Spremljanje semenenja in preživetja klic v jelovo-bukovih pragozdovih

Zupančič, Erik (author), Nagel, Thomas Andrew (mentor)

Raziskava je potekala v treh pragozdnih rezervatih Šumik, Pečka in Rajhenavski Rog. V vsakega od pragozdov smo postavili 20 objektov, vsak objekt pa je bil sestavljen iz semenske pasti, iz kletke proti objedanju divjadi in kontrolne ploskve. Ugotovili smo, da je v rezervatu Šumik v kletkah preživelo 10 % več osebkov kakor izven nje. Preživetje jelke je bilo za 30 % boljše v kletkah kakor na kontrolnih ploskvah. V Pečki smo našteli največjo gostoto bukovih klic. V kletkah proti objedanju je preživelo 13 % vsega spremljanega mladja v času študije, kar je za 4 % manj kakor na kontrolnih ploskvah. Tudi preživetje jelke je bilo za 5 % slabše v kletkah kakor na kontrolnih ploskvah, kjer je preživelo 40 % vseh spremljanih jelk. V pragozdu Rajhenavski Rog smo našteli največ javorovega in jelovega semena. V kletkah proti objedanju je preživelo za 16 % vsega mladja oz. klic kar je za 6 % več kot na kontrolni ploskvi. Delež jelke, ki je preživela, je bil višji v kletkah in sicer za 8 %. Ugotovljena je bila negativna povezava med preživetjem v kletkah kakor izven njih. Ugotovili smo, da imajo na pomlajevanje in preživetje klic močen negativen vpliv manjši plenilci listja kot so polži in suša.

• Language: Slovenian
• Keywords: semenenje, pomlajevanje, preživetje klic, pragozdovi
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [E. Zupančič]
• Year: 2023
• PID: 20.500.12556/RUL-146981
• UDC: 630*2(043.2)=163.6
• COBISS.SI-ID: 156008451
• Publication date in RUL: 18.06.2023

Secondary language

• Language: English
• Title: Seed production and seedling survival in old-growth fir-beech forests

Abstract

The study examined seed production and seedling survival in three virgin forest reserves - Šumik, Pečka and Rajhenavski Rog. In each of the primeval forests 20 objects were placed, each object consisting of a seed trap, a deer exclosure plot, and a control plot. In Šumik, we found that 10% more individuals survived in the cages than in control plots, and there was 30% higher survival of fir in the cages than in the control plots. In Pečka, we found the highest density of beech one year old seedlings. In the deer exclosure plots, 13% of all monitored seedlings survived until the end of the study, which is 4% less than in the control plots. Survival of fir trees was also 5% lower in the cages than in the control plots, where 40% of all monitored fir trees survived. In Rajhenavski Rog, we counted the most maple and fir seeds. In the deer exclosures, 16% of all one year old seedlings survived, which was 6% more than in the control plot. The percentage of fir survivors was 8% higher in the cages. Over all reserves, there was higher survival in the exclosures compared to control plots, except Pečka. We found that mortality agents, such as snails and drought, had a strong negative effect on regeneration survival.

• Keywords: seed production. regeneration, seedling survival, virgin forests