Sestojna dinamika in mortaliteta dreves v pragozdu Pečka

Virant, Tadeja (avtor), Nagel, Thomas Andrew (mentor)

Pragozd Pečka je eden izmed štirinajstih pragozdnih ostankov v Sloveniji. V njih potekajo meritve za raziskave in naloge kot je ta. Pridobljeni podatki zaradi odsotnosti neposrednega človekovega vpliva nudijo kakovosten vir informacij o naravni dinamiki in spremembah v pragozdu. Na trajnih vzorčnih ploskvah se je leta 2019 ponovilo polno premerbo dreves, prvič po letu 2014, začetki meritev pa segajo v leto 1980. Meritve so potekale na treh ploskvah, katerih podatke smo za analizo združili in primerjali z izsledki prejšnjih meritev. Namen naloge je bil prikazati spremembe v drevesni strukturi, vrasti in mortaliteti. Vrstna sestava se je delno spremenila, v letu 2019 sta ostali prisotni zgolj bukev (Fagus sylvatica L.) in jelka (Abies alba Mill.), graditeljici združbe in le 2 osebka gorskega bresta (Ulmus glabra Huds.). Ostale drevesne vrste so prisotne v zanemarljivih deležih. Delež bukve se je tekom let povečeval, njena prevlada se obeta tudi v prihajajočih letih. Stopnja mortalitete je med obdobji spremljanja nihala. Med leti 1980 in 1998 je znašala 1,45 % največ med izbranimi obdobji, med letoma 1998 in 2014 se je drastično zmanjšala na 0,84 %, nato pa se je v zadnjem obdobju, med leti 2014 in 2019 ponovno zvišala na 1,22 %. Do leta 2014 na ploskvah ni bilo zabeleženega novo vraslega drevesa, v dotičnem letu je novo vraslih 595 dreves, leta 2019 zgolj 164, vsa novo vrasla drevesa so predstavljale bukve.

• Jezik: Slovenski jezik
• Ključne besede: Pečka, pragozdovi, smrtnost, vrast, bukev, Fagus Sylvatica L., jelka, Abies alba Mill.
• Vrsta gradiva: Diplomsko delo/naloga
• Tipologija: 2.11 - Diplomsko delo
• Organizacija: BF - Biotehniška fakulteta
• Založnik: [T. Virant]
• Leto izida: 2023
• PID: 20.500.12556/RUL-150973
• UDK: 630*56:630*18(043.2)=163.6
• COBISS.SI-ID: 166013955
• Datum objave v RUL: 26.09.2023

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Stand dynamics and tree mortality in the Pečka old-growth forest

Izvleček

The Pečka Primeval Forest is one of the 14 primeval forest remnants in Slovenia. They are used for measurements for research and tasks such as this. The data obtained provide a good source of information on the natural dynamics and changes in the primeval forest, due to the absence of direct human influence. In 2019, a full tree census was repeated in the permanent sample plots, the first time since 2014, and the measurements date back to 1980. The measurements were carried out in three plots, the data from which were pooled for analysis and compared with the results of the previous measurements. The aim was to show changes in tree structure, growth and mortality. The species composition has partially changed, with only beech (Fagus sylvatica L.) and silver fir (Abies alba Mill.), the builders of the community, and only 2 specimens of mountain elm (Ulmus glabra Huds.) remaining in 2019. The other tree species are present in negligible proportions. The proportion of beech has been increasing over the years and its dominance is expected to continue in the coming years. The mortality rate fluctuates between monitoring periods. Between 1980 and 1998, it is 1.45 %, the highest of the three periods, decreasing drastically to 0.84 % between 1998 and 2014, before rising again to 1.22 % in the most recent period, between 2014 and 2019. Until 2014, no new trees were recorded in the plots, 595 trees were new in that year, and only 164 in 2019, all of the new trees were beech.

• Ključne besede: Pečka, old-growth forest, recruitment, mortality, European beech, Fagus sylvatica L., silver fir, Abies alba Mill.