Dendroclimatic study of a mixed spruce-fir-beech forest in the Czech Republic: Dendroklimatološka študija mešanega smrekovo-jelovo-bukovega gozda v Češki republiki | Dendroklimatološka študija mešanega smrekovo-jelovo-bukovega gozda v Češki republiki: Dendroclimatic study of a mixed spruce-fir-beech forest in the Czech Republic
2020
Kolář, Tomáš | Čermák, Petr | Trnka, Miroslav | Koňasová, Eva | Sochová, Irena | Rybníček, Michal
English. European forests are undergoing an important transition due to the current climate change, as monocultures are being gradually replaced by mixed forests. Understanding tree growth in mixed forests under a changing climate is challenging because of tree species’ adaptation and long-term forest planning. In this study, we evaluate the long-term behaviour of Norway spruce (Picea abies), silver fir (Abies alba) and European beech (Fagus sylvatica) from a low montane range at the Czech-Austrian border. Species-specific tree-ring width chronologies have revealed significantly decreasing growth trends since the 2000s. Temporally unstable climate–growth relationships showed an increasing negative effect of current growing season drought on spruce growth and a positive effect of dormant season temperature on fir and beech growth. Our results suggest that though species’ response to climate change differs in the mixed forest, growth reduction in the last years has been proved for all species, likely due to frequent climate extremes.
Show more [+] Less [-]Slovenian. Evropski gozdovi doživljajo pomembne spremembe zaradi trenutnih podnebnih dogajanj, ko monokulture postopoma nadomeščajo mešani gozdovi. Razumevanje, kako rastejo drevesa v mešanih gozdovih v spreminjajočem se podnebju, je izziv zaradi njihovih prilagoditev in dolgoročnega gozdnogospodarskega načrtovanja. V tej raziskavi smo ovrednotili dolgoročno obnašanje navadne smreke (Picea abies), bele jelke (Abies alba) in navadne bukve (Fagus sylvatica) iz nizkega montanskega pasu na češko-avstrijski meji. Kronologije širin branik za posamezne drevesne vrste od leta 2000 izkazujejo negativne trende rasti. Časovno nestabilne odvisnosti rasti od klime so pokazale naraščajoč negativni vpliv suše med tekočo rastno sezono na rast smreke in pozitiven učinek temperatur v obdobju mirovanja na rast jelke in bukve. Naši rezultati kažejo, da čeprav se odzivnost na podnebne spremembe razlikuje med posameznimi vrstami v mešanem gozdu, je bilo v zadnjih letih dokazano zmanjšanje rasti za vse vrste, najverjetneje zaradi pogostih izjemnih vremenskih dogodkov.
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