DIGITALNA ARHIVA ŠUMARSKOG LISTA
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the vegetation of olive groves and stony pastures and in the halophilic vegetation along the sea coast. Due to the depopulation of the island’s inhabitants, the grasslands and olive groves are overgrown with macchia, and the habitats along the sea coast are threatened by embankment of the coast, construction of beaches, pressure from swimmers in the summer and pollution. In the sea along and around the island of Rivanj, habitats with species of Cymodocea nodosa and Posidonia oceanica are threatened. In the Lokvina bay (Gauss-Krüger coordinates: x=5504660 y=4889220) a vegetation with the Cymodocea nodosa was recorded. They belong to an endangered and rare habitat type (Natura code 1110) that requires special conservation measures (Anonymous 2006). Another marine flowering plant with a larger number of sites and a larger area is Posidonia, which forms the vegetation of the alliance (Posidonion oceanicae Braun-Blanquet, Roussine & Nègre 1952) an endangered and priority habitat of EU interest. The authors of the paper note a priority habitat of EU interest for the island of Rivanj that is not registered in the lists (Anonymous 2013a, 2014, 2019). In the area of Lokvina (Gauss-Krüger coordinates: x=5504600 y=4889245, Natura code 3170) there are Mediterranean temporary ponds. Water is retained in the pond for most of the year. That pond is one of the rare habitats in the wider area with potable water for numerous organisms, which is not negligible. In the flora of Rivanj there are 13 (3.76% of the total flora) strictly protected taxa. Important species for the inhabitants of the island of Rivanj, in addition to the endangered and strictly protected species, are those that can cause them problems on arable land (by number of individuals, allergenicity, rapid growth, poisonous seeds and fruits...). When introducing alien species into cultivation (gardens, flower beds, homesteads, parks), species that spread independently without human influence should be avoided. Such species can have a negative impact on local flora and vegetation. Some of the cultivated species were found on the island of Rivanj in weed and ruderal vegetation as escapees from culture in gardens, flower beds, along the road, in cracks in the walls. These species are: Eschscholzia californica, Dimorphotheca jucunda, *Alstroemeria ligtu, Mesembryanthemum cordifolium, *Catharanthus roseus, Melia azedarach, Mirabilis jalapa, etc. From the list of invasive taxa in Croatia (Nikolić et al. 2014a), 11 taxa were recorded in the flora of Rivanj. They occur in weed and ruderal vegetation around the settlement and none of them currently pose a threat to native species and habitats. It is important to pay attention to them because they spread quickly in new habitats, suppressing native species. VEGETATION RESULTS AND DISCUSSION – REZULTATI I RASPRAVA Through the syntaxonomic analysis, five clearly distinctive forest associations (see Tables 5–7 and Fig. 3). Syntaxomonic review of the studied vegetation QUERCETEA ILICIS Br.-Bl. ex A. & O. Bolos 1950 • Pistacio lentisci-Rhamnetalia alaterni Rivas-Martínez 1975 + Oleo sylvestris-Ceratonion siliquae Br.-Bl. ex Guinochet et Drouineau 1994 Ass: Erico arboreae-Arbutetum unedonis Allier et Lacoste 1980 ex Foggi in Foggi et Grigioni 1999 Ass: Myrto communis-Pistacietum lentisci (Molinier 1954) Rivas-Martínez 1975 Ass: Pistacio lentisci-Juniperetum turbinatae Trinajstić 1987 ex Asensi, Díez-Garretas & Quézel 2007 [NATURA 2000 habitat code 5210] • Quercetalia ilicis Br.-Bl. ex Molinier 1934 + Fraxino orni-Quercion ilicis Biondi, Casavecchia & Gigante in Biondi et al. 2013 Ass: Myrto communis-Quercetum ilicis (Horvatić 1963) Trinajstić (1976) 1985 [NATURA 2000 habitat code 9340] |