1. New records of rarely reported species in the Mediterranean Sea (March 2024)Markos Digenis, Okan Akyol, Laure Benoit, Marina Biel-Cabanelas, Öznur Yazılan Çamlik, Konstantinos Charalampous, Archontia Chatzispyrou, Borut Mavrič, Martina Orlando-Bonaca, Leon Lojze Zamuda, 2024, izvirni znanstveni članek Povzetek: This Collective Article presents information about 30 species with records in eight countries (Greece, Israel, Italy, Montenegro, Slovenia, Spain, Syria and Türkiye) and six ecoregions extending from the Alboran to the Levantine Seas. The recorded species belong to eight Phyla (4 Chlorophyta, 1 Rhodophyta, 1 Porifera, 3 Cnidaria, 2 Platyhelminthes, 2 Arthropoda, 2 Mollusca and 15 Chordata) as follows: Chlorophyta: Didymosporangium repens, Ochlochaete hystrix and Phaeophila hirsuta are reported for the first time from the Aegean coasts of Türkiye and Penicillus capitatus is firstly recorded in Slovenian coastal waters; Rhodophyta: Ptilophora dentata is recorded for the first time in Turkish coasts, from the entrance of a marine cave; Porifera: Tethya meloni is reported from Montenegrin waters; Cnidaria: Savalia savaglia and Dendrophyllia ramea are firstly observed north of the Almeria-Oran front in the southeastern Iberian Peninsula, while Spinimuricea cf. atlantica is firstly recorded in the Gulf of Lion constituting the easternmost record of the species in the Mediterranean Sea; Platyhelminthes: the polyclad flatworms Thysanozoon brocchii and Planocera graffi are reported for the first time from Greek waters, observed inside marine caves; Mollusca: Ascobulla fragilis is firstly reported from the Eastern Levantine Sea while the blanket octopus Tremoctopus violaceus is recorded in Izmir Bay constituting its fifth sighting in the Aegean Sea after a quarter of a century; Arthropoda: the copepod Ditrychocorycaeus africanus is firstly recorded in the Ionian Sea while the tufted ghost crab Ocypode cursor is detected further north in the Tyrrhenian Sea; Chordata: the bothid flounder Arnoglossus grohmanni is firstly reported in Spain while specimens of the rare bythitid Bellottia apoda are presented for the Adriatic Sea; the chondrichthyans Chimaera monstrosa, Dalatias licha, Heptranchias perlo, Leucoraja circularis, Mustelus mustelus, Oxynotus centrina, Squatina aculeata and Torpedo marmorata are presented as collected within 13 continuous years in the bathyal zone of the Antalya Bay; the speleophilic fish Grammonus ater is firstly recorded in the Alboran Sea, observed in a marine cave; the critically endangered sandy ray Leucoraja circularis is reported from the eastern Ionian Sea; the crested oarfish Lophotus lacepede is reported for the first time from Sardinia, based on evidence dating back 20 years; the white trevally Pseudocaranx dentex is firstly recorded in Tremiti Islands (Adriatic Sea, Italy) while the phaeton dragonet Synchiropus phaeton and the gobid Zebrus pallaoroi are firstly reported from Syrian and Italian waters, respectively.
Ključne besede: Mediterranean Sea, rare species, flora, fauna
Objavljeno v DiRROS: 03.06.2024; Ogledov: 77; Prenosov: 54
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2. Too hot to handle : effects of water temperature on the early life stages of Gongolaria barbata (Fucales)Ana Lokovšek, Valentina Pitacco, Annalisa Falace, Domen Trkov, Martina Orlando-Bonaca, 2024, izvirni znanstveni članek Povzetek: Gongolaria barbata plays a crucial role as a habitat-forming Fucales species in the Mediterranean Sea, thriving in shallow, sheltered coastal regions, where it exhibits optimal growth in a temperature range of 10 to 25 °C. In the northern Adriatic Sea, a semi-enclosed part of the Mediterranean, there has been a remarkable increase in seawater temperatures in recent decades, often exceeding 28 °C in summer. These high temperatures pose a significant threat to the vulnerable early life stages of G. barbata. This study delves into the effects of four temperatures (15, 18, 24, and 28 °C) on the growth of G. barbata over its first 16 days, closely monitoring mortality, deformities, and overall survival. Our experiments reveal that higher temperatures can result in deformities and increased mortality of germlings. Notably, a temperature of 28 °C resulted in the death of all germlings within the first week, whereas those exposed to 24 °C survived until the second week, albeit with significant deformities prior to death. In contrast, germlings cultivated at 15 and 18 °C exhibited normal development with minimal deformities. These results highlight the susceptibility of the early life stages of G. barbata to temperature-induced stress and provide valuable insights into the potential consequences of rising seawater temperatures in the Mediterranean.
