational approach for disclosure of the dynamics of local areas and of forest communities is based on the application of modern information technology when ecological studies and ecological monitoring are conducted using satellite, GPS and other ground data. The main purpose of modern geoinformation technologies is the creation of dynamic local and global environmental databases needed to conduct a complex analysis and assessment of forest communities and environmental characteristics. The problem of ecological dynamics of vegetation was studied by one of the authors, i.e. status and distribution of vegetation cover in the Chuprene reserve is assessed by spatial models in GIS environment. [3]. The purpose of the present study is a research on some elements of the ecological dynamics of forest vegetation in other area – East Rodopi, by using an original methodical approach for interpretation and implementation of satellites and ground data.
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