Razvoj sestojev v pragozdnem rezervatu Ravna gora

diplomsko delo - visokošolski strokovni študij - 1. stopnja

Pavel Hosta (Avtor), Dušan Roženbergar (Mentor)

Povzetek

Raziskave v pragozdovih se izvajajo z namenom boljšega razumevanja delovanja in razvoja gozda. V pragozdnem rezervatu Ravna gora so se meritve in raziskave intenzivneje začele v letu 1983, po vetrolomu. Vzpostavljeni sta bili dve stalni raziskovalni ploskvi, ena na neprizadetem delu, druga pa na delu, opustošenem od vetroloma. Prvi popis so izvedli leta 1983. Takrat so izvedli polno premerbo na ploskvi, vsem drevesom so določili status živo/mrtvo in vzrok smrti. Popisi so potekali nato v letih 2012, 2017 in 2022. Na neprizadeti ploskvi je razvoj potekal enakomerno, brez izrazitih ekstremov. V drevesni sestavi je prevladovala bukev s 93,2 %, gorski javor s 6,8 %, število osebkov na ha se je rahlo zmanjšalo iz 292 na 205, smrtnost je bila med 0,9 % in 1,1 %, vrast med 0,2 % in 0 %. Na ploskvi 2, prizadeti od vetroloma je v gostoti najprej prevladoval gorski javor, kasneje pa je prevladala bukev, v 2022 je bila gostota bukve 61,3 %. Po vetrolomu je vrednost temeljnice močno naraščala iz 3,86 m2/ha na zdajšnjih 16,65 m2/ha. Stopnja smrtnosti je naraščala, stopnja vrasti pa padala. Stopnja vrasti je bila po vetrolomu kar 4,6 %. Kot pričakovano se na ploskvi 1 sestojne razmere niso bistveno spremenile, prav tako pa je bil z veliko spremembo v drevesni sestavi pričakovan tudi razvoj na ploskvi 2. S tem smo potrdili postavljeni hipotezi.

Ključne besede

pragozd;Ravna gora;razvoj;bukev;javor;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2024
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL BF - Biotehniška fakulteta
Založnik:	[P. Hosta]
UDK:	630*22(497.4Ravna gora)(043.2)=163.6
COBISS:	194148611
Št. ogledov:	23
Št. prenosov:	1
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Stand development in old-growth forest reserve Ravna gora
Sekundarni povzetek:	Research in forests provides valuable insight into the functioning and development of natural forest. In the Ravna gora old-growth forest reserve, long term research was initiated following the 1983 windbreak. Two permanent research plots were established, one in the unaffected part and the other in the area damaged by the windbreak. The first measurement took place in 1983, when a full callipering was carried out on the plot, all trees were given a live/dead status and cause of death was estimated. Repeat censuses were then carried out in 2012, 2017 and 2022. On the unaffected area of the reserve, development was moderate, without significant changes. Beech dominated with 93.2 %, mountain maple with 6.8 %, density slightly decreased from 292 to 205, the mortality rate was between 0.9 % and 1.1 %, and the recruitment rate was between 0.2 % and 0 %. On the windbreak plot, there was first a predominance of mountain maple over beech, but later the density of beech increased, making up 61.3 % of trees in 2022. After the windbreak, the value of the basal area increased sharply from 3.86 m2/ha to the current 16.65 m2/ha. Following windthrow, the mortality rate was rising, and the recruitment rate was falling as the forest developed over time. The recruitment rate was as much as 4.6 % after windthrow. As expected, development on the first plot had minor changes, while large changes were observed in structure and composition in the windthrow plot, confirming our hypotheses.
Sekundarne ključne besede:	old – growth forest;Ravna gora;mortality;beech;acer;
Vrsta dela (COBISS):	Diplomsko delo/naloga
Študijski program:	0
Komentar na gradivo:	Univ. v Ljubljani, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire
Strani:	1 spletni vir (1 datoteka PDF (X, 48 str., [2] str. pril.))
ID:	23538403