The study aimed to assess changes in the intensity of spruce drying in different forest types and at different altitudes, addressing the time factor. The research was conducted in the central part of the Gorgan Mountain range in its foothills (the Bystrytsia Solotvynska river basin) on an altitude-typological profile. The degrees of decomposition of dead wood were characterised to determine the following types of trends in the spruce drying process in different types of forests and tree species composition: fading with a decrease in intensity over time; weakly expressed with significant fluctuations in drying out in individual years; intense with an annual increase in the phenomenon. The duration and dynamics of these trends for different forest vegetation conditions were noted. On the example of three forestries, the annual dynamics of spruce drying areas in the period from 2016 to 2024 for the spectrum of vertical vegetation belts available in the Gorgany was presented in the following sequence: foothill fir-oak, mountain beech-fir, beech-fir-spruce and pure spruce forests. The results of the statistical analysis indicate that spruce drying processes are multidirectional, depending on the gypsometric levels of the relief and the associated altitudinal zonation. The study determined that in foothill fir-oak forests, the intensity of spruce drying decreases. This pattern was somewhat less pronounced in the lower mountainous zone of beech and fir forests (500-600 m). In the altitudinal range of 650-1000 m (the upper part of the beech-fir belt and the lower part of beech-fir-spruce forests), the intensification of spruce drying is notable. The study demonstrated that at altitudes above 1000 m, patterns in the drying of spruce forests are not pronounced, as this phenomenon is sporadic. The practical significance of the research results is reduced to their use in differentiated measures to enhance the sustainability of stands in different altitudinal zones
altitudinal zones, forest types, stand composition, dead wood, empirical dependencies
[1] Bace, R., et al. (2023). Response of habitat quality to mixed severity disturbance regime in Norway spruce forests. Journal of Applied Ecology, 60, 1352-1363. doi: 10.1111/1365-2664.14409.
[2] Beley, L.M., Kutsiv, L.P., Kosylo, L.S., Vaskul, N.M., & Thorous, V.D. (2022). On the drying of European spruce (fir) in the western part of the Yamnyansky PDP of the Carpathian National Nature Park: Forest typological aspect. In Region-2022: Strategy for optimal development: Materials of the international scientific and practical conference (pp. 113-115.). Kharkiv: V.N. Karazin Kharkiv National University.
[3] Bowditch, E., et al. (2020). What is Climate-Smart Forestry? A definition from a multinational collaborative process focused on mountain regions of Europe. Ecosystem Servises, 43, article number 101113. doi: 10.1016/j.ecoser.2020.101113.
[4] Brodovych, Y., & Brodovych, R. (2023). Distribution and ecological characteristics of natural forest resources in the Ukrainian Carpathians. In Modern trends in the development of science and education in the context of deepening European integration processes (pp. 338-339). Mukachevo: Mukachevo State University.
[5] Convention on Biological Diversity. (1992, June). Retrieved from https://zakon.rada.gov.ua/laws/show/995_030#Text.
[6] Convention on the Trade in Endangered Species of Wild Fauna and Flora. (1973, June). Retrieved from https://zakon.rada.gov.ua/laws/show/995_129#Text.
[7] Gordeeva, E., Weber, N., & Wolfslehner, B. (2022). The new EU forest strategy for 2030 ‒ an analysis of major interests. Forests, 13(9), article number 1503. doi: 10.3390/f13091503.
[8] Hilmers, T., et al. (2019). The productivity of mixed mountain forests comprised of Fagus sylvatica, Picea abies, and Abies alba across Europe. An International Journal of Forest Research, 92(5), 512-522. doi: 10.1093/forestry/cpz035.
[9] Hrynyk, H.H., & Hrynyk, O.M. (2022). Growth and productivity of European spruce stands in the Ukrainian Carpathians depending on the topography. Lviv: Spolom.
[10] Hrynyk, H.H., Pukman, V.V., Buniy, V.Ya, & Kostryba, M.V. (2010). The health state analysis of mountain spruces forests of Ivano-Frankivsk region of the basis of monitoring studies, 2006-2009. Proceedings of the Forestry Academy of Sciences of Ukraine, 8, 106-111.
[11] Hudyma, V.D., Haida, Y.I., Hudyma, V.M., & Yatsyk, R.M. (2014). Natural regeneration of European spruce (Picea abies (L.) Karst.) in the forests of the northern mega slope of the Ukrainian Carpathians. Forestry and Agroforestry, 125, 3-10.
[12] Kramarets V., Matsiakh І., & Boiko О. (2024) Improving the technology of growing planting material as a prerequisite for the restoration of native forest stands. In Forests of nature reserves in conditions of global changes (рр. 142-144). Skole: Skole Beskydy National Nature Park.
[13] Krejza, J., Cienciala, E., Světlík, J., Bellan, M., Noyer, E., Horáček, P., Štěpáne, P., & Marek, M.V. (2021). Evidence of climate‐induced stress of Norway spruce along elevation gradient preceding the current dieback in Central Europe. Trees, 35(1), 103-119. doi: 10.1007/s00468-020-02022-6.
