101. Stanje in spremembe slovenskih gozdov v zadnjih dveh desetletjih - rezultati velikoprostorskega monitoringa gozdovMitja Skudnik, Jernej Jevšenak, Aleš Poljanec, Gal Kušar, 2021, original scientific article Abstract: V prispevku so predstavljeni rezultati velikoprostorskega monitoringa gozdov in gozdnih ekosistemov (MGGE), ki je na sistematični mreži trajnih vzorčnih ploskev (4 km x 4 km) prek celotne Slovenije potekal v letih 2000, 2007, 2012 in 2018. Predstavljeni so osnovni znaki o stanju (lesna zaloga in volumen odmrlih lesnih kosov) in spremembah (prirastek, posek, volumen novih sušic) slovenskih gozdov. Lesna zaloga merskega drevja se je med letoma 2000 in 2012 povečala iz 299 na 334 m3 ha-1. V letu 2018 je bila ocena za povprečno lesno zalogo 330 m3 ha-1. Vzorčna napaka ocene lesne zaloge je znašala od 4 do 5 %. Med letoma 2012 in 2018 se je predvsem zmanjšala lesna zaloga iglavcev, in sicer iz 156 na 144 m3 ha-1. Poglavitni razlog je bil povečan posek, ki je bil posledica številnih ujm in gradacij podlubnikov. Tako se je povečal posek, in sicer iz 4,3 v obdobju 2007/12 na 6.3 m3 ha-1 leto v obdobju 2012/18. K povečanemu poseku večinski delež prispevajo iglavci. V zadnjem obdobju je bil bruto prirastek z vrastjo in prirastkom posekanih dreves ocenjen na 7,9 m3 ha-1 leto. Ocena volumna odmrlih lesnih kosov za leto 2018 je znašala 24 m3 ha-1. V prispevku je podrobno predstavljena tudi metodologija izračunov ocen povprečij na podlagi sistematičnega vzorčenja. Podatki MGGE so bili uporabljeni predvsem za potrebe mednarodnega poročanja o stanju in razvoju slovenskih gozdov ter v omejenem obsegu tudi za nacionalno poročanje o trajnostnem razvoju slovenskih gozdov. Prednost vzpostavljenega sistema je mednarodno usklajena metodologija popisa na sistematični mreži ploskev preko celotne države. Trenutni sistem ima tudi določene omejitve, in sicer malo vzorčnih ploskev, kar vodi v večjo vzorčno napako pri izračunih nekaterih dendrometrijskih kazalnikov. V letu 2020 smo sistem MGGE nadgradili v kontinuiran panelni sistem, katerega osnova bodo nove trajne vzorčne ploskve na neuravnani sistematični mreži gostote 2 km x 2 km, kar je dobro izhodišče za uvedbo Nacionalne gozdne inventure (NGI) v Sloveniji.
