Digital repository of Slovenian research organisations

Search the repository
A+ | A- | Help | SLO | ENG

Query: search in
search in
search in
search in

Options:
  Reset


Query: "keywords" (habitat) .

1 - 10 / 23
First pagePrevious page123Next pageLast page
1.
Importance of habitat context in modelling risk maps for two established invasive alien plant species : the case of Ailanthus altissima and Phytolacca americana in Slovenia (Europe)
Maarten De Groot, Erika Kozamernik, Janez Kermavnar, Marija Kolšek, Aleksander Marinšek, Andreja Nève Repe, Lado Kutnar, 2024, original scientific article

Abstract: Forests are important ecosystems that face threats from climate change and global environmental shifts, with invasive alien plant species being a significant concern. Some of these invasive species have already become established, while others are in the process of naturalisation. Although forests are a relatively stable ecosystem, extreme weather events increase their vulnerability to change, and clearings left after natural disturbances are particularly susceptible to invasion by alien plant species (IAPS). We created risk maps of two species that have spread rapidly in the last decade: American pokeweed (Phytolacca americana) and the tree of heaven (Ailanthus altissima). We prepared a generalised linear model based on the occurrence data collected within the LIFE ARTEMIS project. Eleven environmental variables were used to determine habitat characteristics. We constructed two models for each species: one covering the entirety of Slovenia and the other specifically for the forested areas in Slovenia, with the latter incorporating forest-specific variables (such as forest sanitation felling and monocultures). We observed the presence of both species at lower altitudes and in close proximity to water sources. American pokeweed tends to occur nearer to railways, while the presence of the tree of heaven is associated with areas lacking carbonate parent material and influenced by land use patterns. In forested areas, the occurrence of American pokeweed is influenced by forest habitat characteristics, such as disturbances caused by extreme weather events or the prevalence of Norway spruce monocultures. In contrast, the occurrence of the tree of heaven is influenced by more general environmental variables, such as altitude and proximity to railways. Consequently, we have generated risk maps for the entirety of Slovenia and separately for forested areas, both of which indicate similar levels of risk, particularly for the tree of heaven. The risk map for American pokeweed highlights numerous vulnerable areas, especially forest edges, which are highly susceptible to invasion. Furthermore, there is a higher likelihood of this species occurring in areas that have undergone sanitation felling. This study suggests that the production of risk maps of IAPS could be improved by focussing on habitat types and taking into account habitat-specific variables. This approach could enhance the early detection and management of these invasive species.
Keywords: American pokeweed, tree of heaven, species distribution modelling, forests, forest disturbance, habitat suitability
Published in DiRROS: 26.03.2024; Views: 26; Downloads: 11
.pdf Full text (1,72 MB)
This document has many files! More...

2.
O domorodnosti alpskega kozoroga v Sloveniji
Andreja Nève Repe, Elena Bužan, Borut Toškan, Jernej Javornik, Boštjan Pokorny, Andrej Arih, Lars Zver, Maruša Prostor, Miha Krofel, Matija Stergar, Klemen Jerina, Hubert Potočnik, Rok Černe, Aleš Poljanec, 2023, professional article

