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Abstract: Na raziskovalnih ploskvah, ki ležijo na nekdanjih novinah na območju katastrske občine Koprivna, smo v septembru leta 2017 opravili šesto zaporedno polno izmero. Gozdovi na raziskovalnih ploskvah so v zasebni lasti in na njih od vzpostavitve le-teh v letu 1960 niso gospodarili. V naravnem sukcesijskem razvoju, ki se je začel pred 70 oziroma 100 leti, je na ploskvah prevladala smreka, spreminjanje sestojnih gostot bi lahko primerjali z Reinekejevem pravilom (SDI) o gostoti sestojev in samoizločanju dreves. Na raziskovalnih ploskvah se lesna zaloga giblje od 566,4 m3/ha do 761,3 m3/ha, temeljnica pa od 48,7 m2/ha do 61,7 m2/ha. Opazili smo skokovito povečanje višinskih krivulj smreke in macesna v sestojih. V neredčenih sestojih prevladujejo drevesa z visokimi neugodnimi vrednostmi dimenzijskega razmerja h/d.
Keywords: novinarjenje, raziskovalne ploskve, gozdovi na opuščenih kmetijskih površinah, sukcesijski razvoj
Published in DiRROS: 29.11.2019; Views: 6704; Downloads: 2106
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Abstract: The herbaceous understory represents a key component of forest biodiversity across temperate forests of Europe. Here, we quantified changes in the diversity and composition of the forest understory layer in representative Slovenian forest ecosystems between 2004/05 and 2014/15. In total, 60 plots were placed across 10 different managed forest types, ranging from lowland deciduous and mid-altitude mesic mixed forests to mountain conifer forests. This network is part of an international network of sites launched within the ICP Forests Programme aimed to assess the condition of forests in Europe. To examine how disturbance influenced understory dynamics, we estimated the disturbance impacts considering both natural and/or anthropogenic disturbances that cause significant damage to trees and to ground-surface layers, including ground-vegetation layers and upper-soil layers. Species richness across 10 sites (gamma diversity) significantly decreased from 272 to 243 species during the study period, while mean species richness per site did not significantly change. The mean value of site level Shannon diversity indices and evenness significantly increased. The cover of most common plant species increased during the monitoring period. The mean value of disturbance estimates per site increased from 0.8% in 2004/05 (ranging from 0% to 2.5%) to 16.3% in 2014/15 (ranging from 5.0% to 38.8%), which corresponded to a reduction in total vegetation cover, including tree-layer cover. More disturbed sites showed larger temporal changes in species composition compared to less disturbed sites, suggesting that forest disturbances caused understory compositional shifts during the study period. Rather than observing an increase in plant diversity due to disturbance, our results suggest a short-term decrease in species number, likely driven by replacement of more specialized species with common species.
Keywords: vegetation dynamics, vascular-plant diversity, understory layer, disturbance, monitoring, temperate forests
Published in DiRROS: 27.11.2019; Views: 2374; Downloads: 1442
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Keywords: ginekologija, onkologija, nacionalni programi, dojke, maternični vrat, nosečnost, ščitnica, endometrij, reproduktivno zdravje, pozne posledice, jajčnik, dedni rak, genetsko svetovanje, Lynchev sindrom, preventivna adneksektomija, intraperitonealna kemoterapija, Sertolijeve celice, intersticijske celice, metastaze, zborniki
Published in DiRROS: 17.09.2019; Views: 2596; Downloads: 917
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Keywords: onkologija, preventivni programi, preventivni zdravstveni pregledi, Evropski kodeks, odvisnosti, telesna aktivnost, prehrana, ultravijolično sevanje, ionizirajoče sevanje, nevarne snovi, dojenje, hormonsko nadomestno zdravljenje, presejanje, vakcinacija, zborniki
Published in DiRROS: 17.09.2019; Views: 2579; Downloads: 806
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Keywords: onkologija, zborniki
Published in DiRROS: 17.09.2019; Views: 2058; Downloads: 464
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