1. List strong and list normal edge-coloring of (sub)cubic graphsBorut Lužar, Edita Máčajová, Roman Soták, Diana Švecová, 2026, izvirni znanstveni članek Povzetek: A ▫${\ strong edge-coloring}$▫ of a graph is a proper edge-coloring, in which the edges of every path of length ▫$3$▫ receive distinct colors; in other words, every pair of edges at distance at most ▫$2$▫ must be colored differently. The least number of colors needed for a strong edge-coloring of a graph is the ▫${\ strong chromatic index}$▫. We consider the list version of the coloring and prove that the list strong chromatic index of graphs with maximum degree ▫$3$▫ is at most ▫$10$▫. This bound is tight and improves the previous bound of ▫$11$▫ colors. We also consider the question whether the strong chromatic index and the list strong chromatic index always coincide. We answer it in negative by presenting an infinite family of graphs for which the two invariants differ. For the special case of the Petersen graph, we show that its list strong chromatic index equals ▫$7$▫, while its strong chromatic index is ▫$5$▫. Up to our best knowledge, this is the first known edge-coloring for which there are graphs with distinct values of the chromatic index and its list version. In relation to the above, we also initiate the study of the list version of the normal edge-coloring. A ▫${\ normal edge-coloring}$▫ of a cubic graph is a proper edge-coloring, in which every edge is adjacent to edges colored with ▫$4$▫ distinct colors or to edges colored with ▫$2$▫ distinct colors. It is conjectured that ▫$5$▫ colors suffice for a normal edge-coloring of any bridgeless cubic graph and this statement is equivalent to the Petersen Coloring Conjecture. It turns out that similarly to strong edge-coloring, list normal edge-coloring is much more restrictive and consequently for many graphs the list normal chromatic index is greater than the normal chromatic index. In particular, we show that there are cubic graphs with list normal chromatic index at least ▫$9$▫, there are bridgeless cubic graphs with its value at least ▫$8$▫, and there are cyclically ▫$4$▫-edge-connected cubic graphs with value at least ▫$7$▫.
Ključne besede: strong edge-coloring, list strong edge-coloring, normal edge-coloring, list normal edge-coloring, Petersen coloring, Petersen coloring conjecture
Objavljeno v DiRROS: 05.02.2026; Ogledov: 535; Prenosov: 65
 Celotno besedilo (882,58 KB) |
2. Remarks on proper conflict-free degree-choosability of graphs with prescribed degeneracyMasaki Kashima, Riste Škrekovski, Rongxing Xu, 2026, izvirni znanstveni članek Povzetek: A proper coloring ▫$\phi$▫ of ▫$G$▫ is called a proper conflict-free coloring of ▫$G$▫ if for every non-isolated vertex ▫$v$▫ of ▫$G$▫, there is a color ▫$c$▫ such that ▫$|\phi^{-1}(c) \cap N_G(v)| = 1$▫. As an analogy of degree-choosability of graphs, we introduced the notion of proper conflict-free (degree ▫$+k$▫)-choosability of graphs. For a non-negative integer ▫$k$▫, a graph ▫$G$▫ is proper conflict-free (degree ▫$+k$▫)-choosable if for any list assignment ▫$L$▫ of ▫$G$▫ with ▫$|L(v)| \ge d_G(v) + k$▫ for every vertex ▫$v \in V(G)$▫, ▫$G$▫ admits a proper conflict-free coloring ▫$\phi$▫ such that ▫$\phi(v) \in L(v)$▫ for every vertex ▫$v \in V(G)$▫. In this note, we first remark if a graph ▫$G$▫ is ▫$d$▫-degenerate, then ▫$G$▫ is proper conflict-free (degree ▫$+d+1$▫)-choosable. Furthermore, when ▫$d=1$▫, we can reduce the number of colors by showing that every tree is proper conflict-free (degree ▫$+1$▫)-choosable. This motivates us to state a question.
