On some alien species from Emilia-Romagna harbors (northern Adriatic Sea, Italy)

Increased global trade has led to a surge in the introduction of non-indigenous species (NIS) worldwide. Ships, particularly merchant vessels and recreational yachts, act as vectors for these invasions by transporting NIS in ballast water or as hull fouling. This study investigates the introduction of new fouling NIS in the North Adriatic Sea. Our field research at the ports of Ravenna and Cesenatico identified several alien species, including new records for the North Adriatic Sea: Polyandrocarpa zorritensis, Aplidium accarense and Celleporaria brunnea. Additionally, a significant presence of the cryptogenic species Molgula manhattensis was observed in Cesenatico.