20.500.12556/RUL-140868 Vpliv gozdne mikroklime na sukcesijski razvoj pritalne vegetacije v eksperimentalnih sestojnih vrzelih The effect of forest microclimate on succession of ground vegetation within canopy gaps Antropogeni visokogorski gozdovi se zaradi sukcesijskih stadijev z bujno zeliščno plastjo in slabo razkrojenega organskega dela tal težko pomlajujejo. Pod Veliko Kopo je bilo v šestih vrzelih s premerom dveh drevesnih višin postavljenih 252 ploskvic velikosti 1 × 1 m, ki so bile znotraj vsake vrzeli razdeljene na šest položajev (na štiri smeri neba, center vrzeli in pod sklenjenim sestojem). Ploskvice so bile treh vrst: naključno postavljene, s prisotnim mladjem in s prekopanim vrhnjim slojem tal. Tri od šestih vrzeli so bile ograjene. V nalogi so bile preučevane razlike v ekoloških dejavnikih (svetlobi, temperaturi, zračni in talni vlagi) in strukturi vegetacije med vrzelmi in med položaji znotraj vrzeli. Rezultati kažejo, da se ekološki dejavniki in zmes zeliščne vegetacije po vrzelih in posameznih položajih razlikujejo. Rod šašuljic je bil v zeliščni plasti najmočneje zastopan in je najmočneje zastiral tla v centru vrzeli (Me = 41,3 %), kamor prispe največ svetlobe. Največje zastiranje mladja je bilo pod sestojem. Zastiranje šašuljic in mladja je bilo v šibki negativni korelaciji (rho = - 0,27). Pritalna vegetacije je v sukcesiji nastopila hitro in močno, zato naj bo odpiranje sestojev postopno. Ellenbergove fitoindikacijske vrednosti niso odražale realnih rastiščnih razmer. Anthropogenic high mountain forests are difficult to rejuvenate due to successional stages with a lush herbaceous layer and poorly decomposed soil organic matter. Below Velika Kopa, 252 1 × 1 m plots were placed in six gaps with a diameter of two tree heights, divided into six positions within each gap (four in the cardinal directions, one in the centre and one under the closed canopy). The plots were of three types: randomly placed, with present seedlings and with topsoil excavated. Three of the six gaps were fenced. The thesis investigated differences in ecological factors (light, temperature, air and soil moisture) and vegetation structure between gaps and between positions within gaps. The results show that ecological factors and herbaceous vegetation mixture vary across gaps and positions. The genus of reed grass was most strongly represented in the herb layer and covered the most area in the centre of the gap (Me = 41.3 %), where the sun radiation was the highest. Seedlings covered the most area in position under the canopy. The reed grass and seedlings coverage were in weak negative correlation (rho = - 0,27). The stands should be opened gradually, due to rapid growth of herbaceous layer. Ellenberg's phytoindication values did not reflect realistic growing conditions. mikroklima vrzel sukcesija ekološki dejavniki pritalna vegetacija microclimate canopy gaps succession ecological factor ground vegetation true false false [J. Muršec Pitamic] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-09-21 07:16:09 2022-09-21 07:16:16 2022-09-22 04:10:14 0000-00-00 00:00:00 2022 0 Ljubljana 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*2+630*1(043.2)=163.6 211624 122238211 25893.pdf 25893.pdf 1 D9B1E20D14BB4EE7AE72D7F21103F1D6 bd12c12ede88b25c2f875120a1fb0cfe9a8b3d592bbbd90e091ead4338eb4860 7004bd40-396c-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=161691 Biotehniška fakulteta 0 0 0