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ŠUMARSKI LIST 1-2/2019 str. 38     <-- 38 -->        PDF

concerning the type of the development process, which include dissolution (corrosion), collapse, suffusion or subsidence (Williams, 2004). However, their genesis often includes more than just one process, thus the majority of the dolines have polygenetic origin, even though one process is always dominant (Ford and Williams, 2007).
This study aimed to identify the habitat conditions in different parts of the Sovljak doline, situated on the Mt. Velika Kapela. Also, the aim was to investigate its microclimate, in order to detect a potential temperature inversion, which may, if intense and frequent enough, cause the occurrence of vegetation inversion. Similar investigations were made by Lausi (1964) and Favretto and Poldini (1985) in Italy, Bátori et al. (2009, 2011, 2012, 2016) and Bárány-Kevei (2011) in Hungary, Özkan et al. (2010) in Turkey, Antonić et al. (1997), Vrbek et al. (2010), Buzjak et al. (2011) and Surina (2014) in Croatia.
The Sovljak doline was chosen as an interesting site, since it stands out by its funnel shaped morphology and large dimensions. It is situated on the eastern slope of the Mt. Velika Kapela, 8.5 km SSW from the town of Ogulin, between the regions of Ogulinsko-plaščanska udolina valley on the east and the Gorski kotar on the west (Fig. 1).
The researched karst area is mostly covered by thermophilic beech forest (ass. Ostryo-Fagetum M. Wraber ex Trinajstić 1972). Considering the Köppen-Geiger climate classification, this area belongs to the moderately warm climate type with warm summer (Cfb), with mean July temperature between 20 and 22 °C and mean January temperature between 0 and -3 °C. The precipitation is equally distributed during the year, with the lack of a dry period (Kottek et al., 2006; Šegota and Filipčić, 1996).
Basic geological conditions of the doline’s geomorphological evolution – Osnovni geološki uvjeti geomorfološkog oblikovanja ponikve
The Upper Jurassic carbonate rocks (Malm series) dominate the research area, with two members which can be distinguished. Their characteristics determined by geological conditions and geomorphological processes are contributing to internal biotope conditions. The 2J3 member is represented