The Kvarner fault divides the Microadria (Adria microplate, the Adria stable core) into the Po and Adria segments. The Istra block, which is sandwiched between the right-lateral Kvarner Fault and the ...left-lateral Sistiana Fault lies at the extreme eastern edge of the Po segment. Both faults run transversely to the Dinarides and reach their thrust boundary in the east. The Microadria has been moving towards the Dinarides since the Middle Miocene. The movement of the Istra block is exposed in relation to the neighbouring blocks, so an extensive pushed area (the Istra Pushed Area) was formed in the External Dinarides, which is bent towards the northeast. It is defined by two flexural zones, one lying in the extension of the Sistiana Fault and the other in the extension of the Kvarner Fault. The structure of the Dinaric thrust border on the north-eastern side of the Istra block is complex. Its prominent structural element is the Črni Kal Anomaly, due to which a zone of increased compression developed within the Istra Pushed Area and transversely to the Dinarides (Kraški rob – Hrušica Traverse), which lies between the Sistiana and Kvarner Flexural Zones. In terms of kinematics, it differs greatly from these two, and various geomorphologically responsive deformations have occurred within it. Mt. Vremščica (1027 m), which represents a transpressive anticline within the wider zone of the Raša Fault is the most prominent. In order to understand the genesis of the Classical Karst relief, it is important to know that the Mt. Vremščica ridge rose from the levelled karst surface.
In this study we assessed microhabitat and host plant preferences of
Aporia crataegi
(Linne 1758) larvae in the field. The study was conducted in the submediterranean part of Slovenia, at the edge of ...the limestone region Kraški rob, where this species is widespread. The larvae were most abundant on blackthorn (
Prunus spinosa
L.) and the common hawthorn (
Crataegus monogyna
Jacq.), and infrequent on the rosehip (
Rosa
sp.) and rock cherry (
Prunus mahaleb
L.). Smaller shrubs with greater exposure to sun appeared to be preferred and larvae constructed their nests on outer branches of plants. The thermophilic nature of larvae was evident by the low and sheltered position of the nests, although in
P. spinosa
, which is more thermophilic than
C. monogyna
, they were positioned somewhat higher. As the nests and larvae occur mostly on plants growing in warmer microhabitats, larvae that had overwintered can take advantage of the quicker development of buds and leaves in early spring. The rocky ground below and around the occupied plants was often covered with grass, suggesting the need for cooler and warmer microclimate during hot summers and cold winters with strong winds, respectively. Densities of larvae and nests were positively but non-significantly correlated to density of host plants; however, in later successional stages, where host plants are most abundant, open and sunny microhabitats that can provide opportunities for larvae to warm up are lacking. The revival of the traditional management practices with extensive grazing with late and only occasional mowing may slow down the overgrowing process, leaving spiny host plants abundant and in close proximity to the nectaring sources for the adults.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OBVAL, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Geologic section along the motorway from Kozina to Koper in totality exposed geologic structure of the border belt between Adriatic-Apulian foreland and Dinarides that was formed by subthrusting of ...Adriatic-Apulian foreland (Istria, Friuli) underneath External Dinarides (Kras, Čičarija). During this process within the subthrusting belt a geomorphologic step was formed at sites where limestone became overthrust on flyschbeds.Apartof this geomorphologic step became known in the last decade of 20st century as the Kraški rob (Karst edge). With respect to geologic and geomorphologic considerations the term Kra{ki rob (»Karst Edge«) as landscape term for cliffs above the valleys of the Osapska reka and upper Rižana rivers should be distinguished from term karst edge (kra{ki rob) as a general term which is a synonym for the geomorphologic step consisting of precipitous cliffs and steep carbonate slopes situated entirely between the mouth of the river Timava and Mt. Učka that form the border belt between the karstic plateaus of Kras and Čičarije from one side, and the flysch Istria with the Trieste flysch coastal zone on the otherside.
Several important geological structures in the western Slovenia were identifiedas active and their activity was quantified. Geologic interpretation is based on the analysis of repeated leveling line ...campaigns data along the Sečovlje–Bled polygon. Taking intoaccount the limitations of the method – only the vertical component of displacement is measured – the following structures were identified as active:a juvenile syncline between Strunjan and Koper, the Kras Imbricate Structure, the Diva~a fault, the Ra{a fault, the Southalpine Front and the Julian Alps thrust. Vertical movement rate is relative, calculated with respect to the benchmark in Sečovlje. The largest uplift rate difference between Sečovlje and Bled is 7 mm/a.Vertical Geodynamic Activity (VGA) is introduced as a link between geologic interpretation of geodetic measurements on one side and possible applications on the other as well as a mean of comparison between tectonically active regions.
