Favourable and Restrictive Factors for Quercus pubescens in the Transylvanian Basin, Evaluated by GIS Techniques
Keywords:ecological factors; downy oak; GIS modelling; interpolation
A very simple analysis of the forested areas across the Transylvanian Basin shows that they cover approximately 45.8% of the area, according to data provided by the European Environment Agency. In order to extend the areas covered by forests, especially over badlands specific for the Transylvanian Basin and to increase the economic and environmental value of these lands, a GIS model of spatial analysis has been developed to identify the areas favourable for downy oak (Quercus pubescens) plantations, a forest species which has specific requirements in terms of adaptability conditions. The developed spatial analysis model is based on the unitary analysis of the climatic, soil and geomorphologic components, spatially materialized as raster format databases, and their integration according to spatial analysis equations in order to get a modelled database which represents spatially the favourable areas for the creation of downy oak plantations. The result of this study highlights the territories which provide favourable but also restrictive conditions for Quercus pubescens. The model has a high predictability rate taking as comparative reference the direct monitoring at the level of forest planning units (PUs) within Cluj County, identified from the analysis of forestry plans. The high validation rate of the proposed model was obtained by overlapping the favourability classes which themselves were obtained after modelling with the limits of the forest planning units where the consistency of the downy oak is greater than 0.7. According to the presented validation procedure, a 93% validation rate was obtained, fact which highlights the usefulness of applying the model in areas having similar features and its extrapolation in areas where the environmental conditions present only slight differences.
Arend M, Kuster T, Günthardt-Goerg MS, Dobbertin M (2011). Provenance-specific growth responses to drought and air warming in three European oak species (Quercus robur, Q. petraea and Q. pubescens). Tree Physiology 31(3):287-297.
Bobiec A, Reif A, Öllerer K (2018). Seeing the oakscape beyond the forest: a landscape approach to the oak regeneration in Europe. Landscape Ecology 33(4):512-528.
Breda N, Huc R, Granier A, Dreyer E (2006). Temperate forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences. Annals of Forest Science 63(6):625-644.
Doniţă N, Chiriţă C, Roşu C (1981). Formaţiile forestiere şi condiţiile lor de viaţă. In: Pădurile României [Forest formations and their living conditions. In: Romanian Forests]. Romanian Academy Press, Romania, Bucharest.
Ducousso A, Bordacs S (2003). EUFORGEN, technical guidelines for genetic conservation and use for pedunculated and sessile oaks (Quercus robur/Quercus petraea). Conference Rome, Bioversity pp 6.
Dumitru M, Dumitru S, Tănase V, Mocanu V, Manea A, Vrînceanu N, … Calciu I (2011). Monitoringul stării de calitate a solurilor din România [Monitoring of soil quality in Romania]. Craiova, SITECH Publishing.
Florență G (2015). Biological particularities of the Downy oak (Quercus pubescens Willd) in Moldova. PhD Thesis, Academy of Sciences of Moldova, Chişinău.
Furtună P (2017). Temporal and spatial variation of forest coverage in Apuseni Natural Park, 2000-2014 period. Geographia Technica 12(1):46-56.
Galiano L, Martínez-Vilalta J, Eugenio M, Granzow-De La Cerda I, Lloret F (2013). Seedling emergence and growth of Quercus spp. following severe drought effects on a Pinus sylvestris canopy. Journal of Vegetation Science 24:580-588.
Guettouche MS, Derias A (2013). Modelling of environment vulnerability to forests fires and assessment by GIS application on the forests of Djelfa (Algeria). Journal of Geographic Information System 5(1):24-32.
Lacaze B, Tarabant F, Rambal T (1996). Adaptation and local validation in a Mediterranean environment of a process-level ecosystem model driven by remotely sensed inputs. In: Remote sensing ’96 integrated applications for risk assessment and disaster prevention for the Mediterranean pp 299-304.
Loidi J, Herrera M (1990). The Quercus pubescens and Quercus faginea forests in the Basque Country (Spain): distribution and typology in relation to climatic factors. Vegetatio 90(1):81-92.
Mîndru M, Roșca S, Bilașco Șt, Păcurar I, Fodorean I, Vescan I, … Breje M (2018). The monitoring of greenery coverage levels according to the remote sensing indices in the the Mociar Forest. Geographia Napocensis XII(1):27-34.
Păcurar I, Bilaşco Ş, Cristina CM, Dirja M, Moldovan I, Păcurar H, Lucaci Al (2013). Research on identification of degraded land in Transylvanian Plateau using GIS spatial analysis. ProEnvironment 6(14):216-227.
Pasta S, de Rigo D, Caudullo G (2016). Quercus pubescens in Europe: distribution, habitat, usage and threats. In: European Atlas of Forest Tree Species pp 156-157.
Reif A, Xystrakis F, Gartner S, Sayer U (2017). Floristic change at the drought limit of European beech (Fagus sylvatica L.) to downy oak (Quercus pubescens) forest in the temperate climate of central Europe. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 45(2):646-654.
Rørstad P, Trømborg, E, Bergseng E, Solberg B (2010). Combining GIS and forest modelling in estimating regional supply of harvest residues in Norway. Silva Fennica 44(3):435-451.
Roșca S, Bilașco S, Păcurar I, Colniță D, Fodorean I, Vescan I, … Păcurar H (2017). Quantitative evaluation of forest favourability using GIS database in a hill area in the Transylvania Depression, Romania. Geomatics, Natural Hazards and Risk 8(2):1914-1934.
Roşca S, Simonca V, Bilasco S, Vescan I, Fodorean, I, Petrea D (2019). The assessment of favourability and spatio-temporal dynamics of Pinus mugo in the Romanian Carpathians using GIS technology and landsat images. Sustainability 11(13):3678.
Stănescu V (1979). Dendrologie [Dendrology]. Editura Didactică şi Pedagogică, București.
Wellstein C, Cianfaglione K (2012). Impact of extreme drought and warming on survival and growth characteristics of different provenances of juvenile Quercus pubescens willd. Folia Geobotanica 49(1):31-47.
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