Influence of the recreation on southern fir groves ecosystems

On example of forest communities at national park "Valdayskiy" (the rest center "Polar lights") influence of recreation on species diversity and species structure of soil-vegetative complex is studied. Decrease in species diversity and number of types on recreation sites is shown. The top soil horizons, gross chemical composition of soils, emission of carbon dioxide from soil surface are analysed. The authentic increase in soil respiration in the conditions of recreation in comparison with control constant points is revealed statistically. Decrease in capacity and consolidation of the top horizon which correlates with decrease of projective covering of glues and decrease in number of microorganisms and fungi is shown.