Keywords: monitoring gozdov in gozdnih ekosistemov, lesna zaloga, prirastek, mortaliteta, odmrla biomasa, posek, sušice
Published in DiRROS: 12.07.2021; Views: 1289; Downloads: 503
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103. Short-term impacts of harvesting intensity on the upper soil layers in high karst Dinaric fir-beech forestsEmira Hukić, Matjaž Čater, Aleksander Marinšek, Mitja Ferlan, Milan Kobal, Daniel Žlindra, Hamid Čustović, Primož Simončič, 2021, original scientific article Abstract: The present study addresses the short-term effects of different harvest intensities under close-to-nature selective management on the upper soil layers in Slovenian and Bosnian Dinaric karst fir-beech forests. The different harvest intensities coincided with the single-tree and irregular shelterwood management, common in the region. The effect of harvesting intensity on the upper soil layers (Ol, Of, Ol and 0%10 cm mineral soil) was investigated by a repeated measurements experiment in Slovenia on 27 research plots in close-to nature managed forests. The properties of the upper layers (concentration of SOC and TN, C/N ratio, weights, BD and SOC stocks) were analyzed twice, before (2011) and after (2014) treatment of 50% and 100% harvest intensity in relation to the total standing growing stock of trees. As a control, we used no-treatment <20% harvesting intensity plots. To extend this experiment, we added three comparable plots from the Bosnian site: one in an old-growth forest with 0% harvest intensity and two in the managed forest with <20% harvest intensity. The results of the assessment of mean differences indicated a significant influence of harvesting intensity on the decrease in SOC, TN concentrations, weights and SOC stocks in the organic layers and the increase in BD and SOC stocks in the 0%10 cm mineral soil. The highest relative decreases in Ol, Of and Oh SOC stocks occurred in 50% (%10 and %38%) and 100% (%16 and %49%) harvest intensities. Negligible relative differences in both organic and 0%10 cm mineral layers were found for the <20% harvest intensity in the region. The change in forest light conditions resulting from differences in canopy openness as a function of applied harvest intensity explained the significant difference in the properties of the upper soil layers. The impact of the short-term losses in SOC stocks, in terms of overall soil productivity, may depend on the regeneration dynamics and melioration methods.
Keywords: close-to-nature forest management, harvest intensity, Calcic Cambisol, forest soil, soil organic carbon
Published in DiRROS: 10.05.2021; Views: 1081; Downloads: 776
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104. Cold agglutinins and cryoglobulins associate with clinical and laboratory parameters of cold urticariaMojca Bizjak, Mitja Košnik, Dorothea Terhorst, Dejan Dinevski, Marcus Maurer, 2021, original scientific article Abstract: Mast cell-activating signals in cold urticaria are not yet well defined and are likely to be heterogeneous. Cold agglutinins and cryoglobulins have been described as factors possibly associated with cold urticaria, but their relevance has not been explained. We performed a single-center prospective cohort study of 35 cold urticaria patients. Cold agglutinin and cryoglobulin test results, demographics, detailed history data, cold stimulation test results, complete blood count values, C-reactive protein, total immunoglobulin E levels, and basal serum tryptase levels were analyzed. Forty six percent (n = 16) of 35 tested patients had a positive cold agglutinin test and 27% (n = 9) of 33 tested patients had a positive cryoglobulin test. Cold agglutinin positive patients, when compared to cold agglutinin negative ones, were mainly female (P = 0.030). No gender-association was found for cryoglobulins. A positive cold agglutinin test, but not a positive cryoglobulin test, was associated with a higher rate of reactions triggered by cold ambient air (P = 0.009) or immersion in cold water (P = 0.041), and aggravated by increased summer humidity (P = 0.007). Additionally, patients with a positive cold agglutinin test had a higher frequency of angioedema triggered by ingestion of cold foods or drinks (P = 0.043), and lower disease control based on Urticaria Control Test (P = 0.023). Cold agglutinin levels correlated with erythrocyte counts (r = -0.372, P = 0.028) and monocyte counts (r = -0.425, P = 0.011). Cryoglobulin concentrations correlated with basal serum tryptase levels (r = 0.733, P = 0.025) and cold urticaria duration (r = 0.683, P = 0.042). Results of our study suggest that cold agglutinins and cryoglobulins, in a subpopulation of cold urticaria patients, are linked to the course and possibly the pathogenesis of their disease.
