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4. No future growth enhancement expected at the Northern edge for European beech due to continued water limitationStefan Klesse, Richard Peters, Raquel Alfaro-Sánchez, Vincent Badeau, Claudia Baittinger, Katarina Čufar, Jožica Gričar, Maks Merela, Peter Prislan, Tom Levanič, 2024, original scientific article Abstract: With ongoing global warming, increasing water deficits promote physiological stress on forest ecosystems with negative impacts on tree growth, vitality, and survival. How individual tree species will react to increased drought stress is therefore a key research question to address for carbon accounting and the development of climate change mitigation strategies. Recent tree-ring studies have shown that trees at higher latitudes will benefit from warmer temperatures, yet this is likely highly species-dependent and less well-known for more temperate tree species. Using a unique pan-European tree-ring network of 26,430 European beech (Fagus sylvatica L.) trees from 2118 sites, we applied a linear mixed-effects modeling framework to (i) explain variation in climate-dependent growth and (ii) project growth for the near future (2021–2050) across the entire distribution of beech. We modeled the spatial pattern of radial growth responses to annually varying climate as a function of mean climate conditions (mean annual temperature, mean annual climatic water balance, and continentality). Over the calibration period (1952–2011), the model yielded high regional explanatory power (R2 = 0.38–0.72). Considering a moderate climate change scenario (CMIP6 SSP2-4.5), beech growth is projected to decrease in the future across most of its distribution range. In particular, projected growth decreases by 12%–18% (interquartile range) in northwestern Central Europe and by 11%–21% in the Mediterranean region. In contrast, climate-driven growth increases are limited to around 13% of the current occurrence, where the historical mean annual temperature was below ~6°C. More specifically, the model predicts a 3%–24% growth increase in the high-elevation clusters of the Alps and Carpathian Arc. Notably, we find little potential for future growth increases (−10 to +2%) at the poleward leading edge in southern Scandinavia. Because in this region beech growth is found to be primarily water-limited, a northward shift in its distributional range will be constrained by water availability.
Keywords: climate change, climate sensitivity, drought, Fagus sylvatica, growth projection, leading edge, trailing edge, tree rings
Published in DiRROS: 10.02.2025; Views: 222; Downloads: 134
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5. Letna in sezonska debelinska rast dreves na ploskvah intenzivnega monitoringa v SlovenijiTom Levanič, Matej Rupel, Andreja Vedenik, 2024, original scientific article Abstract: V okviru intenzivnega monitoringa gozdnih ekosistemov že od leta 2009 s pomočjo ročnih dendrometrov spremljamo de- belinsko priraščanje dreves na letnem nivoju. Gre za dopolnilni podatek o debelinskem priraščanju dreves, ki ga pridobimo v okviru petletnih inventur na ploskvah intenzivnega monitoringa. Letno dinamiko debelinskega priraščanja spremljamo z dvema tipoma ročnih dendrometrov : plastičnimi, nemškega proizvajalca, in nerjavnimi, češkega proizvajalca. S spremljanjem debelinske rasti z ročnimi dendrometri želimo ugotoviti vpliv okoljskih in podnebnih dejavnikov na rast dreves med dvema petletnima inventurama. Tako dobimo bistveno boljše podatke o stanju priraščanja dreves kot s petletnimi inventurami, kjer ekstremni dogodki izginejo v povprečju. V letu 2022 smo dodatno na vse ploskve namestili tudi elektronske dendrometre z visoko frekvenco spremljanja spreminjanja debelinskega prirastka na ploskvah intenzivnega monitoringa v Sloveniji. Z njimi želimo ugotoviti vplive okoljskih in podnebnih dejavnikov na znotraj sezonsko dinamiko debelinskega priraščanja. To je ključno za razumevanje vpliva negativnih podnebnih dejavnikov na debelinsko priraščanje dreves.
Keywords: podnebne spremembe, bukev, Fagus sylvatica, dob, Quercus robur, smreka, Picea abies, ročni dendrometer, elektronski dendrometer
Published in DiRROS: 06.12.2024; Views: 339; Downloads: 84
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6. Predlog metodologije za spremljanje stanja gozdov za l. 2025 : predlog metodologije v skladu s Pravilnikom o varstvu gozdov (2009) in mednarodnimi zavezami (Konvencija UNECE CLRTAP)Daniel Žlindra, Lado Kutnar, Tom Levanič, Anže Martin Pintar, Urša Vilhar, Primož Simončič, 2024, treatise, preliminary study, study Keywords: monitoring, stanje gozdov, osutost dreves, poškodovanost dreves, rast dreves, meteorološke meritve, ozon, pritalna vegetacija, fenološka opazovanja, foliarni popis, zračne usedline
Published in DiRROS: 12.11.2024; Views: 360; Downloads: 0
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7. Climate growth limitations of European beech and silver fir along the Carpathian arc – the recent state and future prospectsJakub Kašpar, Kamil Král, Tom Levanič, Pia Caroline Adamič, Matjaž Čater, 2024, published scientific conference contribution abstract Keywords: climate-growth limitation, VS model, Carpathians, climate change, silver fir, European beech
Published in DiRROS: 03.09.2024; Views: 522; Downloads: 287
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9. Poročilo o spremljanju stanja gozdov za leto 2023 : vsebinsko poročilo o spremljanju stanja gozdov v skladu s Pravilnikom o varstvu gozdov (2009)Andrej Grah, Janez Kermavnar, Nike Krajnc, Lado Kutnar, Tom Levanič, Nikica Ogris, Anže Martin Pintar, Matej Rupel, Mitja Skudnik, Primož Simončič, Saša Šercer, Urša Vilhar, Daniel Žlindra, 2024, final research report Keywords: varstvo gozdov, monitoring, stanje gozdov, zdravstveno stanje krošenj, popis povzročiteljev poškodb, meteorološke meritve, osutost dreves, poročila, Slovenija
Published in DiRROS: 02.07.2024; Views: 622; Downloads: 695
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10. Holocene climate variability in Slovenia : a reviewMatej Lipar, Sonja Lojen, Mateja Breg Valjavec, Maja Andrič, Andrej Šmuc, Tom Levanič, Jure Tičar, Matija Zorn, Mateja Ferk, 2024, review article Keywords: palaeoclimate, climate proxy, glaciers, pollen, tree-rings, sediment, speleothems, historical data
Published in DiRROS: 21.06.2024; Views: 675; Downloads: 293
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