Determining the role of trees in the water cycle and their impact on soil moisture and atmospheric humidity is crucial. This study aimed to investigate the patterns of leaf transpiration in Quercus robur and Acer campestre in a maple-oak forest under varying water supply conditions. The research was conducted in the lower third of the lower third of the north-facing slope and the middle third of the south-facing slope in the Viiskova ravine. A silvicultural and taxation survey of model trees was conducted on both sample plots, where the plantations are moderately dense. The diurnal course of transpiration patterns of these deciduous species was studied throughout the vegetation period. This physiological process reached its highest values in both species on the north-facing slope during the summer months, especially in Quercus robur. On the south-facing slope, in May and June, the average daily transpiration values in both species were almost indistinguishable. During the remaining months of the vegetation period, the intensity of water evaporation by Quercus robur leaves was statistically higher than that of Acer campestre. It was established that on the south-facing slope, under more arid conditions, this process is less active. This pertains to the daily transpiration loss of water by leaves per unit of their mass, monthly transpiration, and the intensity of this process per tree. The difference between the results of water loss by the leaves of a single Quercus robur and Acer campestre tree is significant and is attributed to the lower transpiration rate of Acer campestre, except in May and June under xerophytic conditions, as well as the smaller leaf mass of this species. Both Quercus robur and Acer campestre are hydrostable medium-transpiring species. The maple forest on the north-facing slope evaporates 30.6% more moisture per 1 ha per vegetation period than on the south-facing slope. The results obtained indicate that Acer campestre in a maple-oak forest, under fresh and dry forest-growing conditions, does not pose a significant competition for moisture for Quercus robur when they grow together. The results obtained can be used to develop effective forest management strategies in maple-oak forest
leaf water evaporation, common oak, field maple, forest-growing conditions, ravine forests
[1] Asbjornsen, H., Tomer, M.D., Gomez-Cardenas, M., Brudvig, L.A., Greenan C.M., & Schilling, K. (2007). Tree and stand transpiration in a Midwestern bur oak savanna after elm encroachment and restoration thinning. Forest Ecology and Management, 247(1-3), 209-219. doi: 10.1016/j.foreco.2007.04.043.
[2] Belgard, A.L. (1971). Steppe forestry. Moscow: Forestry Industry.
[3] Bessonova, V.P. (2006). Workshop on plant physiology. Dnipro: IE A.L. Svidler.
[4] Bessonova, V.P., Yakovlieva-Nosar, S.O., Ivanchenko, O.E., & Aleksandrova, O.V. (2023). Characteristics of transpiration of Quercus robur L. and Acer campestre L. in the oak-field maple forest of Viyskova ravine. In Proceedings of IX International scientific and practical conference “Modern problems of science, education and society” (pp. 43-50). Kyiv: Scientific Publishing Center “Sci-conf.com.ua”.
[5] Beydeman, I.N. (1957). Water-salt regime of plants and plant communities in desert areas of the Caucasus. Congress of Botanical Society, 2, 17-25.
[6] Brodribb, T.J., Powers, J., Cochard, H., & Choat, B. (2020). Hanging by a thread? Forests and drought. Science, 368(6488), 261-266. doi: 10.1126/science.aat7631.
[7] Buksha, I.F., Bondaruk, M.A., Tselyshchev, O.G., Pyvovar, T.S., Buksha, M.I., & Pasternak, V.P. (2017). Vitality forecasting for Scots pine and English oak in condition of climate change in the lowland of Ukraine. Forestry and Forestry Melioration. 130, 146-158. doi: 10.33220/1026-3365.141.2022.23.
[8] Celniker, Yu.L. (1958). On indicators of water regime of leaves of tree species of the steppe zone. In Proceedings of the Institute of Forestry (vol. 41, pp. 33-53). Moscow: Vysshaya Shkola.
[9] Convention on Biological Diversity. (1992, June). Retrieved from https://zakon.rada.gov.ua/laws/show/995_030#Text.
[10] 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.
[11] Descals, A., Verger, A., Yin, G., Filella, I., & Penuelas, J. (2023). Widespread drought-induced leaf shedding and legacy effects on productivity in European deciduous forests. Remote Sensing in Ecology and Conservation, 9(1), 76-89. doi: 10.1002/rse2.296.