Abstract: Alpski kozorog (Capra ibex) je alpski endemit. Na območju Slovenije naj bi bila vrsta iztrebljena v drugi polovici 17. stoletja, globalno pa je bila zaradi prelova na robu izumrtja konec 19. stoletja. Preživela je le populacija na širšem območju parka Gran Paradiso na skrajnem zahodu Alp v Italiji. Zaradi naselitev in drugih varstvenih programov sedaj alpski kozorog živi v celotnih Alpah, vključno s Slovenijo. Vendar pri nas njegove populacije nazadujejo in so v zelo slabem stanju, kar je lahko rezultat več dejavnikov. Malo izvornih osebkov ob naselitvah, zgodovinska ozka grla in ločenost kolonij so povzročili parjenje v sorodstvu, kar je slabšalo genetsko stanje populacij in lahko negativno vpliva tudi na demografijo. K številčnemu zmanjševanju vrste so lahko prispevale tudi bolezni. Za dolgoročno ohranitev alpskega kozoroga v Sloveniji so nujni takojšnji aktivni ohranitveni ukrepi, pogoj pa je ustrezna opredelitev izvornosti vrste, saj je (bila) zaradi prejšnjih pomanjkljivih podatkov umeščena med tujerodne. V prispevku na podlagi arheo-zooloških, genetskih in preliminarnih habitatnih analiz utemeljujemo, da je v Sloveniji kozorog domorodna vrsta. V raziskavah smo pokazali, da je vrsta živela na ozemlju zdajšnje Slovenije v poznoantičnem in zgodnje srednjeveškem obdobju. Preliminarno smo določili tudi primernost in povezanost habitata kozoroga v slovenskem alpskem svetu ter nakazali verjetne potrebne ukrepe za ohranitev vrste v Sloveniji.
Keywords: Capra ibex, izvornost vrste, programi varstva, Alpe, habitat, genetika
Published in DiRROS: 09.01.2024; Views: 205; Downloads: 58
.pdf Full text (475,48 KB)

3.
Contrasting responses of alien and ancient forest indicator plant species to fragmentation process in the temperate lowland forests
Mirjana Šipek, Lado Kutnar, Aleksander Marinšek, Nina Šajna, 2022, original scientific article

Abstract: Fragmentation is one of the major threats to biodiversity. In a fragmented landscape, forest specialists are losing suitable forest habitats with specific site and microclimate conditions, which results in their local extinction. Conversely, the invasion of alien species is facilitated by open forest areas and increased boundaries between forest fragments and adjacent land. We studied the effect of fragmentation in terms of fragment size impact on overall plant species richness and on selected ecologically important groups' richness, composition, and diversity. We surveyed vegetation in the interior of 47 fragments of various sizes and one unfragmented reference forest. Our results reveal that the effect of fragmentation is complex and differs for studied plant groups. Decreasing fragment size negatively affects the overall plant richness and richness of native and ancient forest indicator plants as well as their diversity, while the effect is positive for alien plants. The highest proportion of ancient forest indicator plant species and the lowest proportion of alien plants in the unfragmented forest underline the great conservation value of forest fragments. At the same time, our results reveal that large and diverse forest ecosystems are susceptible to biological invasions as well.
Keywords: forest fragment, indicator plants, invasion, diversity, habitat modification, habitat conservation
Published in DiRROS: 15.05.2023; Views: 305; Downloads: 167
.pdf Full text (2,16 MB)
This document has many files! More...

4.
Interakcija između efekata genetskestrukture i stanišnih uslova narast zelene duglazije u testovimaprovenijencija u Bosni i Hercegovini
Mirzeta Memišević Hodžić, Dalibor Ballian, Emina Šehović, 2020, original scientific article

Abstract: Douglas fir (Pseudotsuga menziesii (Mirbel) Franco) is the most important and most productive species in Eu-rope, outside its natural range. This study aimed to examine the presence of interaction between the effects of the genetic structure of provenances from the United States and Canada and three localities of provenan-ce tests in Bosnia and Herzegovina.For this research, we measured diameters at breast height of all trees, and heights of 10 trees per provenance in three tests of Douglas fir at the age of plants 32 years. Four provenances are represented in all three tests and additional two provenances in two tests. We examined the variance between provenances and habitats using multivariate analysis, for four provenances in all three habitats, and six provenances in two habitats (Bo-sanska Gradiška and Zavidovići).Multivariate analysis of variance for four provenances at all three localities showed that there were no stati-stically significant differences in diameters at breast height and heights caused by the interaction of provenan-ces x localities. Multivariate analysis for six joint provenances at Bosanska Gradiška and Zavidovići tests showed that there were no statistically significant differences for diameter at breast height caused by interac-tion locality x provenance, and there were statistically significant differences caused by interactions of locality x provenances for height.The obtained results can be used for the introduction of Douglas fir on predefined habitats that correspond to the conditions of the experimental plots, as well as for the selection of the best provenances for raising clone plantations or seed plantations
Keywords: Douglas fir, provenances, interaction provenance x habitat
Published in DiRROS: 08.03.2023; Views: 358; Downloads: 151
.pdf Full text (503,21 KB)
This document has many files! More...

