DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/2023 str. 10 <-- 10 --> PDF |
INTRODUCTION UVOD Preliminary analyses show that the islands of the Adriatic archipelago stand out as one of the main centres of floristic diversity in Croatia (Nikolić et al. 2008, Nikolić 2014b). The islands of the Zadar archipelago are floristically the least explored. There are 23 islands, 177 islets and 65 rocks and reefs in the Zadar archipelago - a total of 265 (Anonymous 2007). Although intensive floristic research on the islands of the Zadar archipelago has been carried out for the last 15 years, the flora of the larger islands: Premuda, Sestrunj, Zverinac, Škrda, Maun, Iž, Rivanj, Ugljan and Pašman, is still insufficiently researched or almost unknown. In the last 10 years, Perinčić et al. (2016) studied the horticultural flora of the islands of the Zadar archipelago, including Rivanj. They recorded 21 taxa for Rivanj. The most exstensive years-long phytosociological investigations of the littoral vegetation were conducted in the second half of 20th century by Horvatić (1961–1962, 1963). He investigated the vegetation of garrigues and rocky grassland on the islands of Kornati, Dugi otok, Korčula, Hvar, Brač, Šolta, Vis, the Zadar archipelago and others. On several occasions in 1958, 1959 and 1960, while investigating the vegetation of garrigue, Horvatić visited the islands of Ugljan, Pašman, Rivanj and Sestrunj of the Zadar archipelago, as well as the eastern parts of the islands of Korčula and Badija. Horvatić presented the floristic composition of the investigated garrigue in Table 1 in 8 relevés. Relevés 1, 3 and 5 were produced on the island of Rivanj where Horvatić identified 24 taxa. At the time of Horvatić’s investigations, 79 people lived on the island of Rivanj (Faričić 2012). The depopulation process reduced farming activities and vineyards and olive groves became overgrown by macchia. The absence of cutting, mowing, grazing and fires has contributed to the successional processes and development of forest vegetation. In recent past, there were three fires on the island of Rivanj. The last one happened on July 25, 2007 when a third of the islands vegetation was destroyed (Radulić 2010). Floristic and vegetation investigations of the island of Rivanj and the islet of Sestrica Mala started in 2019 (Pandža et al. 2019). The aim of the investigations is to complete data regarding vegetation characteristics on the island of Rivanj and the Sestrice islets and to propose conservation measures for the endangered habitat types. Research area – Područje istraživanja The island of Rivanj (3,615 km2; Duplančić-Leder et al. 2004) is located in the Zadar archipelago and is located between the islands of Sestrunj and Ugljan (Fig. 1). It has a Dinaric northwest-southeast direction. It is 3.4 km long, and the greatest width is 1.4 km. Its coastline is 10.3 km |