Phytoindication of conditions of ecotopes of durmast oak phytocoenosis of the mountainous Crimea on recreation trebd
The position on the axes of environmental factors gradients has been established for the sintaxons of the durmast oaks forest in the Mountainous Crimea using the computer program «Pover» and the database «Ecodate». The minimum, optimal and maximum values for 13 gradient vectors have been determined. Gradients of the factors-conditions and gradients of the factors-environment with unfavorable values in the population range of Quercus petraea (Matt.) Liebl. have been allocated. For the plots with a heahy recreational streess the decrease in the optimal values of the continental climate gradient, humidity, nitrogen content and granulometric texture of substrate is observed and it is higher, than for the conditions, accoding to which the minimal «pressure» on vegetation cover is noticed. Also on the plots with a high stage of degradation the low rates of factor-resource on the nitrogen content gradient are observed, all the plots are in the middle degree of favorableness of this abiotic factor under the conditions of the species growth.