5.
Selected microhabitat and surface temperatures of two sympatric lizard species
Anamarija Žagar, Veronica Gomes, Neftali Sillero, 2023, original scientific article

Keywords: lizards, habitat use, thermoregulation, interspecific interaction, competition
Published in DiRROS: 13.02.2023; Views: 479; Downloads: 285
.pdf Full text (1,20 MB)
This document has many files! More...

6.
Assessing the heterogeneity and conservation status of the Natura 2000 priority forest habitat type Tilio–Acerion (9180*) based on field mapping
Janez Kermavnar, Erika Kozamernik, Lado Kutnar, 2023, original scientific article

Abstract: Priority habitat types (HTs) within the Natura 2000 network are of the highest importance for conservation in Europe. However, they often occur in smaller areas and their conservation status is not well understood. One such HT is that of the Tilio–Acerion forests of slopes, screes and ravines (9180*). The Natura 2000 study site, Boč–Haloze–Donačka gora, in the Sub-Pannonian region of eastern Slovenia is characterized by a matrix of European beech forests and includes rather small, fragmented areas covered by Tilio–Acerion forests. The goal of this research was to examine the heterogeneity and conservation status of the selected HT through field mapping, which was performed in the summer of 2020. As the conservation of HT calls for a more detailed approach, we distinguished between the following four pre-defined habitat subtypes: (i) Acer pseudoplatanus-Ulmus glabra stands growing mostly in concave terrain, (ii) Fraxinus excelsior stands growing on slopes, (iii) Tilia sp. stands with thermophilous broadleaves occurring on ridges and slopes, (iv) Acer pseudoplatanus stands occurring on more acidic soils with an admixture of Castanea sativa. Field mapping information was complemented with the assessment of habitat subtype characteristics using remote sensing data. The results showed that habitat subtypes differed significantly in terms of area, tree species composition, forest stand characteristics, relief features and the various threats they experienced (e.g., fragmentation, tree mortality, ungulate browsing pressure). The differences between subtypes were also evident for LiDAR-derived environmental factors related to topography (i.e., terrain steepness and Topographic Position Index). This study provides a baseline for setting more realistic objectives for the conservation management of priority forest HTs. Due to the specificities of each individual habitat subtype, conservation activities should be targeted to the Natura 2000 habitat subtype level.
Keywords: forest habitat subtype, monitoring, biodiversity conservation, LiDAR, Slovenia, NATURA 2000
Published in DiRROS: 03.02.2023; Views: 936; Downloads: 240
.pdf Full text (9,53 MB)
This document has many files! More...

7.
Phylogenetic relations and range history of jerboas of the Allactaginae subfamily (Dipodidae, Rodentia)
Vladimir S. Lebedev, Georgy I. Shenbrot, Boris Kryštufek, Ahmad Mahmoudi, Marina N. Melnikova, Evgeniya N. Solovyeva, Alexandra A. Lisenkova, Enkhbat Undrakhbayar, Konstantin A. Rogovin, Alexey V. Surov, Ana A. Bannikova, 2022, original scientific article

Abstract: Five-toed jerboas of the subfamily Allactaginae comprise several complex taxa occurring over a wide distribution range covering a large part of the Eurasian arid belt. In this study, we employed current methods of molecular phylogenetics based on 15 nuclear genes and the mitochondrial gene cytb to revise relations and systematics within Allactaginae. We also applied species distribution modelling projected on paleo-environmental data to reconstruct the geographic patterns of speciation in Allactaginae. We elucidated the intergeneric relationships within this subfamily and clarifed interspecies relations within the genus Scarturus. Moreover, our results demonstrate the species status of S. caprimulga; outline the currently understudied diversity within Orientallactaga, Allactaga, and Pygeretmus; and improve the divergence estimates of these taxa. Based on our results from modelling of geographic range fragmentation in allactagines, we suggest the dating and location of speciation events and present hypotheses regarding general habitat niche conservatism in small mammals.
Keywords: molecular phylogeny, mitochondrial DNA, nuclear DNA, habitat modelling, phylogenetic history
Published in DiRROS: 28.01.2022; Views: 700; Downloads: 581
.pdf Full text (11,47 MB)
This document has many files! More...

