1. Svetlobna onesnaženost na Dravskem poljuIgor Žiberna, Eva Konečnik Kotnik, Danijel Ivajnšič, 2023, independent scientific component part or a chapter in a monograph Abstract: Svetlobno onesnaževanje predstavlja obliko onesnaževanja okolja, ki v javnosti še ni v dovolj veliki meri prepoznana. V poglavju smo predstavili stanje svetlobnega onesnaženja na Dravskem polju in njegove spremembe v obdobju 2013-2021. Procese spreminjanja svetlobnega onesnaženja smo prikazali s pomočjo podatkov daljinskega zaznavanja. Drugi vir podatkov so predstavljale meritve s Sky Quality Metrom, ki v svetu predstavlja standardiziran način merjenja svetlobnega onesnaženja. Prostorske razlike v stopnji svetlobne onesnaženosti med posameznimi deli Dravskega polja smo prikazali tudi z vsenebnimi posnetki in njihovo analizo.
Keywords: Dravsko polje, radianca, daljinsko zaznavanje, prostorske razlike
Published in DKUM: 24.10.2025; Views: 0; Downloads: 6
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2. Nekatere lastnosti in aktivnosti starejših prebivalcev Dravskega poljaMaja Hadner, Danijel Ivajnšič, Eva Konečnik Kotnik, 2023, independent scientific component part or a chapter in a monograph Abstract: Delež ljudi, starejših od 65 let, narašča v razvitih državah, tudi v Sloveniji. Staranje prebivalstva vpliva na družbo kot celoto, kar se odraža tudi v prostoru. V poglavju so predstavljeni izsledki raziskave, s katero smo ugotavljali nekatere socialne lastnosti in aktivnosti starejših prebivalcev Dravskega polja, razlike med njimi in njihovo medsebojno pogojenost. Na razlike v izbranih socialnih lastnostih in aktivnostih med anketiranimi starejšimi posamezniki z Dravskega polja vplivajo dejavniki: višina dohodkov, stopnja izobrazbe in zdravstveno stanje. Spoznanja smo povezali z (družbeno)geografskimi značilnostmi regije. Opredelili smo povezavo z umeščenostjo naselij v prostor ter z razvojem in širitvijo naselij, gospodarskimi razmerami in njihovim vplivom na okolje. Poznavanje vzrokov heterogenosti v socialnih lastnostih ter v aktivnostih starostnikov lahko pripomore k razumevanju njihovega odnosa do prostora in delovanja v njem, s tem pa tudi na načrtovanje trajnostnih organizacijskih politik, vpeljavo ustreznih ukrepov in na kakovostno staranje v vse bolj starajoči se družbi Dravskega polja.
Keywords: Dravsko polje, starejši prebivalci, socialne lastnosti, aktivnosti, vzroki heterogenosti
Published in DKUM: 24.10.2025; Views: 0; Downloads: 2
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3. Local climate and cultivation practice shape total protein and phenolic content of mulberry (morus sp.) leaves in sub-mediterranean and sub-pannonian regions of SloveniaŠpela Jelen, Martin Kozmos, Jan Senekovič, Danijel Ivajnšič, Silvia Cappellozza, Andreja Urbanek Krajnc, 2025, original scientific article Abstract: Mulberry (Morus sp.) trees, traditionally cultivated for their leaves used in sericulture, have recently gained recognition for their adaptability and valuable ecosystem services. The biochemical composition of mulberry leaves varies both qualitatively and quantitatively, depending on genotype, environmental conditions, and cultivation practices. This study aimed to (1) identify differences in old local white (M. alba L.) and black mulberry (M. nigra L.) leaves, (2) perform a chemotype analysis of monitored local varieties, and (3) evaluate the influence of selected bioclimatic factors and pruning practices on the biochemical composition of leaves of white mulberry trees across Slovenian mesoregions. Black mulberry exhibited a higher phenolic content, particularly caffeoylquinic acid derivatives (16.05 mg/g dry weight (DW)), while white mulberry contained more quercetin glycosides (6.04 mg/g DW). Ward’s clustering identified three chemotypes, two of which had elevated protein and hydroxycinnamic acid levels, making them particularly suitable for silkworm feeding. Considering pruning practices of white mulberries, we determined significantly increased protein contents in yearly pruned trees (187.24 mg/g DW). Principal component analysis revealed interactions between bioclimatic, morphological, and biochemical factors, distinctly separating mulberries from the Sub-Mediterranean and Sub-Pannonian macroregions. White mulberries from Sub-Pannonian regions accumulated more caffeoylquinic acids in leaves under lower precipitation and total insolation, while those from Sub-Mediterranean regions exhibited higher kaempferol derivatives due to photo-thermal stress. These findings highlight the influence of climate and pruning on mulberry biochemical diversity and adaptation.
