1. Cestum veneris Lesueur, 1813 (Ctenophora) : a Rare Guest in the Northern Adriatic SeaManja Rogelja, Martin Vodopivec, Alenka Malej, 2022, izvirni znanstveni članek Povzetek: We report the occurrence of the ctenophore Cestum veneris Lesueur, 1813 in the Gulf of Trieste (northern Adriatic Sea). Three individuals were found in March 2022, representing the first documented record in the scientific literature in more than 130 years. They were observed and photographed in the sea, and two specimens were brought to the Piran Aquarium, where their behaviour was observed. Historical and recent literature on the occurrence of this species in the Adriatic Sea was reviewed. The occurrence in the Gulf of Trieste is likely related to the transport of C. veneris with the currents, and therefore we present simulation results for the period January-February. Despite the relatively rare detections near the coast, this species is probably widespread in the offshore waters of the central and southern Adriatic.
Ključne besede: winter gelatinous plankton, Ctenophora, distribution, Gulf of Trieste
Objavljeno v DiRROS: 31.07.2026; Ogledov: 154; Prenosov: 95
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2. Priprava predloga metodologije in navodil za presojo vpliva posega na stanje morskih voda : poročilo o izvedenem delu, Razvoj koncepta metodologije za presojo vplivov različnih posegov na stanje morskih vodaKatja Klančnik Židan, Vesna Flander-Putrle, Barbara Debeljak, Helena Caserman, Branko Čermelj, Martina Orlando-Bonaca, Janja Francé, Andreja Ramšak, Martin Vodopivec, Domen Trkov, končno poročilo o rezultatih raziskav Ključne besede: upravljanje z vodami, biološki elementi kakovosti, stanje, morje, predpisi
Objavljeno v DiRROS: 10.07.2026; Ogledov: 183; Prenosov: 0
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3. Long-Term Study of Zooplankton Biomass in the South-Eastern Part of the Gulf of Trieste (Adriatic Sea)Jan Malej, Tjaša Kogovšek, Martin Vodopivec, Janja Francé, Patricija Mozetič, Matevž Malej, Alenka Malej, 2025, izvirni znanstveni članek Povzetek: We present a dataset of zooplankton biomass spanning more than four decades (1974–2019). The dry mass of zooplankton ranged from below 10 to almost 100 mg m-3, was highest in 1989–2002 and declined thereafter. The interannual variability of zooplankton dry mass in the period 1993–2018 was compared with the regional atmospheric index WeMOi, chlorophyll a and frequency of jellyfish blooms. Increased dry mass values were associated with a positive phase of the regional atmospheric index WeMOi, higher chlorophyll a and a lower frequency of jellyfish blooms.
Ključne besede: net zooplankton, dry mass, time series, chlorophyll a, jellyfish blooms
Objavljeno v DiRROS: 24.06.2026; Ogledov: 217; Prenosov: 157
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4. The deep Adriatic transient dataset : version v1Elena Terzić, Vanessa Cardin, Julien Le Meur, Natalija Dunić, Martin Vodopivec, Ivica Vilibić, 2024, zaključena znanstvena zbirka raziskovalnih podatkov Povzetek: Potential temperature and practical salinity data in the deep Southern Adriatic Pit from: the E2M3A deep-ocean observatory at 1000 and 1200 m since 2006 (managed by the National Institute of Oceanography and Applied Geophysics (OGS), Trieste, Italy) the D1200 station (CTD data) since 1957 at 1000 m (managed by the Institute of Oceanography and Fisheries (IOF), Split, Croatia) CTD data from opportunistic cruises since 1985 (managed by OGS) at 1000 m Daily temperature, salinity and potential density anomaly data from the Vida buoy in the Gulf of Trieste (Piran) since 2004 (managed by the Marine Biology Station, Piran, Slovenia)
Ključne besede: Adriatic Sea, dense water, global warming, Gulf of Trieste
Objavljeno v DiRROS: 08.05.2026; Ogledov: 295; Prenosov: 410
 Raziskovalni podatki (12,48 MB)
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6. Dynamic sinking and surface-area based decay modeling reduce estimates of gelatinous zooplankton-mediated carbon export to the Deep SeaČrtomir Perharič, Martin Vodopivec, Gerhard J. Herndl, Matjaž Ličer, 2026, izvirni znanstveni članek Povzetek: Gelatinous zooplankton (GZ) have been proposed as a potentially important but largely overlooked contributor to the biological carbon pump. However, estimates of GZ-derived carbon transfer efficiency to the ocean floor reflect uncertainties in key parameters that govern carbon export, leading to contrasting interpretations of the role of GZ in the biological carbon pump. This study addresses key simplifications in previous models, that is, constant sinking speed and mass-depending decay, by introducing (a) vertical sinking dynamically coupled to GZ biomass loss due to microbial decay and (b) a novel surface-area-dependent formulation of GZ biomass degradation. Under these new assumptions, global GZ carbon exports and transfer efficiencies are recomputed, capturing processes not considered in earlier models. While global GZ export from the euphotic zone remains similar to previous estimates , accounting for of the total global particulate organic carbon (POC) export, introducing a sinking speed coupled to GZ biomass reduces GZ POC export to the seafloor by (to ). Adding the surface-area based decay reduces export to the seafloor by (to ). These results indicate that while GZ remains a major contributor to carbon export from the euphotic zone, earlier models overestimated GZ contribution to deep-ocean carbon sequestration. Our modeling assumptions are generic and transferable to other types of sinking and decaying particles and can be leveraged to improve estimates of POC export, thus advancing the understanding of the mechanical aspects of the biological carbon pump.
