Vegetation cover of forest phytocenoses of the Kologrivsky forest nature reserve

When studying the structure of plant communities, only a description of the floristic composition is insufficient, but it is necessary to identify functional relationships between individual plant species, between plants and the environment, the abundance and ecological-coenotic groups of species. The purpose of the study is to identify the features of the vegetation cover of forest phytocenoses according to observations on permanent sample plots in the conditions of the Kologrivsky Forest Nature Reserve (Kostroma region). The object of the study was 34 permanent trial plots laid out on the Kologrivsky (28 trial plots) and Manturovsky areas of the reserve (6 trial plots). The study used survey data from 2018–2022. The analysis of geobotanical descriptions on the permanent sample plots of the Kologrivsky Forest Nature Reserve made it possible to identify seven main groups according to the common vegetation cover, each of which is characterized by an individual ecological and coenotic spectrum: i) pine formations with a predominance of heather in the herbaceous layer of the Manturovsky area, ii) linden-elms spruce forests, iii) native spruce forests and plantations derived from them in places of old clearings, iv) forest stands in areas with disturbed soil cover with a predominance of the meadow-edge ecological-coenotic group, v) spruce stands with a disturbed structure of the upper canopy and vi) forest stands on areas with disturbed soil cover with a predominance of boron ecologicalcenotic group; vii) blueberry pine forests of the Manturovsky area. Ordinations of geobotanical descriptions in abstract axes of factors according to D.N. Tsyganov ecological scales made it possible to distinguish two main groups of habitats: i) with strongly acidic/acidic soils, very poor/poor nitrogen in perhumid climatic conditions, where the received solar heat is not enough to evaporate the incoming moisture; ii) with acidic/slightly acidic soils poor in nitrogen, belonging to the euhumid ecological group. On the sample plots under study, observations should be continued to identify dynamic processes in the composition and structure of the vegetation cover without the impact of anthropogenic factors under the conditions of the protected regime of the territory.

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