[14] Lavnyy, V., & Pelyukh, O. (2019). Distribution and analysis of the state of secondary spruce stands in the Ukrainian Carpathians. Proceedings of the Forestry Academy of Sciences of Ukraine, 19, 60-67. doi: 10.15421/411927.
[15] Matusevych, O.B. (2022). Silvicultural characteristics and taxation indices of spruce stands on the north-east megaslope of the Ukrainian Carpathians in main forest types. Scientific Bulletin of UNFU, 32(5), 28-35. doi: 10.36930/40320504.
[16] Oliinyk, V.S., & Zeinalian, A.M. (2020). Altitude features of spruce decline on the north-eastern megaslope of Ukrainian Carpathians. Forestry and Forest Melioration, 136, 19-24. doi: 10.33220/1026-3365.136.2020.19.
[17] Schuck, A., Meyer, P., Menke, N., Lier, M., & Lindner, M. (2004). Forest biodiversity indicator: dead wood – a proposed approach towards operationalising the MCPFE indicator. EFI-Proceedings, 51, 49-77.
[18] Shparyk Y.S., & Parpan T.V. (2020). Trends of spruce forests’ decline in the Ukrainian Carpathians: Case studying the wet mesotrophic common beech – silver fir – Norway spruce forest type. Forestry and Forest Melioration, 136, 37-45. doi: 10.33220/1026-3365.136.2020.37.
[19] Shparyk, Y., Krynytskyy, H., & Debryniuk, I. (2020). Trends of dynamics in the site conditions types and species composition of the forest stands in the Ukrainian Carpathians caused by climate changes. Proceedings of the Forestry Academy of Sciences of Ukraine, 20, 82-92. doi: 10.15421/412008.
[20] Shyshkanynets, I., Lutak, V., Fennich, V., & Mihaly, A. (2021). Natural renewal and grass cover in derivative spruce stands of the national natural park “Zacharovanyi Krai”. In New technologies in geodesy, land management and environmental management (pp. 163-168). Uzhhorod: Hoverla.
[21] SOU 02.02-37-476:2006. (2007). Trial plots are forested. Laying method. Kyiv: Ministry of Agrarian Policy of Ukraine.
[22] Spiecker, H., & Kahle, H.-P. (2023). Climate-driven tree growth and mortality in the Black Forest, Germany – long-term observations. Global Change Biology, 29(20), 5908-5923. doi: 10.1111/gcb.16897.
[23] Stoyko, S.M. (2012). Anthropogenic changes in the Ukrainian Carpathian forests and vegetation stages as ecosystem models of renaturalization of transformed phytocoenoses. Bulletin of Lviv State University of Life Safety, 6, 196-20.
[24] Synek, M., et al. (2020). Contrasting patterns of natural mortality in primary Picea forests of the Carpathian Mountains. Forest Ecology and Management, 457, article number 117734. doi: 10.1016/j.foreco.2019.117734.
[25] Taccoen, A., Piedallu, C., Seynave, I., Gégout-Petit, A., & Gégout, J.-C. (2022). Climate change-induced background tree mortality is exacerbated towards the warm limits of the species ranges. Annals of Forest Science, 79(1), article number 23. doi: 10.1186/s13595-022-01142-y.
[26] Taccoen, A., Piedallu, C., Seynave, I., Perez, V., Gégout-Petit, A., Nageleisen, L.-M., Bontemps, J.-D., & Gégout, J.-C. (2019). Background mortality drivers of European tree species: Climate change matters. Proceedings of the Royal Society B: Biological Sciences, 286(1900), article number 20190386. doi: 10.1098/rspb.2019.0386.
[27] Tkachuk, O., & Zeynalian, А. (2023). Influence of abiotic factors on the drying of spruce forests in the Carpathian region. In The current state, problems and prospects of forestry education, science and production (pp. 47-50). Bila Tserkva: Bila Tserkva National Agrarian University.
[28] Vyshnevskyi, V.I., & Donich, O.A. (2021). Climate change in the Ukrainian Carpathians and its possible impact on river runoff. Acta Hydrologica Slovaca, 22(1), 3-14. doi: 10.31577/ahs-2021-0022.01.0001.
[29] Yue, C., Kahle, H.-P., Klädtke, J., & Kohnle, U. (2023). Forest stand-by-environment interaction invalidates the use of space-for-time substitution for site index modelling under climate change. Forest Ecology and Management, 527, article number 120621. doi: 10.1016/j.foreco.2022.120621.
[30] Zeinalian, A.M. (2021). Structural changes of declining Norway spruce (Picea abies (L.) H. Karst.) forests in the Gorgany Mountains. Scientific Bulletin of UNFU, 31(6), 35-40. doi: 10.36930/40310604.