Objavljeno v DiRROS: 25.03.2026; Ogledov: 359; Prenosov: 300
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7. Unprecedented warming and salinization observed in the deep AdriaticElena Terzić, Vanessa Cardin, Julien Le Meur, Natalija Dunić, Martin Vodopivec, Ivica Vilibić, 2025, izvirni znanstveni članek Povzetek: The deep Southern Adriatic is a Mediterranean region highly sensitive to climate change, influenced by dense water cas-cading from the northern Adriatic and heat/salt transport from the Eastern Mediterranean. Historical (since 1957) andmodern (permanent and opportunistic temperature and salinity sampling, Argo floats, fixed moorings) measurementsreveal a substantial change since the mid-2000s in thermohaline properties. Historically marked by steady increases intemperature, salinity, and density, with substantial saw-tooth decadal variability, the near-bottom Southern Adriatic hasexperienced unprecedented warming (0.8C) and salinization (0.2) over the past decade, accelerating in time and revers-ing density trends. The inflow of much more saline waters reduced stratification and altered dense water properties atits source in the northern Adriatic. This at least fivefold acceleration of the high-emission regional climate projectionsmay have substantial effects on the Adriatic biogeochemistry and living organisms, changing sea level trends and more.
Ključne besede: Adriatic Sea, dense water, global warming, Gulf of Trieste
Objavljeno v DiRROS: 23.01.2026; Ogledov: 467; Prenosov: 414
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9. Spatially explicit individual-based model reveals the mauve stinger jellyfish distribution in the Mediterranean SeaMartin Vodopivec, Alenka Malej, 2025, izvirni znanstveni članek Povzetek: The mauve stinger Pelagia noctiluca is a holoplanktonic oceanic jellyfish known for its painful sting and large outbreaks at irregular intervals. As jellyfish field observations are almost exclusively limited to coastal regions, there are many unknowns about the spatial and temporal dynamics of most species. We approach the problem using a spatially explicit individual-based model for the mauve stinger in the Mediterranean Sea. The newly developed module for the OpenDrift Lagrangian particle tracking tool includes diel vertical migrations, fooddependent growth modeled on Michaelis–Menten kinetics, and custom mortality related to shallow waters and stranding. In the first part of the study, we analyze the resulting parameter space searching for solutions that ensure a stable Pelagia noctilucapopulation in the western Mediterranean Sea. In the second part, we conducted several 21-year simulations. Despite its relative simplicity, the model reveals for the first time the dynamic spatio-temporal distribution of Pelagia noctiluca. We demonstrate how spatially explicit individual-based model can be used to generate a realistic spatio-temporal distribution of marine zooplankton, even with a limited set of observations and loosely constrained parameters. The model code is easy to modify and freely available.
Ključne besede: individual-based model, agent-based model, zooplankton, Lagrangian particle tracking, ocean circulation, jellyfish
Objavljeno v DiRROS: 05.06.2025; Ogledov: 1374; Prenosov: 1056
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10. Macrojellyfish (Scyphozoa and Ctenophora) in two enclosed marine systems (the sea of Marmara and Adriatic sea) : a reviewMelek Isinibilir, Alenka Malej, Davor Lučić, Martin Vodopivec, 2024, samostojni znanstveni sestavek ali poglavje v monografski publikaciji Povzetek: Although geographically well apart, there are interesting similarities between the ecosystems of the Sea of Marmara and the Adriatic Sea. In this study, following an evaluation of the ecological problems as well as oceanography, productivity, plankton biomass of these seas, macro-jellyfish ecology of the two ecosystems were discussed comparatively. The Sea of Marmara and the Adriatic Sea are among the areas where increases in jellyfish and mucilage events have been observed in recent decades. Environmental problems such as global warming, oxygen depletion, eutrophication, overfishing, intense maritime traffic, and habitat destruction are causing opportunistic and alien species to increase in both abundance and number of species. As biodiversity declines due to habitat destruction, so does the ecosystem’s means and ability to combat the invasion of alien species in both ecosystems. Accordingly, disruption of lower food chains can put pressure on the entire ecosystem and affect socio-ecological prospects. The number of species of Scyphozoa and Ctenophora was found to be higher in the Adraitic Sea compared to the Sea of Marmara. Mass occurrences with a clear seasonal pattern and related to the geographical location were observed for Aurelia aurita, Rhizostoma pulmo, Chrysaora hysoscella and non-native Mnemiopsis leidyi in the Marmara Sea. However, although A. aurita and R. pulmo show widespread blooms according to the seasons and regions in the Adriatic Sea, C. hysoscella and M. leidyi produced blooms limited to a few areas. Negative and positive interactions of macrojelyfishes with human were also considered. Semi-enclosed seas such as the Sea of Marmara and the Adriatic Sea are representative of many temperate coastal waters where climate change and anthropogenic stressors are increasing, and the ecosystem has changed from a fish-dominated to a jellyfish-dominated ecosystem.
Ključne besede: jellyfish, eutrophication, diversity, introduce, fisheries
Objavljeno v DiRROS: 07.05.2025; Ogledov: 1133; Prenosov: 854
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