По данным доминантно-детерминантной классификации мезоэвтрофных ельников (из Picea × fennica или P. obovata) гераниевых сфагновых с Geranium sylvaticum s.l. и Sphagnum warnstorfii в северной тайге Европейской России и Урала выделены три субассоциации, две из них соответственно с 4 и 3 вариантами. Северотаежный ареал ассоциации определяется зональным режимом теплообеспеченности, а дифференциация субассоциаций в ее составе – градиентом океаничности/континентальности климата. Subass. cornosum suecicae представлена в Фенноскандии, veratrosum – в бассейне Печоры, а caricosum sabynensis – на Полярном Урале. Дифференциация вариантов зависит от внутриландшафтного положения и обводненности сообществ. Леса всех синтаксонов развиты на силикатных породах. Mesoeutrophic crane's-bill-peatmoss spruce forests, dominated by Picea × fennica or P. obovata, Geranium sylvaticum s.l., and Sphagnum warnstorfii, have been classified in northern-boreal European Russia and the Urals using the dominant-determinant approach to vegetation. 3 subassociations, 2 of them with either 4, or 3 variants, are recognized within the association Piceetum warnstorfii-sphagnoso-geraniosum (see Table 1). The northern-boreal association ranges are determined by the warmth supply regime, whereas the determination and ranges of subassociations are governed by the oceanicity/continentality gradient (see Table 2). Forests of subass. cornosum suecicae are represented on shallow peat in Fennoscandia. Those of subass. veratrosum occur in the Pechora R. basin on deep peat deposits in most variants. Stands of subass. caricosum sabynensis grow on mountain slopes in the Polar Urals. Variants within subassociations are distinguished according to intralandscape positions, paludification, and water flow regime of communities. Forests of all the syntaxa grow in brook valleys and are restricted to silicate bedrock

По данным полевых исследований 1996—2012 гг., в различных регионах средней и северной тайги Европейской России методом доминантно-флористической классификации выделено 6 синтаксонов травяно-зеленомошных (кисличных, папоротничковых, вейниковых и костянично-брусничных) сосновых лесов — 4 ассоциации с 4 субассоциациями. Проанализировано географическое распространение выделенных синтаксонов, их приуроченность к выходам горным пород различных типов.

Phytosociology of xerophytic tundras and cryophytic steppes was studied in the middle reaches of the Amguema River (178 degrees W, 67 degrees N), Central Chukotka.Dryas punctata tundras are represented by a set of new regional associations of the alliance Oxytropidion nigrescentis (Kobresio-Dryadetalia, Caricl-Kobresietea). The association Asahineo chrysanthae-Dryadetum punctatae nov. occurs on low mountain slopes. Subassociation typicum nov. represents the patchy Dryas tundras on screes and subassociation hedysaretosum truncati nov. the closed-up Dryas mountain tundras. On raw soil of river terraces two other associations occur. The Diapensio obovatae-Dryadetum punctatae nov. represents patchy Dryas tundras and contains a subassociation Mops nov. dominating on dry sites, whereas a subassociation vaccinietosum microphylli nov. is found on deeper and more mesic soil. The association Rhododendro camtschatici-Dryadetum punctatae nov. is restricted to watershed sites with slightly increased snow accumulation.The tundra-steppes and steppes of Beringia are placed within a new alliance Androsacio arctisibiricae-Aconogonion laxmannii (Kobresio-Dryadetalia, Caricl-Kobresietea). A suballiance Oxytropidio vassilczenkol-Dryadenion nov. with a single, new association Oxytropidlo-Dryadetum punctatae with three variants, refers to closed-up tundras and tundra-steppes co-dominated by Dryaspunctata and Kobresia myosuroides. A typical suballiance Androsacio-Aconogonenion nov. with two new associations seems transitional to the Pulsatillion flavescentis (Festucetalia lenensis, Cleistogenetea squarrosae) with its center of diversity in the steppes of Yakutia. The association Eremogono capillaris-Caricetum rupestris represents a cryoxerophytic sedge vegetation of wind-exposed ridges (typical variant) and the driest type of the relict Beringian steppe (variant of Helictotrichon krylovii). The association Thymo oxyodonti-Caricetum obtusatae refers to typical cryophytic steppes at the easternmost limit of their distribution in Eurasia. The stands are always restricted to southern slopes and are represented by petrophytic and psammophytic variants.The driest sites of south-facing scree slopes of elevated river banks are grown by vegetation of a new suballiance Astragalo pseudadsurgenti-Calamagrostienion purpurascentis (Pulsatillion flavescentis, Festucetalia lenensis, Cleistogenetea squarrosae). The Astragalo-Calamagrostietum purpurascentis nov. steppes occur on sandy screes, whereas xero-petrophytic semi-dwarfshrub communities of the association Artemisio glomeratae-Salicetum glaucae (with two variants) occur on gravel screes. Artemisietum glomeratae Sumina 1994 is the most open scree vegetation.

