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1.
Phytosociological description of Quercus petraea forest stands with Chamaecytisus hirsutus and Erica carnea in the Vipavska brda (southwestern Slovenia)
Igor Dakskobler, 2014

Abstract: Fitocenološko smo raziskali sestoje gradna (Quercus petraea) v flišnem gričevju Vipavskih brd in na robu planote Vrhe (jugozahodna Slovenija), v katerih v zeliščni plasti prevladuje vrsta Erica carnea. Ugotavljamo, da so dolgotrajen degradacijski stadij na rastiščih bukovega gozda iz asociacije Seslerio autumnalis-Fagetum. Na podlagi primerjav s podobnimi gradnovimi sestoji iz asociacij Melampyro vulgati-Quercetum petraeae, Seslerio autumnalis-Quercetum petraeae in Erico carneae-Quercetum petraeae preučene sestoje uvrščamo v novo asociacijo Chamaecytiso hirsuti-Quercetum petraeae. Od sestojev primerjanih združb jih najbolj razlikujejo vrste Erica carnea, Sorbus aria, Lathyrus linifolius, Loranthus europaeus in Erythronium dens-canis. Novo asociacijo uvrščamo v zvezo Carpinion orientalis in v red Quercetalia pubescenti-petraeae.
Keywords: fitocenologija, sinsistematika, degradacijski stadij, Vipavska brda, Vrhe, Slovenija
DiRROS - Published: 16.01.2020; Views: 13; Downloads: 15
.pdf Fulltext (1017,67 KB)

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Evaluating short-term impacts of forest management and microsite conditions on understory vegetation in temperate fir-beech forests : floristic, ecological, and trait-based perspective
Janez Kermavnar, Aleksander Marinšek, Klemen Eler, Lado Kutnar, 2019

Abstract: Forest understory vegetation is largely influenced by disturbances and given local abiotic conditions. Our research focuses on the early response of understory vegetation to various forest management intensities in Dinaric fir-beech forests in Slovenia: (i) control, (ii) 50% cut of stand growing stock, and (iii) 100% cut of stand growing stock. Apart from identifying overstory removal effects, we were interested in fine-scale variation of understory vegetation and environmental determinants of its species composition. Vegetation was sampled within 27 karst sinkholes, which represent a dominant landform in studied forests. Within each sinkhole, five sampling plots, varying in slope aspect (centre, north, east, south, west), were established (135 in total), where pre-treatment (in 2012) and post-treatment (in 2014) floristic surveys were conducted. The sampled understory species were characterized in terms of Ellenberg's indicator values (EIVs) and plant functional traits (plant height, seed mass, specific leaf area, leaf dry matter content). Diversity metrics (species richness, total cover, Shannon index) increased in plots where the silvicultural measures were applied. Tree species richness also increased in 100% cutting. A redundancy analysis revealed that species composition was related to environmental variables, which are directly influenced by management interventions (overstory canopy cover, microclimate maximum daily temperature, soil properties thickness of organic soil layer) as well as by topographic factors (slope inclination and surface rockiness). EIVs for light were significantly affected by treatment intensity, whereas soil-related EIVs (moisture, reaction, nutrients) depended more on the within-sinkhole position. Canopy gaps, compared with uncut control plots, hosted a higher number of colonizing species with a higher plant height and smaller seeds, while leaf traits did not show a clear response. We found a negative correlation between pre-treatment species (functional) richness and post-treatment shifts in floristic (functional) composition. Plots with higher richness exhibited smaller changes compared with species-poor communities. Incorporating different perspectives, the results of this study offer valuable insights into patterns of understory vegetation response to forest management in fir-beech forests.
Keywords: canopy gap, microsite environment, Ellenberg indicator values, plant functional traits, compositional resistance, karst topography, fir-beech forest
DiRROS - Published: 06.12.2019; Views: 135; Downloads: 77
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Škodljivi organizmi in škodljivi dejavniki na sadikah gozdnega drevja v obdobju 1997-2018
Peter Smolnikar, Nikica Ogris, Barbara Piškur, 2019

Abstract: Škodljivi organizmi (ŠO) in abiotski škodljivi dejavniki (ŠD) na sadikah gozdnega drevja v gozdnih drevesnicah resno otežujejo vzgojo zdravih in kakovostnih sadik. Za preučitev pomembnejših in najpogosteje pojavljajočih se ŠO in ŠD smo analizirali letne zapisnike o zdravstvenih pregledih iz 18 gozdnih drevesnic v obdobju 1997-2018. Rezultati so pokazali, da so poškodbe v 68 % zabeleženih primerov posledica delovanja patogenih gliv, v 29 % primerih žuželk ter v 1,1 % abiotskih dejavnikov. Poškodbe so bile zabeležene na 45 različnih rodovih drevesnih in grmovnih vrst, in sicer največkrat na rodovih Quercus (24,1 %) in Pinus (17,5 %), najpogostejše poškodbe so bile na listih oziroma iglicah (64,0 %). Najpogosteje beležene bolezni so bile pepelovke (Erysiphe sp.), največ različnih ŠO in ŠD pa se je pojavljalo na borih (Pinus sp.). Poškodovanost sadik je bila običajno nizka (do 10 %), vendar je močno variirala med leti. Za pridelovanje kakovostnih in zdravih sadik je ključen celosten pristop pri varstvu in vzgoji sadik.
Keywords: škodljiv organizem, bolezen, poškodovanost, sadika, semenka, mlada rastlina, drevesnica, Slovenija
DiRROS - Published: 06.12.2019; Views: 142; Downloads: 43
.pdf Fulltext (732,65 KB)

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