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Val Rosandra

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Val Rosandra is a valley centered on the river with the same name in the municipality of Dolina in the Italian region of Friuli Venezia Giulia, between the city of Trieste and the border with Slovenia. It is also included into a natural park, mostly set around the river Rosandra and the surrounding hills reach an elevation of 412 metres . The northern end of the valley crosses the Italian-Slovenian border. The Val Rosandra is part of the Karst geographical region. Tourist attractions in the valley are a 40-metre waterfall near the village of Botazzo and the Church of Santa Maria .
The hitherto known plant diversity of Val Rosandra can be summed up in just a few numbers: more than 1,000 fungi, 988 vascular plants, approx. 300 lichens, about 150 bryophytes , and about 100 species of Myxomicetes, for a total of approximately 2,700 infrageneric taxa. There is a lack of reliable data on cyanobacteria, algae and microfungi, with which the total number of taxa would be much higher. The Val Rosandra reflects the history of the vegetation of the karst, but it has many original features. The geomorphology makes it a "unicum" in the Trieste Karst: agriculture was and is limited to small areas of Flysch such as near Botazzo, grazing is today almost completely abandoned and even in the past it was made difficult by the steep and stony slopes. The valley still retains aspects of the prehistoric vegetation of the karst, especially on rocks and scree slopes. The landscape is different from that of the rest of the Trieste Karst. The climbers who use the rock walls as a school have wrongly compared it to an "alpine" landscape, whereas it rather recalls the great valleys of Dinaric Dalmatia, with the major forms of erosion and the alternation of shrubs and almost bare surfaces; also the geologic structures are similar, with fissured limestone, scree, etc., the species are often the same and grow in similar associations. Thus, certain sections of M. Carso are extraordinarily reminiscent of the hinterland of Rijeka in Croazia. In Val Rosandra the relationships between vegetation and physical factors are clearer than in the Alps, where the complicated orography and the presence of many types of rocks create a complex pattern of ecosystems. In Val Rosandra the landscape can be read easily, because of the modest development of the reliefs and presence of only two dominant types of substrate: limestone and Flysch. The areas with Flysch have an almost "Apenninic", landscape, while those with limestone give rise to a "Balkan" landscape.

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Trieste
Italy

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