Publications
Lichens and allied non-lichenized fungi of virgin forests in the Caucasus State Nature Biosphere Reserve (Western Caucasus, Russia)
A comprehensive survey of lichens and allied fungi in the Caucasus State Nature Biosphere Reserve revealed 659 species, including 149 new to the Northern Caucasus and 50 previously unknown in Russia. The study, conducted across seven one-hectare plots along an altitudinal gradient, identified a diverse range of epiphytic and epixylic species, with macrolichens comprising 26.5–40% of the total. Notably, the research found negligible effects of acidification or nitrogen emissions on lichen diversity, with cyanolichens remaining abundant across all plots. Beech and fir trees were the most preferred substrates, though most lichen species exhibited low substrate specificity. The highest species richness was observed in a plot outside the reserve, prompting recommendations for its inclusion to expand protected areas.
Elevational Distribution of Alien Plant Species in the Western Caucasus
Alien plant species in the Western Caucasus exhibit a distinct elevational distribution, with maximum richness concentrated in lower, more climatically favorable zones where human activity is highest. Of 100 alien species studied—comprising herbaceous (59%) and arboreous (41%) plants—most originate from North America and East Asia, and 57% are cultivated. Species diversity declines with elevation, with only 17 species found above 1000 m a.s.l., primarily accidental annual herbs of North American origin. Notably, Matricaria suaveolens is the sole alien species recorded above the timberline (2000 m a.s.l.). The study highlights differences between southern and northern macroslopes, attributing the penetration of aliens into upper belts to human activities such as road construction and tourist infrastructure development.
Environment of Viewpoint Geosites: Evidence from the Western Caucasus
Viewpoint geosites, which offer panoramic views of unique geological features and landscapes, are significantly influenced by their environmental context. This study introduces a new framework to evaluate the environment of such sites using three components: standpoint environment, transitional environment, and target environment. Each component is assessed based on criteria like the presence of geological elements, vegetation cover, anthropogenic intervention, fragmentation, and contrast. Analyzing three geosites in the Western Caucasus, researchers found that environmental differences between these sites had a more substantial impact than variations in their displayed geoheritage features. This innovative approach to evaluating viewpoint geosites provides a broader application and justification for future environmental assessments.
Robinia pseudoacacia L. in the Western Caucasus
Robinia pseudoacacia L., commonly known as black locust, does not reduce arboreal species diversity in riparian forests of the Western Caucasus despite its increasing dominance over native tree species. The study, conducted by Akatov et al. (2016), reveals that while R. pseudoacacia is most abundant where native dominants hold a middle-level presence, its proliferation does not negatively impact overall forest diversity. Researchers analyzed distribution, age structure, and population dynamics across the region, finding that most individuals are under 20 years old, suggesting rapid colonization but limited long-term persistence. The study highlights the resilience of riparian forests to invasive species, offering insights into ecological succession and conservation strategies for UNESCO World Heritage Sites like those in the Western Caucasus.
Calibration of a mathematical model of Marukh Glacier, Western Caucasus
A three-dimensional mathematical model of Marukh Glacier in the Western Caucasus has been developed and calibrated, offering a robust tool for predicting glacier evolution under changing climatic conditions. The model integrates field data from radio-echo-sounding, topographic and gravimetrical measurements, alongside meteorological observations from Klukhorsky Pereval station. Calibration focused on optimizing parameters to minimize deviations between calculated and observed flow velocities and surface mass balance, ensuring high accuracy. This approach provides a foundation for future prognostic calculations of glacier dynamics in the Caucasus region, addressing critical questions about glacial response to climate change.
The world's deepest subterranean community - Krubera-Voronja Cave (Western Caucasus)
An expedition to Krubera-Voronja Cave, the world's deepest cave at over 2140 meters, uncovered a previously unknown subterranean community of arthropods, including more than 12 species, some of which are new to science. This discovery challenges the notion that deep subterranean ecosystems are evolutionary dead ends, instead highlighting their role as shelters for epigean species during harsh surface conditions. The study also revealed the vertical distribution of invertebrate fauna, from the cave entrance to its deepest reaches, and identified the world's deepest dwelling arthropod. The research suggests that these deep ecosystems rely heavily on allochthonous organic carbon sources, such as water percolation and sinking streams, for their survival.
Upper Jurassic Reefs from the Russian Western Caucasus: Implications for the Eastern Black Sea
Upper Jurassic reefs in the Russian Western Caucasus reveal diverse and structurally controlled reef complexes that serve as potential analogues for exploration targets in the eastern Black Sea. These reefs, categorized into coral-dominated, siliceous sponge-microbialite, and microbialite types, developed on two Late Jurassic carbonate platforms: the North Caucasus platform to the north and the South Adler platform to the south. Coral-dominated reefs, found at shallow-water platform margins and deeper mid-shelf settings, exhibit varying diversity levels, while siliceous sponge- and microbialite-dominated reefs were restricted to deeper-water environments. The study suggests that these outcrops could provide critical insights for understanding seismic-imaged reef complexes on the Shatskiy Ridge, depending on their palaeowater depth.
Geological history of Western Caucasus and adjacent foredeeps based on analysis of the regional balanced section
A balanced geological section of the Tuapse foredeep-Western Caucasus-Western Kuban foredeep system reveals that the Western Caucasian basin existed as a rift from the Callovian to Eocene periods, with its principal inversion occurring during the Oligocene-Miocene. The region transitioned into an orogeny phase by the Pliocene-Quaternary, indicating significant tectonic activity. The study suggests that Caucasus compression extended over 30 km within this area. Using seismic evidence and other geological data, researchers reconstructed the region's history to provide insights into its long-term geological evolution.
Mountain-meadow soils of the highlands in the Western Caucasus
Mountain-meadow soils in the Western Caucasus exhibit distinct mineral and organic transformations driven by soil formation processes, with two dominant elementary processes: humus accumulation and clay formation. These processes are mediated by soil biota and shape the chemical element profiles of these soils. The study analyzes published and original data on soil morphology, substance composition, physicochemical properties, total chemical and mineralogical composition, and micromorphology to characterize these transformations. It also proposes improvements for the classification of mountain-meadow soils based on these findings.
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