20.500.12556/DiRROS-19404 Multi-platform study of the extreme bloom of the barrel jellyfish Rhizostoma pulmo (Cnidaria: Scyphozoa) in the northernmost gulf of the Mediterranean Sea (Gulf of Trieste) in April 2021 On 7 April 2021, an exceptional bloom of the scyphomedusa Rhizostoma pulmo was observed in the Gulf of Trieste (Italy). Blooms of this species in the northern Adriatic Sea have been reported since the late 1800s: the density of jellyfish observed in 2021 reached more than 10 specimens per square metre. We analyse the bloom from a multi-platform approach using observations and model data at different timescales. We attempt to explain the intensity of the bloom as a consequence of thermohaline and hydrodynamical conditions in the gulf. Meteo-oceanographic conditions that may have contributed to the exceptional aggregation of jellyfish observed along the northernmost coast of the Adriatic Sea are discussed in detail. Specifically, our results indicate that this bloom was enabled by (1) the presence of a high number of jellyfish in the gulf, probably linked to the anomalously warm sea conditions in spring 2020 and winter 2021, which may have favoured a longer reproductive period and enhanced survival of adult R. pulmo, respectively; and (2) strong wind events, such as the bora wind for the Gulf of Trieste, which enhanced upwelling and mixing processes in the gulf, bringing the jellyfish from the deeper waters to the surface and clustering them along the coast. jellyfishes Gulf of Trieste Mediterranean Sea hydrobiology marine biology meduze Tržaški zaliv Sredozemsko morje hidrobiologija morska biologija true false true Angleški jezik Slovenski jezik Neznano 2024-07-17 03:57:17 2024-07-18 13:53:52 2024-07-19 03:45:50 0000-00-00 00:00:00 2022 0 0 Ostali avtorji: Valentina Tirelli, Laura Ursella, Matjaž Ličer, Massimo Celio, and Vanessa Cardin; str. 1321-1337 iss. 5 Vol. 18 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-09-13 574 1812-0784 10.5194/os-18-1321-2022 134311171 https://doi.org/10.5194/os-18-1321-2022 1 213c6462-43cf-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26768 RAZ_Reyes_Suarez_Nydia_Catalina_2022.pdf RAZ_Reyes_Suarez_Nydia_Catalina_2022.pdf 1 4372CB4C2AF6C8212B0DBFA08D224407 54a4cb31f165fb3f890ee89d11ae6818dfbad6de89049c3bab8e2e11410f9af0 6e375178-44ec-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26909 Nacionalni inštitut za biologijo 0 0 0