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Pomladitvena ekologija pragozda Lom v Bosni in Hercegovini : diplomsko delo - univerzitetni študij
Milosavljević, Jan (Author), Diaci, Jurij (Mentor) More about this mentor... This link opens in a new window

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Abstract
Namen diplomskega dela je ugotoviti kombinacije ekoloških dejavnikov, ki vplivajo na pojav mladja in ugotoviti njegovo strukturo in dinamiko. Raziskave so potekale v visokogorskem dinarskem jelovo-bukovem pragozdnem rezervatu Lom v Bosni in Hercegovini, za katerega so značilne majhne gostote rastlinojede divjadi in v preteklosti manj izraženi škodljivi vplivi onesnaženosti ozračja. Terensko zbiranje podatkov je potekalo leta 2010, kjer smo na površini 15 ha postavili mrežo 150 raziskovalnih ploskev. Ocenili smo deleže zastiranj pritalne vegetacije, v ustrezen višinski razred smo beležili vse primerke drevesnih vrst, pozorni smo bili tudi na mesto njihovega pojava. Na sredini vsake ploskve smo izmerili vrednosti relativnega svetlobnega sevanja. Povprečna vrednost za direktno sevanje je znašala 5,5 %, za difuzno svetlobno sevanje pa 5,4 %. Gostota klic je v Lomu znašala 2,2 m-2, mladja pa 2,0 m-2. Ugotovili smo pozitiven vpliv velikih lesnih ostankov na pojav klic iglavcev in primerkov smreke do 20 cm višine. V višinskem razredu do 20 cm s 76 % prevladuje jelka, katere delež z naraščanjem višine upada, povečuje pa se delež bukve, ki v razredu nad 250 cm višine zavzema 72 %. Večje jakosti difuznega sevanja so pozitivno vplivale na pojav klic jelke in nižjega bukovega mladja. Ugotovili smo, da se jelka nemoteno pomlajuje in zadovoljivo vrašča v višje debelinske razrede, kar zagotavlja stabilnost sestoja, in potrdili domnevo o veliki dinamiki jelovo-bukovih gozdov.

Language:Slovenian
Keywords:pragozd, pomlajevanje, ekologija pomlajevanja, struktura mladja, lastnosti mladja, bela jelka, medsebojno nadomeščanje, svetlobno sevanje, Lom
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2015
Publisher:[J. Milosavljević]
Number of pages:VII, 64 str.
UDC:630*18:630*22(497.15Lom)(043.2)=163.6
COBISS.SI-ID:4059046 This link opens in a new window
Views:331
Downloads:114
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Secondary language

Language:English
Title:Regeneration ecology of old-growth forest Lom in Bosnia and Herzegovina
Abstract:
The purpose of our research was to investigate influence of ecological factors on regeneration occurrence with special references to its structural characteristics and dynamics. We studied mixed old-growth Fagus-Abies-Picea forest reserve of Lom in the Dinaric Mountains of Bosnia and Herzegovina. Forest is characterized by low densities of ungulates and less air pollution in the past. We carried out the investigation in 2010 when the grid of 150 research plots was established on a surface of 15 ha. On each plot the coverage of tree regeneration and ground vegetation, regeneration density in different height classes were recorded with special emphasis on the spatial pattern of its occurrence. Relative diffuse and direct radiation was estimated using digital hemispherical photographs. Average direct radiation value was 5,5 % and diffuse radiation value 5,4 %. The average total one-year-old seedling density in Lom was 2,2 m-2 and regeneration density 2,0 m-2, respectively. There was a significant relationship between coarse woody debris coverage and occurrence of conifer one-year-old seedlings, and smaller spruce seedlings. The abundance of fir regeneration was the highest within the small seedling class (h < 20 cm) amounting 76 %. The amount of fir decreased with increasing tree height. However, in the height class 20-250 cm, the beech seedlings with 72 % dominated. The highest density of fir one-year-old seedlings and smaller beech seedlings appeared on micro-sites, where higher values of direct radiation are present. Analyses suggested that fir regenerates continuously and recruits successfully into larger height classes which ensures the stability of forest stand and confirms the assumption of the high dynamics in fir-beech forest.

Keywords:old-growth, natural regeneration, regeneration ecology, regeneration composition, seedlings characteristics, reciprocal replacement, silver fir, Lom

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