8.
Continent-wide tree species distribution models may mislead regional management decisions : a case study in the transboundary biosphere reserve Mura-Drava-Danube
Marcus Sallmannshofer, Debojyoti Chakraborty, Harald Vacik, Gábor Illés, Markus Löw, Andreas Rechenmacher, Katharina Lapin, Sophie Ette, Dejan Stojanović, Andrej Kobler, Silvio Schueler, 2021, original scientific article

Abstract: The understanding of spatial distribution patterns of native riparian tree species in Europe lacks accurate species distribution models (SDMs), since riparian forest habitats have a limited spatial extent and are strongly related to the associated watercourses, which needs to be represented in the environmental predictors. However, SDMs are urgently needed for adapting forest management to climate change, as well as for conservation and restoration of riparian forest ecosystems. For such an operative use, standard large-scale bioclimatic models alone are too coarse and frequently exclude relevant predictors. In this study, we compare a bioclimatic continent-wide model and a regional model based on climate, soil, and river data for central to south-eastern Europe, targeting seven riparian foundation species%Alnus glutinosa, Fraxinus angustifolia, F. excelsior, Populus nigra, Quercus robur, Ulmus laevis, and U. minor. The results emphasize the high importance of precise occurrence data and environmental predictors. Soil predictors were more important than bioclimatic variables, and river variables were partly of the same importance. In both models, five of the seven species were found to decrease in terms of future occurrence probability within the study area, whereas the results for two species were ambiguous. Nevertheless, both models predicted a dangerous loss of occurrence probability for economically and ecologically important tree species, likely leading to significant effects on forest composition and structure, as well as on provided ecosystem services.
Keywords: bioclimatic model, ecological niche model, forest management, tree species selection, riparian forest habitat, climate change adaptation
Published in DiRROS: 22.03.2021; Views: 1227; Downloads: 830
.pdf Full text (2,47 MB)
This document has many files! More...

9.
Vplivi okoljskih dejavnikov na prostorsko razporeditev jelenjadi v Poljanski dolini in Polhograjskih dolomitih
Miran Hafner, Blaž Černe, 2020, original scientific article

Abstract: V Sloveniji navadni jelen (Cervus elaphus L.) še vedno širi svojo prisotnost na številna območja, med njimi tudi v Poljansko dolino in Polhograjske dolomite. V raziskavi smo proučili, kateri okoljski dejavniki ključno vplivajo na njegovo prostorsko razporeditev v gričevnatem in ponekod v sredogorskem proučevanem območju s povprečno gozdnatostjo 67 %. Raziskava temelji na vzorcu 585 georeferenciranih lokacij odvzema ter GIS-podatkovnih plasteh 34 okoljskih spremenljivk. Logistična regresija napoveduje, da se verjetnost za primernost prostora za habitat jelena v prvem modelu multivariatno povečuje z večanjem deleža gozdov, z manjšanjem razdalje do sosednjega območja, z večjim deležem dvoslojnih, raznomernih, prebiralnih gozdov ter grmišč in panjevcev, z večanjem deleža sestojev v obnovi ter zmanjšuje z manjšim deležem mladja. V drugem modelu smo odkrili tudi pozitiven vpliv deleža plodonosnega gozdnega drevja v lesni zalogi sestojev ter negativne vplive odsotnosti krmišč, večje razdalje do gozdnih cest in majhnih vrednosti sončnega obsevanja pozimi.
Keywords: navadni jelen, Cervus elaphus, habitat, Poljanska dolina, Polhograjski dolomiti, okoljski dejavniki, prostorska razporeditev, parkljarji, upravljanje z divjadjo, Slovenija
Published in DiRROS: 29.02.2020; Views: 2259; Downloads: 669
.pdf Full text (275,67 KB)