Karst meadows belonging to the class Festuco-Brometea are regarded as species-rich habitats of national and European importance. Biodiversity in these areas is relatively high, but unlike most other ...semi-natural habitat types, it is highly influenced and facilitated by human activities. In the present study we document the presence and estimate abundance of butterfly species from three sampling plots in Kraki rob (SW Slovenia): two dry karst meadows and one pasture, which also includes an overgrown area. Over 16-day sampling occasions in May and June 2012, 63 species (including species complexes) were recorded. Nearly all of the species were recorded from dry karst meadows (60 ssp., 95%), while pasture (34 spp., 54%) and the overgrown site (28 spp., 44%) were less diverse. The abundance of butterflies was the lowest on the overgrown area. Although both grazing and overgrowth result in a decline in the number and abundance of species, we believe that traditional land use positively affects butterfly diversity, as it maintains open grasslands, a habitat that is preferred by most butterfly species to the later phases of succession. We therefore recommend the maintenance of a mosaic landscape structure, as it supports a wide range of butterfly fauna.
Krške livade razreda Festuco-Brometea su vrstama bogata staništa od nacionalne i europske važnosti. Bioraznolikost na tim područjima je relativno visoka, no u suprotnosti s nekim drugim poluprirodnim ...staništima, njihova bioraznolikost je pod velikim utjecajem ljudske aktivnosti. U ovom istraživanju smo zabilježili prisutnost i procijenili brojnost danjih leptira na tri uzorkovane plohe na Kraškom rubu (jugozapadna Slovenija): dvije krške livade i jednom pašnjaku koji je uključivao i zarasla područja. Tijekom 16-dnevnog terenskog istraživanja u svibnju i lipnju 2012., zabilježili smo 63 vrste leptira (uključujući i komplekse vrsta). Gotovo sve vrste su bile zabilježene na suhim krškim livadama (60 vrsta, 95%), dok je na pašnjaku (34 vrste, 54%) i na zaraslom području (28 vrsta, 44%) raznolikost bila manja. Brojnost leptira je bila najmanja na zaraslim površinama. Iako i zaraštanje i ispaša imaju za posljedicu opadanje u broju vrsta i brojnosti, smatramo da tradicionalno korištenje zemlje pozitivno utječe na raznolikost leptira. Razlog za to je prije svega sprječavanje zaraštanja livada, koje leptiri preferiraju više od staništa u kasnijim fazama sukcesije. Zato predlažemo održavanje mozaične strukture krajolika, jer će na taj način on biti primjeren za veći broj vrsta leptira.
Basic objective of this article is to find out whether the rock block on which the castle of Crni kal is situated sticked once to the Kraški rob wall. The result is given on the basis of comparison ...of forms of both presumed contact surfaces represented by a great number of points determined in space. This cloud of points has been captured by 3D terrestrial laser scanning. On the basis of assessment of geological and morphological characteristics of the Crni kal rock block and the Kraški rob wall 12 characteristic pairs of corresponding (matching) points were collected, one pair consisting of two points, each from its own wall. By use of a method called 12-parameter affine transformation, transformation parameters of one cloud transformation into the other one were calculated. Since for such a transformation 4 pairs of points are enough, and there were even 12 pairs of points used in order to provide better results, the socalled least square method (LSM) was used. By the so obtained transformation vector the reference point cloud of the Crni kal rock block was transformed, for a size of the vector move back, into a cloud of transformed points which should match the reference point cloud of the Kraški rob wall. The comparison of a reference point cloud of Kraški rob and a cloud of transformed points showed that the rock block of Crni kal slid in a S-SW direction for 4.7 m in form of a block failure. Static analysis of matching point clouds proved that as much as 95 % of points fell within a distance less than 0.74 m which confirmed the hypothesis that the rock block on which the castle of Crni kal was situated represented once a part of the Kraški rob wall. Prior to the 11th century at least, it split away from it and moved parallel to the wall in form of a block failure.
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