Numerous additions are reported for the bryoflora of the Pechora-Ilych Biosphere Reserve (Komi Republic; Northern Urals).Field work was performed in three geographically separated areas, situated in different altitudinal belts in the basin of the Pechora River (61°25'-61°45' N -56°53'-57°10' E; 62°00-11' N -58°05-38' E; 62°00-07' N -59°00-15' E). 81 bryophyte species and varieties have been found to be new to the Reserve, among them 17 species new to Komi Republic, 6 species (Lophozia pellucida, Sauteria alpina, Dicranella humilis, Bryum amblyodon, B. bicolor, Pohlia bulbifera) new to the Northern Urals, and 2 species (Cirri phyllum tommasinii, Pseudocalliergon trifarium) and 2 varieties (Lophozia pellucida var.pellucida, Dicranella schreberiana var.robusta) new to the whole Ural Mts.Thus, the total number of bryophyte taxa known from the Reserve is 319 species and 3 varieties of mosses and 91 species and 2 varieties of hepatics.The following abbreviations are used in the list of species: R -rare (species known from 1-3 localities within the study area); MC -moderately common (4-8 localities); C -common (9 and more localities); S+ means that sporophytes are present.Species new to Komi Republic are marked with (*), those new to the Northern Urals with (+). ÐåçþìåÍà òåððèòîðèè Ïå÷îðî-Èëû÷ñêîãî çàïîâåäíèêà (Ðåñïóáëèêà Êîìè, Ñåâåðíûé Óðàë) îáñëåäîâàíû òðè ó÷àñòêà â áàññåéíå ðåêè Ïå÷îðû.Îáíàðóaeåí 81 íîâûé äëÿ çàïîâåäíèêà òàêñîí ìîõîîáðàçíûõ, â òîì ÷èñëå 17 âèäîâ -íîâûå äëÿ Ðåñïóáëèêè Êîìè, 6íîâûå äëÿ Ñåâåðíîãî Óðàëà (Lophozia pellucida, Sauteria alpina, Dicranella humilis, Bryum amblyodon, B.

The same vascular plant species occur in communities of different types in different parts of their ranges. This phenomenon can be traced in both the latitudinal and the longitudinal directions. Changes in plant affinity to communities of different types are viewed by the example of the North-European forest studied in 1993-2001. Species occurring near their range limits, prefer habitats with smoothed amplitudes of minimum factors ("the law of preference for non-varying environments"). That's why Oxalis acetosella and other boreal-nemoral species demonstrate affinity to riparian forests of the middle-boreal subzone. Another cases of latitudinal change in ecological behavior may be caused by decrease in competitive ability (in Milium effusum), respective changes in the regeneration niche (in Cystopteris fragilis), or behavior of birds dispersing seeds (in Lonicera xylosteum). The longitudinal variation in plant behavior, as viewed by the example of the European-Siberian riparian-subalpine tall-herb synusia, is connected with the post-glacial plant migration in the European North. There is a lot of evidence for the individualistic character of the process, but it looks coherent in the historical retrospective. The possible role of refugia and long-distance dispersal in the process of formation of the present-day ranges of species is briefly reviewed. Conditions for plant dispersal in the past seemingly differ from those nowadays observed. The principal factor, which governs the dispersal rate, is that of interspecific competition level. Plant dispersal could be rather fast in the course of the corresponding primary succession following the glacier retreat or the marine retrogression (the "impulse" hypothesis). Since the climax pattern is established running waters and disturbed lands serve as "migration channels" for plants.