20.500.12556/DiRROS-27945 Review of Eastern Adriatic hydromedusae: unravelling two centuries of records The Eastern Adriatic Sea is biogeographically complex, yet knowledge of its hydromedusae is fragmented across two centuries of uneven sampling and shifting taxonomy. This review integrates historical faunistic records (pre-1950), mid-century programmes (1950–2000), modern quantitative time series (post-2000), and citizen science observations to compile an updated checklist of 98 non-siphonophoran hydrozoan taxa. Records are synthesised across eight sub-regions, although the most continuous research has focused on the Northern Adriatic and the open South Adriatic. The clearest long-term signal is in the Northern Adriatic, where diversity collapsed by >60% from the 1960s to the 1980s, largely through the loss of meroplanktonic taxa with benthic polyp stages under eutrophication-driven hypoxia. Since 2000, oligotrophication coincides with a partial recovery, marked by the re-emergence of meroplankton and episodic intrusions of oceanic holoplankton (including Trachymedusae) linked to circulation regimes (BiOS). For the open South Adriatic, bathymetric distributions and diel vertical migration patterns are synthesised to characterise a persistent offshore core. Taxonomic updates and information on non-indigenous and bloom-forming taxa are provided. Methodological biases and gaps, especially polyp-stage ecology and spatial sampling voids, are highlighted, and routine DNA barcoding is recommended. The checklist provides a baseline for tracking change in a shifting ecosystem. gelatinous zooplankton ecological collapse and recovery citizen science meroplankton taxonomic checklist želatinasti plankton trdoživnjaške meduze pregled pojavljanja taksonomska lista true false true Angleški jezik Slovenski jezik Neznano 2026-03-02 06:09:09 2026-03-02 06:09:09 2026-03-03 03:52:35 0000-00-00 00:00:00 2026 0 0 Soavtorji: Davor Lučić, Alenka Malej, Barbara Gangai Zovko; Nasl. z nasl. zaslona; Opis vira z dne 5. 2. 2026; str. 1-33 no. 3, [article no.] 288 Vol. 14 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-02-01 574.5 2077-1312 10.3390/jmse14030288 267400963 https://www.mdpi.com/2077-1312/14/3/288 1 f473b4d6-15f5-11f1-8c73-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=41161 RAZ_Onofri_Ivona_2026.pdf RAZ_Onofri_Ivona_2026.pdf 1 6074B8DC119607A14A1DEDCF042E28A4 f867e04ea41c00df6ec67a9665c8e46a5ffcdf731ad736dfac6a4b9f4b91ad20 22545372-15f6-11f1-8c73-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=41162 Nacionalni inštitut za biologijo 0 0 0