ISSN: 0024-1148 Russian Journal of Forest Science. 2016, No. 3, pp. 199-208

Received 2 March 2015

Alder and elm forests of Ulmus laevis, U. glabra, Alnus incana grow on the slopes of the river valleys with exposed carbonaceous substrate in European part of Russia. They occur in highly similar ecotopes and have close floristic and phytocoenotic traits. Their dynamics is continuous cyclic changes from domination of alder to elm due to slope processes. Our study revealed mosaic vegetation patterns associated with topography. Continuous slope processes supported regeneration of grey alder under elm canopy and vice versa. Regeneration of spruce was controlled by the soil type and stand composition.

• Keywords: alder and elm forest, slope processes, ecotopic attribution, cyclic regeneration, eco-coenotic group.

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