Many ascidian (sea squirt) species are common members of fouling communities, particularly on floating substrates such as docks and pilings and through maritime transport, have been introduced worldwide. For the past 30 years, marinas in Southern California have been regularly monitored for introduced species due to their proximity to the international shipping terminals in Los Angeles and Long Beach Harbors. Here, we report on the first record in the eastern Pacific of an ascidian in the family Corellidae (O. Phlebobranchia), Corella japonica, found at the Newmarks Yacht Centre in Los Angeles Harbor. This study further highlights the importance of continuously monitoring harbors and marinas to detect the early arrival of new non-native species.

Crossing literary evidence with archaeological data, we discuss the history of a site known as ‘Marsa Djazira’ by following the evolution of its toponym. During the Phoenician-Punic era, this site was described as a city/urban establishment with a harbour known as ‘Gaphara’. In late Roman times its name was most likely changed to ‘Minna Villa Marsi’, as the Marsi family of the aristocracy of Leptis Magna probably built a luxury residence (villa) and exploited the port to export olive products from its estates in the hinterland of Leptis Magna. In the Middle Ages, the site underwent another toponymic change to ‘Ras Chacra’ and became an official maritime station (port) on the shipping lanes. In the late Middle Ages, the ancient toponym ‘Gaphara’ reappeared again with a slight distortion as ‘Gasr Jafara/Djefara’. This last name was known when the site was already ruined and abandoned.

Ras Ibn Hani peninsula, a wave-dominated tombolo (800 × 1000 m) on the Syrian coast, provides evidence for significant Holocene changes that can be linked to geological inheritance, rising post-glacial sea level, sediment supply and human impacts. Initial development of Ras Ibn Hani's coastal system began ~ 8000 years ago when shallow marine environments formed in a context of rising post-glacial sea level. Following relative sea-level stabilization ~ 6000 cal yr BP, beach facies trace the gradual formation of a wave-dominated sandbank fronted by a ~ 2300 × ~ 500 m palaeo-island whose environmental potentiality was attractive to Bronze Age societies. A particularly rapid phase of tombolo accretion is observed after ~ 3500 cal yr BP characterised by a two- to fourfold increase in sedimentation rates. This is consistent with (i) a pulse in sediment supply probably driven by Bronze Age/Iron Age soil erosion in local catchments, and (ii) positive feedback mechanisms linked to regionally attested neotectonics. Archaeological remains and radiocarbon datings confirm that the subaerial tombolo was probably in place by the Late Bronze Age. These data fit tightly with other eastern Mediterranean tombolo systems suggesting that there is a great deal of predictability to their geology and stratigraphy at the regional scale.