10.
Analiza uspešnosti vzpostavitve nadomestnega habitata Črni log - Hotiška gmajna s poudarkom na rastni uspešnosti sadik
Samar Al Sayegh-Petkovšek, 2019, original scientific article

Abstract: Analizirali smo vzpostavitev nadomestnega habitata Črni log - Hotiška gmajna, ki je bil osnovan jeseni 2010 s sajenjem predvsem dveletnih sadik drevesnih in grmovnih vrst kot omilitveni ukrep zaradi izgube gozdnih površin v Črnem logu ob izgradnji avtocestnega odseka Beltinci-Lendava. V obdobju od 2011 do 2017 smo določili deleže preživetja, izdelali ocene vitalnosti in določili višinski ter debelinski prirastek za 566 sadik sedmih drevesnih vrst (črna jelša, dob, gorski javor, divja češnja, maklen, čremsa in poljski brest), rastočih na 26 raziskovalnih ploskvah. Sajenje je bilo praviloma uspešno pri vseh analiziranih vrstah, z izjemo divje češnje, kljub nekoliko večjem izpadu v drugem rastnem obdobju (dob, črna jelša, čremsa) oziroma še tri leta po sajenju (dob). Domnevamo, da je na zmanjšano preživetje sadik v letu 2012 vplivala suša v obdobju od oktobra 2011 do februarja 2012. Hkrati so v aprilu 2012 poročali o spomladanski pozebi, za katero je zlasti občutljiv dob, katerega povprečni delež preživetja se je povečal na okoli 70 % šele v letu 2015 in se nato ni več bistveno spremenil. Na podlagi opaženih poškodb divje češnje, čremse in maklena že v letu 2011 ter gorskega javorja in poljskega bresta v letu 2012 sklepamo, da je tudi objedanje divjadi vplivalo na manjši delež preživetja, vendar manj kot neugodne vremenske razmere. V tretjem letu (2013) po vzpostavitvi nadomestnega habitata sta bila povprečni višinski in povprečni debelinski prirastek na koreninskem vratu za vse drevesne vrste, z izjemo divje češnje, pozitivna in bistveno večja od prejšnjega rastnega obdobja (april 2011 - april 2012). Upoštevaje deleže preživetja, višinsko in debelinsko priraščanje ter delež vitalnih sadik je najuspešnejša drevesna vrsta črna jelša, kar je pogoj za oblikovanje načrtovanega jelševega sestoja. Med vsemi opazovanimi vrstami pa je najmanj uspešna divja češnja. Delež preživetja sadik je bil namreč vseskozi manjši od zahtevanih 70 %, zato smo ocenili, da sajenje divje češnje na izbranih raziskovalnih ploskvah ni bilo uspešno. Na podlagi ugotovitev so jo že v jeseni 2013 ponovno sadili, vendar zunaj raziskovalnih ploskev in zato slednje ne vpliva na predstavljene rezultate. Lahko zaključimo, da se med Hotiško gmajno in Črnim logom uspešno vzpostavlja gozdni habitat, ki nadomešča prejšnje njivske površine in da bo lahko nadomestil oziroma omilil škodo zaradi izgube gozdnih površin v Črnem logu ob izgradnji avtoceste A5 na odseku Beltinci-Lendava. Pričakujemo, da bo nastali gozdni sestoj v naslednjih letih omogočil gnezdenje srednjega detla in belovratnega muharja, ki sta zaradi gradnje avtoceste izgubila del svojega habitata.
Keywords: nadomestni habitat, Črni log - Hotiška gmajna, Alnus glutinosa (L.) Gartn., Quercus robur L., Acer pseudoplatanus L., Acer campestre L., Prunus avium L., Prunus padus L., Ulmus minor Mill., sadike
Published in DiRROS: 08.08.2019; Views: 3006; Downloads: 820
.pdf Full text (633,15 KB)

Search done in 0.37 sec.
Back to top