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Povzetek: Phytoplankton plays a fundamental role in marine ecosystems and is widely used to assess environmental change. In this study, light microscopy and DNA metabarcoding approaches were used to investigate phytoplankton communities at three long-term monitoring sites in the northern Adriatic Sea. By combining the two approaches, more than 500 species were recorded. Metabarcoding detected substantially higher diversity, particularly among small and fragile organisms that are difficult to identify under a microscope, whereas microscopy was better for identifying larger species with distinctive morphology. Because species contain different amounts of genetic material, DNA data can overestimate or underestimate their true contribution to the community. Indeed, after applying correction factors that account for these differences, the DNA-based estimates became more consistent with the microscopy results for several phytoplankton groups. The differences among the samples were influenced more by the approach used than by the sampling location. Overall, combining these two approaches provides an accurate and robust picture of phytoplankton communities. In this way, it is possible to improve the reliability of marine biodiversity assessments and to support better environmental monitoring and management in coastal seas.
Ključne besede: phytoplankton, diversity, environmental DNA, Long-Term Ecological Research, amplicon sequencing, North Adriatic Sea
Objavljeno v DiRROS: 25.03.2026; Ogledov: 289; Prenosov: 220
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Povzetek: This study presents the first comprehensive assessment of microalgal diversity in two Slovenian transitional waters (TWs): the shallow brackish lagoon of the Škocjanski Zatok Nature Reserve (SZNR) and the Rižana River estuary within the Port of Koper (PK) area. Between 2018 and 2021, water samples collected with a phytoplankton net were analyzed using light and scanning electron microscopy. In total, 240 species from 117 genera were identified in TW, dominated by diatoms and dinoflagellates, surpassing the diversity at a marine coastal station (91 species, 59 genera). Species richness was higher in PK (226) than in SZNR (154), mainly due to dinoflagellates and coccolithophores. Marine taxa predominated along the salinity gradient, with moderate contributions from brackish taxa and fewfreshwater forms, reflecting both natural and anthropogenic influences. Planktonic taxa dominated at all sites, while benthic forms were abundant in the lagoon, particularly in spring. Thirty-two taxa were recorded for the first time in Slovenian TW, mostly benthic or tychopelagic diatoms. The detection of Coolia monotis and five cyanobacterial genera with potentially harmful traits highlights the role of TW as an ecological interface. The taxonomic sufficiency analysis showed that the order level is sufficient to distinguish transitional from marine assemblages, beyond which ecological information is lost. Overall, this study highlights the importance of detailed taxonomic resolution for detecting microalgal diversity, including harmful and non-indigenous species to ensure robust ecological assessments under the WFD and MSFD directives.
Ključne besede: transitional waters, diversity, phytoplankton, harmful algal blooms, non-indigenous species, Adriatic Sea
Objavljeno v DiRROS: 27.01.2026; Ogledov: 462; Prenosov: 443
Celotno besedilo (3,43 MB)
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Povzetek: Brown algal forests (Cystoseira sensu lato) are key habitat-forming components of temperate rocky coasts but have experienced widespread decline across the Mediterranean Sea. This study investigates the current distribution and potential future shifts in brown algal forests across the Adriatic Sea under ongoing climate change. We combined non-destructive field-based mapping along the Slovenian coastline with remote-sensing products and spatial environmental predictors to model basin-wide habitat suitability. A multiscale geographically weighted regression (MGWR) framework was applied to account for spatial non-stationarity and to explicitly capture the fact that environmental drivers of habitat suitability operate at different spatial scales—an assumption that global models such as GAM or standard GWR cannot adequately address. Habitat suitability maps were generated for present-day conditions and projected under mid- and late-century climate scenarios. The results reveal pronounced latitudinal gradients, identify areas of ongoing canopy decline in the northern Adriatic, and highlight parts of the southern Adriatic as potential climate refugia. Overall, the study demonstrates a likely north–south contraction of suitable habitat for brown algal forests and underscores the value of multiscale spatial modelling for informing marine spatial planning, conservation prioritization, and climate- adaptive restoration under European policy frameworks.
Ključne besede: brown algal forests, Cystoseira s.l., habitat suitability, spatial modelling, Adriatic Sea, climate change, shifts
Objavljeno v DiRROS: 21.01.2026; Ogledov: 405; Prenosov: 317
Celotno besedilo (7,06 MB)
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Povzetek: This article explores the establishment of a maritime spatial planning (MSP) framework in Slovenia. Following revised spatial planning legislation and the Directive 2014/89/EU, Slovenia initiated the development of processes and procedures for integrated MSP. Drawing on a dedicated research project, the article presents a proposed methodology grounded in the ecosystem approach, forming a foundation for integrated land–sea interaction planning. The framework outlines a four‐phase process: (1) preliminary MSPlan preparation, (2) MSPlan preparation, (3) MSPlan monitoring and evaluation of implementation, and (4) ongoing MSPlan monitoring and updating. Each phase consists of independent or sequential steps, which are also linked procedurally between the phases. A central feature linking the preliminary and main preparation phases is stakeholder involvement. While the MSPlan preparation phase ensures broad stakeholder participation, the preliminary phase engages those representing strategic development or conservation interests. Experts and other stakeholder groups may also be involved directly in the planning process. The article concludes by evaluating the adopted Slovenian MSPlan, highlighting deviations from the proposed process and assessing the extent of its implementation in relation to the original plan. It also emphasises the importance of developing the MSP process and its procedures in parallel to ensure strong alignment and facilitate a smoother preparation of the final MSPlan.
Ključne besede: coastal governance, research, maritime spatial planning, North Adriatic Sea
Objavljeno v DiRROS: 20.11.2025; Ogledov: 527; Prenosov: 232
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Ključne besede: cast aluminium alloys, sol-gel coatings, field testing, scanning electron microscopy, x-ray photoelectron spectroscopy, marine immersion, Adriatic Sea
Objavljeno v DiRROS: 25.04.2025; Ogledov: 1704; Prenosov: 600
Celotno besedilo (4,13 MB)
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