Ključne besede: proper conflict-free coloring, list coloring, degree-choosability, degeneracy
Objavljeno v DiRROS: 05.02.2026; Ogledov: 348; Prenosov: 109
Celotno besedilo (495,29 KB)
Gradivo ima več datotek! Več... |
3. Threatened bee species of Europe in SloveniaAndrej Gogala, 2018, izvirni znanstveni članek Povzetek: Three Endangered, seven Vulnerable and 40 Near Threatened species from the European Red List of Bees were recorded in Slovenia. Their distribution in Slovenia is overviewed and the importance of local populations for their survival in Europe is evaluated. Among the Endangered species the Slovenian population of Colletes graeffei is important. The species has also its locus typicus in Slovenia. Interesting is the case of Epeolus cruciger which is very numerous in Slovenia due to transition to a secondary host, Colletes hederae. Its other host, Colletes succinctus, is endangered in Slovenia.
Ključne besede: European Red List, bees, Apiformes, Hymenoptera, fauna, Slovenia
Objavljeno v DiRROS: 27.01.2026; Ogledov: 228; Prenosov: 143
Celotno besedilo (2,99 MB)
Gradivo ima več datotek! Več... |
4. An overview of internationally important plant taxa from KosovoFadil Millaku, Elez Krasniqi, Naim Berisha, 2025, ni določena Povzetek: This study investigates internationally important plant taxa in Kosovo, using data from international lists and local records. The goals are to identify these taxa, outline their significance, and enhance understanding of their ecology, distribution, and conservation status. The analysis identified 59 internationally significant plant taxa in Kosovo, with the Orchidaceae family prominently represented by 33 taxa. This highlights global conservation concerns for orchids due to their vulnerability to habitat loss and illegal trade. Other important families include Amaryllidaceae, Liliaceae, and Lycopodiaceae. These taxa are listed under frameworks such as the Habitats Directive, CITES, and the Bern Convention, indicating the need for rigorous conservation efforts. Habitat loss and fragmentation are primary threats, impacting 26 taxa, followed by wild collection, grazing, agriculture, and urbanization. Effective conservation strategies should involve habitat protection, sustainable harvesting, and community engagement.
Ključne besede: Kosovo flora, European red list, conservation, prioritization, biodiversity
Objavljeno v DiRROS: 24.01.2026; Ogledov: 189; Prenosov: 84
Celotno besedilo (1,29 MB)
Gradivo ima več datotek! Več... |
5. The diversity of parasitoids and their role in the control of the Siberian moth, Dendrolimus sibiricus (Lepidoptera: Lasiocampidae), a major coniferous pest in Northern AsiaNatalia I. Kirichenko, Alexander A. Ageev, Sergey A. Astapenko, Anna N. Golovina, Dmitry R. Kasparyan, Oksana V. Kosheleva, Alexander V. Timokhov, Ekaterina V. Tselikh, Evgeny V. Zakharov, Dmitrii L. Musolin, Sergey A. Belokobylskij, 2024, izvirni znanstveni članek Povzetek: The Siberian moth, Dendrolimus sibiricus Tschetv., 1908 (Lepidoptera: Lasiocampidae) is a conifer pest that causes unprecedented forest mortality in Northern Asia, leading to enormous ecological and economic losses. This is the first study summarizing data on the parasitoid diversity and parasitism of this pest over the last 118 years (1905–2022). Based on 860 specimens of freshly reared and archival parasitoids, 16 species from two orders (Hymenoptera and Diptera) were identified morphologically and/or with the use of DNA barcoding. For all of them, data on distribution and hosts and images of parasitoid adults are provided. Among them, the braconid species, Meteorus versicolor (Wesmael, 1835), was documented as a parasitoid of D. sibiricus for the first time. The eastern Palaearctic form, Aleiodes esenbeckii (Hartig, 1838) dendrolimi (Matsumura, 1926), status nov., was resurrected from synonymy as a valid subspecies, and a key for its differentiation from the western Palaearctic subspecies Aleiodes esenbeckii ssp. esenbecki is provided. DNA barcodes of 11 parasitoid species from Siberia, i.e., nine hymenopterans and two dipterans, represented novel records and can be used for accurate molecular genetic identification of species. An exhaustive checklist of parasitoids accounting for 93 species associated with D. sibirisus in northern Asia was compiled. Finally, the literature and original data on parasitism in D. sibiricus populations for the last 83 years (1940–2022) were analysed taking into account the pest population dynamics (i.e., growth, outbreak, decline, and depression phases). A gradual time-lagged increase in egg and pupal parasitism in D. sibiricus populations was detected, with a peak in the pest decline phase. According to long-term observations, the following species are able to cause significant mortality of D. sibiricus in Northern Asia: the hymenopteran egg parasitoids Telenomus tetratomus and Ooencyrtus pinicolus; the larval parasitoids Aleiodes esenbeckii sp. dendrolimi, Cotesia spp., and Glyptapanteles liparidis; and the dipteran pupal parasitoids Masicera sphingivora, Tachina sp., and Blepharipa sp. Their potential should be further explored in order to develop biocontrol programs for this important forest pest.
