E.V. Nevidomova - Ph.D. (Biol.), Associate Professor, Nizhniy Novgorod State Pedagogical University. E-mail: elena.nevidomova@yandex.ru
A.M. Nevidomov - Ph.D.(Agric.), Director, Central Scientific Research Institute of Forestry and Wood-Chemical Industry, Nizhny Novgorod
A.A. Sporisheva - Student, Nizhniy Novgorod State Pedagogical University

This work studies the influence of antropogehic factors to the coenopopulations Vacсinium myrtillus L., Vacсinium vitis idaea L., Oxycoccus palustris Pers. (Ericaceae) in the forest phytocoenoses of the green area Pavlovsky district Nizhegorodsky region. At present the forest phytocoenoses of the Pavlovsky district is feeling a big load of recreation. During this process the thickness and structure of his forest litter, whose role is very important, are changed. The forest litter supplies organic matters and regulates the microclimate. Alterations of the forest litter at the infringed phytocoenoses are manifesting more also in the correlations between vital forms of plants. The rhythmic and sizes of the main predominating species are changed. For example, a height of the stem Vacсinium myrtillus L of at the forest phytocoenoses in the first stage of digressive reaches max 45 centimetres, being the thickness of the forest litter 28 centimetres. At the forest phytocoenoses of the third stage of digressive thickness of the forest litter 5 centimetres it reaches 25 centimetres. Therefore, aiming the preservation of species, it is necessary to establish the control of a number of plant populations, the introduction to botanic gardens, the organization of forest reserves.