RT Journal Article T1 Between Claudius and Trajan: Palaeoenvironmental Evolution of the Imperial Port of Portus (Central Italy) A1 Ruiz Muñoz, Francisco A1 Gómez Álvarez, Gabriel A1 Bermejo Meléndez, Javier A1 González-Regalado Montero, María Luz A1 Ríos Salgado, Sergio A1 López Sánchez, Amanda A1 Cano Pérez, Alejandro A1 Fernández Sutilo, Lucía A1 Toscano Grande, Antonio A1 Gómez Gutiérrez, Paula A1 Romero Aguilar, Verónica AB The port of Portus was located about 30 km southwest of Rome and was the most important in theWestern Mediterranean during the Roman Imperial period (27 BCE–476 CE). This paper analyses the palaeoenvironmental evolution of the channel linking the outer harbour, or Claudius Basin, with the inner harbour, or Trajan’s Hexagon. During the 1st century CE, this area was situated in an open marine environment, which gradually became more confined due to sedimentation from the River Tiber and the silting caused by the massive accumulation of fibres and leaves from the seagrass Posidonia oceanica. In the ~2nd–5th centuries CE, the area transitioned to a brackish environment and eventually became silted up, with a marked decline in port activity from the 5th century CE onward. PB MDPI SN 2571-550X (electrónico) YR 2026 FD 2026 LK https://hdl.handle.net/10272/28684 UL https://hdl.handle.net/10272/28684 LA eng NO Ruiz, F., Gómez, G., Bermejo, J., Monge, G., Carretero, M. I., González-Regalado, M. L., Ríos, S., López, A., Cano, A., Fernández, L., Abad, M., Izquierdo, T., Toscano, A., Gómez, P., Bernabé, J. M., & Romero, V. (2026). Between Claudius and Trajan: Palaeoenvironmental Evolution of the Imperial Port of Portus (Central Italy). Quaternary, 9(3), 47. https://doi.org/10.3390/quat9030047 NO This study was supported by the following projects: (1) Proyecto del Plan Operativo FEDER 2021-2027 Arqueología y Virtualización: nuevas técnicas de teledetección y digitalización aplicadas al patrimonio arqueológico (ARQUEOVIRT) Ref. EPIT1622023; Mors et funus ostiense: ritual, arquitectura y topografía portuaria en Ostia Antica y Portus del periodo altoimperial a la tardoantigüedad Proyectos Arqueológicos en el Exterior Ministerio de Cultura; (2) project FEDER 2014-2020 UHU-1260298, and (3) project “El arco atlántico del sudoeste hispano desde la protohistoria hasta la Tardoantiguedad: Evolución geomorfológica, ocupación litoral y sistemas portuarios” (Ref. PID2022-142778NB-I00) Proyectos Generación del conocimiento convocatoria 2022. Other funds come from the research groups HUM-132, RNM-238 and RNM-293 of the University of Huelva and RNM-349 of the University of Sevilla. It is a contribution to the Center for Research in Historical, Cultural and Natural Heritage of the University of Huelva. The paleontological record is deposited in the Paleontology and Applied Ecology Laboratory of the University of Huelva. DS Repositorio Institucional de la Universidad de Huelva RD 13 jul 2026