Composite pine forests: botanico-geographical differences, origin, distribution
نویسندگان
چکیده
Composite pine forests with nemoral deciduous tree species (Carpinus betulus, Quercus robur, Tilia cordata) are widespread in the broad-leaved forest region of Eastern Europe. They occupy vast ancient alluvial plains sandy and loamy soils, river terraces, along latter they can «come» broad-leaved-coniferous zone. Based on analysis 187 relevés made Bryansk, Kaluga, Moscow Smolensk Regions, classification composite using Braun-Blanquet approach was carried out. As a result classification, two groups communities were identified. One them is oak and/or linden, united ass. Corylo avellanae–Pinetum sylvestris Bulokhov et Solomeshch 2003, other represents nemoral-herb presence spruce some accompanying assigned to Pinus facies Rhodobryo rosei–Piceetum abietis Korotkov Morozova al. 2017. The participation this syntaxon small any layers. Both associations belong class Carpino–Fagetea sylvaticae Jakucs ex Passarge 1968. On latitudinal gradient, differ lime species, which reflected identification subassociations: avellanae-Pinetum typicum (with oak), common zone forests, tilietosum cordatae lime) – southern part origin debatable. Some researchers consider as primary quasi explain their formation existence by various types disturbances, both anthropogenic (selective logging, fires, plantations) natural (for example, fires) character. Disturbed lower frequency diagnostic association classified variant Sambucus racemosa subass. typicum. Hazel composition stand undergrowth (Pinus abietis) found landscapes moraine formed places planting cultures habitats forests. It difficult assign individual one or another syntaxon, especially near border zones, differentiation best seen when analyzing large number relevés.
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ژورنال
عنوان ژورنال: Raznoobrazie rastitel?nogo mira
سال: 2022
ISSN: ['2686-9713']
DOI: https://doi.org/10.22281/2686-9713-2022-3-19-40