RT Journal Article T1 Posidonia oceanica (L.) Delile at ItsWesternmost Biogeographical Limit (Northwestern Alboran Sea): Meadow Features and Plant Phenology A1 Mateo-Ramírez, Ángel A1 Marina, Pablo A1 Martín-Arjona, Alejandro A1 Bañares-España, Elena A1 García-Raso, José Enrique A1 Rueda, José L. A1 Urra, Javier K1 Biología marina K1 Botánica - Investigación AB Meadows of the seagrass Posidonia oceanica inhabit most infralittoral bottoms of the MediterraneanSea and are considered one of the main climax stages of the infralittoral environment. Thisseagrass has its western distributional limit along the coast of the Alboran Sea. Taking into accountthe decline of P. oceanica meadows and the global scenario of ocean warming, it becomes essential toknow the structure, temporal dynamics, sexual reproduction and conservation status of this seagrass,across its geographical distribution, including the distribution boundaries where the meadows withstandlimiting environmental conditions. In the present work, we studied the structure, phenologyand flowering events of four P. oceanica meadows located in the northwestern Alboran Sea (closeto the Strait of Gibraltar). Results indicate a decreasing trend of patch size, bathymetric range andnumber of leaves per shoot towards the Strait (and the Atlantic Ocean), as well as an increasingtrend of shoot density and leaf height. Phenological parameters of the northwestern Alboran SeaP. oceanica meadows presented temporal dynamics similar to meadows from other locations withinthe biogeographical distribution of this seagrass, with similar or even less annual variability in theformer. Although most of the studied P. oceanica meadows seem to present a good health status (BiPoindex ~0.6) with high shoot densities and some flowering events, some of them showed evidenceof regression. PB MDPI YR 2023 FD 2023-01-09 LK https://hdl.handle.net/10630/36550 UL https://hdl.handle.net/10630/36550 LA eng NO Mateo-Ramírez, Á.; Marina, P.; Martín-Arjona, A.; Bañares-España, E.; García Raso, J.E.; Rueda, J.L.; Urra, J. Posidonia oceanica (L.) Delile at Its Westernmost Biogeographical Limit (Northwestern Alboran Sea): Meadow Features and Plant Phenology. Oceans 2023, 4, 27–48. https://doi.org/10.3390/ oceans4010003 NO Partial funding for open access charge: Universidad de Málaga DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 22 ene 2026