Keywords: mulberry, Morus alba, Morus nigra, local genetic resources, phenolics, protein, climatic effect, metabolite screening, pruning
Published in DKUM: 07.10.2025; Views: 0; Downloads: 2
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5. Diet of the common eagle ray, Myliobatis aquila (Linnaeus, 1758) in the northern Adriatic seaLovrenc Lipej, Riccardo Battistella, Borut Mavrič, Danijel Ivajnšič, 2025, original scientific article Abstract: Westudied the feeding habits of the common eagle ray (Myliobatis aquila) in the shallow northern Adriatic Sea. Altogether we analysed the contents of 122 stomachs of specimens caught as by-catch in the Gulf of Trieste and along the west Istrian coast. Shelled molluscs (N%=75.17), mainly bivalves and gastropods, were the most prominent prey categories, while crustaceans, sipunculids, echinoderms and polychaets (N% < 10) represented consid erably smaller numbers. With increasing size (and age) the eagle rays tend to become more experienced in preying molluscs and specialized to this prey category. The obtained results are in general in agreement with the limited existing reports on the diet of the common eagle ray in the Mediterranean Sea and adjacent areas.
Keywords: food habits, myliobatid, ontogenetic shift, Adriatic Sea
Published in DKUM: 25.08.2025; Views: 0; Downloads: 5
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6. Primerjalna analiza jakosti in smeri podnebnih sprememb v Evropi od pliocena do antropocenaDanijel Ivajnšič, Daša Donša, 2025, original scientific article Abstract: Razumevanje paleo-podnebnih sprememb na Zemlji je ključno za pripravo globalnih podnebnih modelov, ki napovedujejo podnebje v 21. stoletju, hkrati pa te spremembe predstavljajo pomembno gonilo recentnih vzorcev biodiverzitete. V prispevku z vektorsko analizo (CVA) obravnavamo spremembe povprečne letne temperature zraka in količine padavin v Evropi na podlagi baz PaleoClim in CHELSA, od pliocena do konca 21. stoletja. Osredotočamo se na regionalne podobnosti in razlike v jakosti in smeri sprememb. Rezultati poudarjajo naravno dinamiko podnebja in služijo kot umeritev za napovedi prihodnjih sprememb, ki so osnova za trenutne in prihodnje prilagoditvene strategije v Evropi.
Keywords: količina padavin, temperatura zraka
Published in DKUM: 23.07.2025; Views: 0; Downloads: 6
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7. A forgotten rodent from the Garden of Eden : what really happened to the long-tailed nesokia rat in the Mesopotamian marshes?Boris Kryštufek, Omar F. Al-Sheikhly, Javier Lazaro, Mukhtar K. Haba, Rainer Hutterer, Sayed B. Mousavi, Danijel Ivajnšič, 2021, original scientific article Keywords: field survey, habitat destruction, habitat modelling, Iraq, Nesokia bunnii, threatened species
Published in DKUM: 14.02.2025; Views: 0; Downloads: 3
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8. Environmental factors influencing the distribution of habitat types in the highlands of the Kamnik - Savinja AlpsSonja Škornik, Igor Paušič, Tone Novak, Franc Janžekovič, Danijel Ivajnšič, Mihaela Tostovršnik, Peter Kozel, 2021, original scientific article Abstract: In this work, we investigated the relationship between habitat types (HTs) and selected environmental factors in the highlands at altitudes of 1800–2558 m in the Kamnik-Savinja (KS) Alps in Slovenia. For 275 sampling sites, we identified seven HTs in their typical form and 11 ecotones, and provided field and modelled data for 14 environmental factors. HTs-environment relationships were analysed using multivariate ordination methods. In addition, binomial generalised linear mixed models were applied to reveal the influence of environmental factors on the occurrence of most frequent HTs in the study area [Outer Alpine Pinus mugo scrub (EUNIS code F2.4/Natura 2000 code 4070*), Southern rusty sedge grasslands (E4.413/6170), Cushion sedge carpets (E4.433/6170) and Fine calcareous screes (H2.43/8120)]. Results showed that certain modelled data (e.g. average annual air temperature) combined with field measurements (e.g. inclination, soil surface and soil moisture) can be effective predictors of most representative HTs in the study area, and thus useful for further refining of monitoring. Our study contributes to the knowledge and understanding of the relationships between environmental conditions and the occurrence of highland HTs in KS Alps, which probably concerns a great part of the Alpine highlands. Such knowledge is essential for assessing credible long-term conservation planning.