[12] Ellison, D., et al. (2017). Trees, forests and water: Cool insights for a hot world. Global Environmental Change, 43(51), 51-61. doi: 10.1016/j.gloenvcha.2017.01.002.
[13] Ffolliott, P.F., Stroplu, C.L., Kauffman, A.T., & Gottfried, G.J. (2008). Transpiration of oak trees in the oak savannas of the southwestern borderlands region. Hydrology and Water Resources in Arizona and the Southwest, 38, 23-28.
[14] Ganaba, D.V. (2016). The intensity of transpiration of woody plants during the drought in different ecological zones of the city of Khmelnytskyi. Scientific Progress & Innovations, (1-2), 113-117. doi: 10.31210/visnyk2016.1-2.22.
[15] Gao, G., Wang, D., Zha, T., Wang, L., & Fu, B. (2022). A global synthesis of transpiration rate and evapotranspiration partitioning in the shrub ecosystems. Journal of Hydrology, 606, article number 127417. doi: 10.1016/j.jhydrol.2021.127417.
[16] Ivanov, L.A., Silina, A.A., & Сelniker, Yu.L. (1952). On transpiration of field protective species in conditions of Derkul steppe. Botanical Journal, 37(2), 21-29.
[17] Jay, A., (2018). Overview. In Impacts, risks, and adaptation in the united states: fourth national climate assessment (pp. 33-71). Washington: U.S. Global Change Research Program. doi: 10.7930/NCA4.2018.CH1.
[18] Karpenko, V.I. (2013). Silvicultural properties of related species in oak forests of the Forest-Steppe of Ukraine. Scientific Bulletin of NULES. Series: Forestry and Ornamental Gardening, 187(1), 248-253.
[19] Katsulyak, Yu.D. (2009). Рlantations of oak common participation aborigines that introducent duickness forest vegetation species of the Рrecarpathia Region. Scientific Bulletin of UNFU, 19(2), 31-40.
[20] Krivoruchko, A.P. (2019). Transpiration in Quercus rubra and Quercus robur mixed-species stand versus monocultures in the Steppe of Ukraine. Problems of Bioindications and Ecology, 24(1), 23-35. doi: 10.26661/2312-2056/2019-24/1-02.
[21] Landblad, M., & Lindroth, A. (2002). Stand transpiration and sapflow density in relation to weather, soil moisture and stand characteristics. Basic and Applied Ecology, 3(3), 229-243. doi: 10.1078/1439-1791-00099.
[22] Larcher, W. (1980). Physiological plant ecology. Berlin: Springer. doi: 10.1007/BF02851882.
[23] Lyalko, V.I., Levchik, O.I., & Sakhatsky, O.I. (2012) Estimation of transpiration using satellite images for regional water balance evaluation. Geoinformatics, 2(42), 60-66.
[24] Obraztsova, V.I., & Kotsyubinskaya, N.P. (1976). Transpiration of petiole oak and common ash in different forest conditions. Issues of Steppe Forestry, 6, 76-82.
[25] Shpak, N.P., Shlapak, V.P., & Leontyak, G.P. (2017). Some peculiarities of cultivation of common oak stands involving bereka medicinal in Southern Podillya. Scientific Bulletin of UNFU, 27(3), 71-74. doi: 10.15421/40270315.
[26] Silina, A.A. (1958). Influence of transpiration of some tree species on transpiration of others when growing together in the forest-steppe. Proceedings of the Forest Institute, 41, 96-103.
[27] Svyrydenko, V.E., Babich, O.G., & Kirichok, L.S. (2004). Forestry. Kyiv: Aristey.
[28] Vasilenko, I.A., Pivovarov, O.A., Trus, I.M., & Ivanchenko. A.V. (2017). Urban Ecology. Dnipro: Accent.
[29] Weiskopf, S.R., et al. (2020). Climate change effects on biodiversity, ecosystems, ecosystem services, and natural resource management in the United States. Science of the Total Environment, 733, article number 137782. doi: 10.1016/j.scitotenv.2020.137782.