Ključne besede: Hymenoptera, Diptera, Lasiocampidae, Siberia, Asia, archival specimens, morphological identification, DNA barcoding, check list, parasitism
Objavljeno v DiRROS: 17.01.2025; Ogledov: 813; Prenosov: 528
Celotno besedilo (17,35 MB)
Gradivo ima več datotek! Več... |
6. |
7. Poročilo o preskusu št.: LVG 2024-061 : vzorec št. 2024/00310Nikica Ogris, 2024, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, črna jelša, Alnus glutinosa, list, rja, gliva, Melampsoridium betulinum
Objavljeno v DiRROS: 17.07.2024; Ogledov: 777; Prenosov: 314
Celotno besedilo (1,13 MB) |
8. Novost pri vzdrževanju tračnih žagnih listovDominika Gornik Bučar, 2021, strokovni članek Ključne besede: žage, tračne žage, vzdrževanje, tračni žagni list, gozdovi, gozdarstvo, lesarstvo, žagarstvo
Objavljeno v DiRROS: 12.11.2022; Ogledov: 1496; Prenosov: 491
Celotno besedilo (5,35 MB) |
9. Robinijeva grizlica, Nematus tibialis, nova tujerodna vrsta v SlovenijiMaarten De Groot, Andreja Kavčič, 2017, strokovni članek Ključne besede: gozdovi, varstvo gozdov, invazivne tujerodne vrste, robinja, Robinia pseudoacacia, list, robinijeva grizlica, Nematus tibialis, pagosenica
Objavljeno v DiRROS: 28.07.2020; Ogledov: 2640; Prenosov: 1726
 Povezava na celotno besedilo
Gradivo ima več datotek! Več... |
10. A synthesis of the characteristics of current national, regional and international forestry journalsMaja Peteh, 2020, izvirni znanstveni članek Povzetek: One of the main objectives of the International Union of Forest Research Organization%s WP 9.01.06 (Forest Science Publishing) is to clarify the range of forestry-related journals in the context of the overall objective of supporting authors and readers to deepen their knowledge of forestry. This study extended an earlier list of forestry journals using the ISSN database and the CAB abstracts. The study included 451 journal titles, each categorized by ISSN, publisher, language of publication, website, and geographical coverage (i.e. national, regional, international, or three mixed intermediate categories), as well as information on indexing in Web of Science, Scopus, DOAJ, and SherpaRomeo. The included journals are published in 61 countries and in 32 different languages. Those categorized as international are mostly published in English. 21.7% of the journals are indexed in Web of Science and 34.1% in Scopus. 95.6% of the titles are published online or in the print+online publishing model, but only 57.0% of the titles are published in Open Access, of which only 33.7% are indexed in DOAJ.
Ključne besede: forestry, geographical coverage, journal title list, scientific publishing
Objavljeno v DiRROS: 13.07.2020; Ogledov: 2565; Prenosov: 1222
Celotno besedilo (923,91 KB)
Gradivo ima več datotek! Več...
Gradivo je zbirka in zajema 1 gradivo! |