Ključne besede: sea temperature, early stages of growth, deformations, macroalgae, climate change, Mediterranean Sea
Objavljeno v DiRROS: 17.05.2024; Ogledov: 129; Prenosov: 233
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3. Heavy metal signature and environmental assessment of nearshore sediments: Port of Koper (Northern Adriatic Sea)Nastja Rogan Šmuc, Matej Dolenec, Sabina Dolenec, Ana Mladenovič, 2018, izvirni znanstveni članek Povzetek: Heavy metal abundance and potential environmental risks are reported for surface sediments (n = 21) from the Port of Koper area, Republic of Slovenia. The enrichment factor (EF) indicates minor enrichment in arsenic (As), cadmium (Cd), copper (Cu), molybdenum (Mo), lead (Pb), antimony (Sb), and zinc (Zn), moderately to severely enriched with nickel (Ni). The trace metal chemistries, in the context of sediment quality guidelines (SQG), imply adverse threshold effect concentrations (TEC) and probable effect concentrations (PEC), for Ni only. Sediment sequential leaching experiments demonstrated that the majority of heavy metals were of natural lithogenic origin and low bioavailability. The heavy metals’ potential for “Risk Assessment Code” values exhibited no or low anthropogenic environmental burden, with the exception of Mo.
Ključne besede: port sediments, heavy metals, chemical speciation, risk assessment, Northem Adriatic Sea
Objavljeno v DiRROS: 12.12.2023; Ogledov: 248; Prenosov: 124
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4. Coastal flood risk assessment : an approach to accurately map flooding through national registry-reported eventsErik Kralj, Peter Kumer, Cécil J. W. Meulenberg, 2023, izvirni znanstveni članek Ključne besede: sea flood prediction, flooding maps, climate change resilience, natural disaster registry, coastal inundation, flood-prone areas
Objavljeno v DiRROS: 08.12.2023; Ogledov: 361; Prenosov: 138
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5. Late-Quaternary evolution of the semi-confined alluvial megafan of Isonzo River (Northern Adriatic): where the fluvial system of the Southern Alps meets the karstLivio Ronchi, Alessandro Fontana, Ana Novak, Annamaria Correggiari, Sašo Poglajen, 2023, izvirni znanstveni članek Povzetek: The evolution of alluvial megafans has mainly been investigated in unconfined settings; however, at the boundary of these large depositional systems, the development of fluvial channels can be affected by structural constraints with regional extent. Here we present the study of the eastern sector of the megafan of Isonzo River, in the Gulf of Trieste, where this system fed through the southern Alps is constrained by the Karst and Istria cliffs. Although this area is now submerged under the northern Adriatic Sea, stratigraphy from seismo-acoustic profiles, drill cores and multi-beam bathymetry allows us to reconstruct the paleochannel system of the Isonzo River in detail, which was likely active within the period of 21–17.5 ka cal BP, at the end of LGM. This was reconstructed for over 50 km and currently represents the longest abandoned fluvial channel in the Mediterranean seabed. The occurrence of the mountain fringe and competition with nearby alluvial systems forced the paleochannel to follow the present coastline and conditioned the slope of its thalweg to decrease almost to null, resulting the transformation from the megafan to the undifferentiated alluvial plain.
Ključne besede: marine geology, CHIRP, stratigraphy, bathymetry, last glacial maximum, adriatic sea
Objavljeno v DiRROS: 31.05.2023; Ogledov: 360; Prenosov: 115
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6. Ecological time series and integrative taxonomy unveil seasonality and diversity of the toxic diatom Pseudo-nitzschia H. Peragallo in the northern Adriatic SeaTimotej Turk Dermastia, Federica Cerino, David Stanković, Janja Francé, Andreja Ramšak, Magda Tušek-Žnidarič, Alfred Beran, Vanessa Natali, Marina Cabrini, Patricija Mozetič, 2020, izvirni znanstveni članek Ključne besede: Pseudo-nitzschia, morphology, phylogeny, seasonality, time series, Adriatic Sea
Objavljeno v DiRROS: 18.03.2020; Ogledov: 2806; Prenosov: 859
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