ISSN: 0001-5113 ACTA ADRIAT., ORIGINAL SCIENTIFIC PAPER AADRAY 56(1): 27 - 46, 2015 Late spring characterization of different coastal areas of the Adriatic Sea Mauro MARINI1*, Alessandra CAMPANELLI1, Mitat SANXHAKU2, Zoran KLJAJIĆ3, Mattia BETTI1 and Federica GRILLI1 1 Institute of Marine Science-CNR, Largo Fiera della Pesca, 2, Ancona, Italy 2 Institute of Geosciences, Energy, Water and Environment, Tirana, Albania 3Institute of Marine Biology Kotor, Montenegro *Corresponding author, e -mail:
[email protected]. The objective of this study is to analyze the physical and chemical characteristics of three coastal zones of the Adriatic Sea during late spring, and to identify similarities and differences among the zones. The trophic status of the Southeastern Adriatic-Sea, dominated by the discharge from the Buna/Bojana river delta watersheds, is compared with two other Adriatic regions: the Northwestern Adriatic Sea and the Southwestern Adriatic Sea (Gulf of Manfredonia); the first is dominated by the Po River freshwater discharge and the second is one of the most productive areas of the Southwestern Adriatic. The areas are influenced by two main Adriatic surface currents: the Eastern Adriatic Current (EAC) that flows north-westward, and the Western Adriatic Current (WAC) that flows south-eastward. The measurements of temperature, salinity, fluorescence, oxygen, nutrients and chlorophyll a in the three areas were collected and compared. The areas showed similar physical and bio-chemical characteristics, despite the Northern Adriatic is impacted by the Po River runoff and the WAC carries out along the Western Adriatic water rich of nutrients from the northern Italian rivers. The area affected by the Po River discharge showed maximum chlorophyll and nitrogen concentrations within the river plume.