Pregled bibliografske jedinice broj: 427251
Mapping of the Posidonia oceanica meadows along the coast of the Fulija Islet (Eastern Adriatic Sea)
Mapping of the Posidonia oceanica meadows along the coast of the Fulija Islet (Eastern Adriatic Sea) // Proceedings of the Mediterranean Seagrass workshop 09 / Di Carlo, G. ; Calladine, A. ; Žuljević, A. (ur.).
Hvar, 2009. str. 50-51 (poster, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Mapping of the Posidonia oceanica meadows along the coast of the Fulija Islet (Eastern Adriatic Sea)
Autori
Kružić, Petar ; Lonić, Vencislav
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Proceedings of the Mediterranean Seagrass workshop 09
/ Di Carlo, G. ; Calladine, A. ; Žuljević, A. - Hvar, 2009, 50-51
Skup
Mediterranean Seagrass workshop 09
Mjesto i datum
Hvar, Hrvatska, 06.09.2009. - 10.09.2009
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Posidonia oceanica; Fulija Islet; Adriatic Sea
Sažetak
Biocoenosis of Posidonia oceanica meadows is the most valuable settlement in biological and economical sense for ecosystem of Mediterranean Sea. Intensive influence of human activities has negative impact on evolution and survival of this sensitive community. In last 40 years due to higher sea pollution and intense trawling, areas covered by this biocoenosis have been reduced for more than 30%. A large scale map of the P. oceanica seagrass beds was compiled along the coast of the Fulija Islet (Eastern Adriatic Sea) in the vicinity of tuna farm cages. An extensive diving survey using the GPS tracking system and the interpretation of aerial colour photographs were used. Patches of dead “ matte” were observed at a depth of between 8 and 22 meters, as a result of influence of tuna cages. The largest beds around the Islet are characterized by gentle slopes and sandy bottoms. There, the beds showed uniform cover while a patchy structure was common on the rocky and steep bottoms. The combination of the three methods of mapping (diving, GPS tracking and aerial photographs) seems to be quite suitable for an accurate and low-cost monitoring of the P. oceanica meadows. The combined use of image processing of aerial photographs for the shallower layers (0-15 or 20 meters and of GPS tracking for the deeper depths (20-30 m) is a particularly suitable approach. The methods adopted allowed accurate maps at a scale of 1:10 000.
Izvorni jezik
Engleski
Znanstvena područja
Biologija