Keywords: urticaria, mast cells, cold-induced urticaria, cold urticaria, cryoglobulins, cold agglutinin, degranulation, clinical parameters, laboratory parameters
Published in DiRROS: 10.05.2021; Views: 1332; Downloads: 1113
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105. Severe cold urticaria can point to an underlying clonal mast cell disorderMojca Bizjak, Marcus Maurer, Mitja Košnik, Dorothea Terhorst, Samo Zver, Thomas Burmeister, Frank Siebenhaar, 2021, short scientific article Keywords: urticaria, cold urticaria, wheals, clonal mast cell disorder
Published in DiRROS: 10.05.2021; Views: 1131; Downloads: 338
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107. Incidents in molecular pathology : frequency and causes during routine testingCleo Keppens, Yann Van Royen, Anne Brysse, Sophie Cotteret, Estrid Høgdall, Tine Plato Kuhlmann, Brendan O'Sullivan, Patrick Pauwels, Siegrid Pauwels, Mitja Rot, 2021, original scientific article Keywords: pathology, hospital laboratories, laboratory techniques and procedures, diagnostic errors, molecular pathology
Published in DiRROS: 10.03.2021; Views: 1054; Downloads: 275
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109. Sistem opredelitve rabe tal na ploskvah nacionalne gozdne inventure 2021 (gozd/drugo gozdni zemljišče/negozd) : spletni uvajalni seminar za sodelavce GIS, ki bodo interpretirali ploskve drugega panela Nacionalne gozdne inventure na mreži 2 km x 2 km preko Slovenije, 10. - 11. 2. 2021Anže Martin Pintar, Špela Planinšek, Mitja Skudnik, 2021, other performed works Keywords: nacionalna gozdna inventura, definicija gozda, raba zemljišč, gozdovi, negozd, druge gozdne površine
Published in DiRROS: 05.03.2021; Views: 1514; Downloads: 0 |
110. Nrf2-interacting nutrients and COVID-19 : time for research to develop adaptation strategiesJean Bousquet, Jean-Paul Cristol, Wienczyslawa Czarlewski, Josep M. Antò i Boquè, Adrian Martineau, Tari Haahtela, Susana C. Fonseca, Guido Iaccarino, Hubert Blain, Alessandro Fiocchi, Nisera Bajrović, Natalija Edelbaher, Maja Jošt, Peter Kopač, Anja Koren, Mitja Košnik, Karmen Kramer Vrščaj, Samo Kreft, Nika Lalek, Bojan Madjar, Tonka Poplas-Susič, Irma Rozman Sinur, Tanja Soklič, Katja Triller Vadnal, Nadja Triller, Jure Urbančič, Mihaela Zidarn, 2020, review article Abstract: There are large between- and within-country variations in COVID-19 death rates. Some very low death rate settings such as Eastern Asia, Central Europe, the Balkans and Africa have a common feature of eating large quantities of fermented foods whose intake is associated with the activation of the Nrf2 (Nuclear factor (erythroid-derived 2)-like 2) anti-oxidant transcription factor. There are many Nrf2-interacting nutrients (berberine, curcumin, epigallocatechin gallate, genistein, quercetin, resveratrol, sulforaphane) that all act similarly to reduce insulin resistance, endothelial damage, lung injury and cytokine storm. They also act on the same mechanisms (mTOR: Mammalian target of rapamycin, PPAR[gamma]:Peroxisome proliferator-activated receptor, NF[kappa]B: Nuclear factor kappa B, ERK: Extracellular signal-regulated kinases and eIF2[alpha]:Elongation initiation factor 2[alpha]). They may as a result be important in mitigating the severity of COVID-19, acting through the endoplasmic reticulum stress or ACE-Angiotensin-II-AT1R axis (AT1R) pathway. Many Nrf2-interacting nutrients are also interacting with TRPA1 and/or TRPV1. Interestingly, geographical areas with very low COVID-19 mortality are those with the lowest prevalence of obesity (Sub-Saharan Africa and Asia). It is tempting to propose that Nrf2-interacting foods and nutrients can re-balance insulin resistance and have a significant effect on COVID-19 severity. It is therefore possible that the intake of these foods may restore an optimal natural balance for the Nrf2 pathway and may be of interest in the mitigation of COVID-19 severity.
Keywords: Covid-19, SARS-CoV-2, food, insulin resistance, obesity, Nrf2, nutrients, TRPA1
Published in DiRROS: 25.01.2021; Views: 1636; Downloads: 633
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