Keywords: Alpine habitat types, multivariate analysis, Pinus mugo, alpine and subalpine calcareous grasslands, Natura 2000, Slovenia
Published in DKUM: 10.12.2024; Views: 0; Downloads: 14
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9. Factors influencing habitat selection of three cryptobenthic clingfish species in the shallow North Adriatic SeaDomen Trkov, Danijel Ivajnšič, Marcelo Kovačić, Lovrenc Lipej, 2021, original scientific article Abstract: Cryptobenthic fishes were often overlooked in the past due to their cryptic lifestyle, so knowledge of their ecology is still incomplete. One of the most poorly studied taxa of fishes in the Mediterranean Sea is clingfish. In this paper we examine the habitat preferences of three clingfish species (Lepadogaster lepadogaster, L. candolii, and Apletodon incognitus) occurring in the Gulf of Trieste (Northern Adriatic). The results show that all three species have a cryptic lifestyle and are well-segregated based on their depth distribution and macro- and microhabitat preferences. L. lepadogaster inhabits shallow waters of the lower mediolittoral and upper infralittoral, where it occurs on rocky bottoms under stones. L. candolii similarly occurs in the rocky infralittoral under stones, but below the lower distribution limit of L. lepadogaster, and in seagrass meadows, where it occupies empty seashells. Such hiding places in seagrass meadows are also occupied by A. incognitus, which mostly occurs below the lower distribution limit of L. candolii. Despite the overlap of depth and macrohabitat, the probability of individuals of two species encountering each other or competing in the same habitat is low when the depth range is combined with the microhabitat preferences of these species.
Keywords: cryptobenthic fish, clingfish, habitat selection, depth distribution, Lepadogaster lepadogaster, Lepadogaster candolii, Apletodon incognitus
Published in DKUM: 18.10.2024; Views: 0; Downloads: 8
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10. GIS-based modelling reveals the fate of antlion habitats in the Deliblato SandsDanijel Ivajnšič, Dušan Devetak, 2020, original scientific article Abstract: The Deliblato Sands Special Nature Reserve (DSSNR; Vojvodina, Serbia) is facing a fast successional process. Open sand steppe habitats, considered as regional biodiversity hotspots, have drastically decreased over the last 25 years. This study combines multi-temporal and -spectral remotely sensed data, in-situ sampling techniques and geospatial modelling procedures to estimate and predict the potential development of open habitats and their biota from the perspective of antlions (Neuroptera, Myrmeleontidae). It was confrmed that vegetation density increased in all parts of the study area between 1992 and 2017. Climate change, manifested in the mean annual precipitation amount, signifcantly contributes to the speed of succession that could be completed within a 50-year period. Open grassland habitats could reach an alarming fragmentation rate by 2075 (covering 50 times less area than today), according to selected global climate models and emission scenarios (RCP4.5 and RCP8.5). However, M. trigrammus could probably survive in the DSSNR until the frst half of the century, but its subsequent fate is very uncertain. The information provided in this study can serve for efective management of sand steppes, and antlions should be considered important indicators for conservation monitoring and planning.
Keywords: antlions, biodiversity, climate change, Serbia
Published in DKUM: 03.09.2024; Views: 32; Downloads: 17
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