Spremembe svetlobih razmer in pritalne vegetacije na območju gozdnega roba bukovih gozdov

Bratun, Primož (author), Kobal, Milan (mentor), Rozman, Andrej (comentor)

V magistrski nalogi je preučevano spreminjanje svetlobnih razmer in pritalne vegetacije na gozdnem robu bukovih združb Blechno-Fagetum in Hacquetio-Fagetum. Raziskava je bila izvedena v krajinah Janč in Kočevskega roga. V vsaki krajini so bili preučeni 4 transekti. Transekt je sestavljalo 6 ploskev, ki so bile nanizane iz travnika (2) v notranjost gozda (4) na skupni razdalji 80 m. Na vseh ploskvah so bile opraviljene fotografije hemisfere ter izračunani deleži direktne in difuzne svetlobe. Deleži svetlobe so se gibali med 0,999 na travniku in 0,065 v gozdu. Na ploskvah v gozdovih so bili opravljeni fitocenološki popisi. Ugotovljene so bile statistično značilne razlike deležev svetlobe med ploskvami, nenaden upad deležev svetlobe ob prehodu iz travnika v gozd in večja variabilnost deležev direktne svetlobe. Spreminjanje števila vrst in Shannonovega indeksa biotske pestrosti z oddaljevanjem od gozdnega roba v notranjost gozda ni bilo statistično značilno. Ellenbergove fitoindikacijske vrednosti so pokazale razlike med krajinama v kisloljubnosti vrst. Klasifikacija popisov z dendrogramom je pokazala značilne razlike med krajinama vendar ni pokazala podobnosti ploskev z isto oddaljenostjo od gozdnega roba. Ellenbergove fitoindikacijske vrednosti svetlobe niso bile statistično značilno odvisne od izmerjenih deležev svetlobe. Ravno tako ni bila ugotovljena statistično značilna povezava med vrstno pestrostjo in deleži svetlobe ter Shannonovim indeksom in deleži svetlobe. Podatki o svetlobi in pritalni vegetaciji niso nakazovali pasu postopnega spreminjanja –ekotona.

• Language: Slovenian
• Keywords: gozdni rob, robni učinek, ekoton, krajina, difuzna svetloba, direktna svetloba, pritalna vegetacija, biotska pestrost
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [P. Bratun]
• Year: 2017
• PID: 20.500.12556/RUL-95734
• UDC: 630*18:630*17:630*11(043.2)=163.6
• COBISS.SI-ID: 4872102
• Publication date in RUL: 21.09.2017

Secondary language

• Language: English
• Title: Changes of light conditions and understorey vegetation in beech forest edge area

Abstract

Changes of light conditions and understory vegetation were studied on forest edge in two common beech associations Blechno-Fagetum and Hacquetio-Fagetum on a landscape scale in southern part of Kočevski rog and western part of Posavsko hribovje, Slovenia. There were 4 transects measured in each landscape. Each 80 m transect consisted of 6 plots ranging from grassland into forest interior. Hemispherical photographs were taken on each plot and vegetation inventory was performed on forest plots. Light proportions on plots varied from 0, 999 (grassland plot) to 0, 065 (forest interior plot) and light proportions of plots with same distance to forest edge were statistically different. There was a decrease of light proportions between grassland plots and first forest plot. There was no decrease observed in species richness or Shannon diversity among plots. Notable difference between landscapes was observed by dendrogram analysis. There was no significant correlation between Ellenberg indicator light values and measured light proportions neither the correlation between vegetation species richness and measured light proportions. There were no changes of light conditions or understory vegetation that would indicate the ecotone transition zone.

• Keywords: forest edge effect, ecotone, landscape, diffuse light, direct light, understory vegetation, biodiversity