Romanian Forest Database: a phytosociological archive                     of woody vegetation

Indreica, Adrian; Turtureanu, Pavel Dan; Szabó, Anna; Irimia, Irina

doi:10.1127/phyto/2017/0201

Cited by 10 publications

(12 citation statements)

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“…C. betulus and T. tomentosa group somewhat in between beech and oak in the DCA; they characterise stands where neither beech nor oak species achieved dominance. Our vegetation gradient reflects the typical altitudinal zonation of forest communities in Romanian mountains, in which the thermophilic oak forest zone is replaced upslope by the mixed oak-hornbeam and beech-hornbeam zone, which finally gives way to the mesic beech forest zone (Coldea et al, 2015;Doniță, 1992;Indreica et al, 2017). T. tomentosa as a species of the south-east European flora plays an important role in the forests of the study region.…”

Section: The Beech-oak Forest Ecotone Is Associated With a Shift From Mesic To Thermophilic Tree Speciesmentioning

confidence: 61%

“…Earlier studies of forest structure and community composition in the western Romanian study region have shown that the beech forests are in many structural aspects very similar to Central European beech forests of the Galio-Fagion, and the oak-rich forests resemble Central European communities of the Quercetalia pubescenti-petraeae (thermophilic mixed oak forests) and Carpinetalia betuli (oak-hornbeam forests), despite the admixture of additional tree species with sub-Mediterranean and southeast European origin (Heinrichs et al, 2016;Indreica et al, 2017Indreica et al, , 2019Walentowski et al, 2015). The forest inventory and soil chemical data show that the three transects are located on mesic to eutric soils, and they are more or less comparable amongst the transects.…”

Section: Climatic Conditions Across the Beech-oak Ecotonementioning

confidence: 99%

“…The region may therefore be used as a natural laboratory for studying beech and oak forests in the natural transition zone between the two species under a warmer climate. Mesic beech forests occur in western Romania in a humid climate at elevations above 500/600 m a.s.l., and beech is gradually replaced by mesic mixed beech-hornbeam and hornbeam-oak forests and finally thermophilic oak forests with decreasing elevation towards the colline belt (< 300/400 m; Coldea et al, 2015;Doniță, 1992;Indreica et al, 2017). While the beech forest climate is similar to that in southern Germany today, the climate of the oak forest zone reflects the projected warmer and drier climate in central and southern Germany in 2070/2100 according to the most probable climate change scenarios.…”

Section: Introductionmentioning

confidence: 99%

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Climate warming-induced replacement of mesic beech by thermophilic oak forests will reduce the carbon storage potential in aboveground biomass and soil

Kasper

Weigel

Walentowski

et al. 2021

Annals of Forest Science

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Key message Climate-warming related replacement of beech by oak forests in the course of natural forest succession or silvicultural decisions may considerably reduce ecosystem carbon storage of central European woodlands. Context Climate warming may change the carbon (C) storage in forest biomass and soil through future shifts in tree species composition. With a projected warming by 2–3 K over the twenty-first century, silvicultural adaptation measures and natural succession might lead to the replacement of European beech forests by thermophilic oak forests in drought- and heat-affected regions of central and south-eastern Europe, but the consequences for ecosystem C storage of this species shift are not clear. Aims To quantify the change in C storage in biomass and soil with a shift from beech (Fagus sylvatica) to oak forest (Quercus petraea, Q. frainetto, Q. cerris), we measured the aboveground biomass (AGC) and soil C pools (SOC). Methods AGC pools and SOC stocks to − 100 cm depth were calculated from forest inventory and volume-related SOC content data for beech, mixed beech-oak and oak forests in three transects in the natural beech-oak ecotone of western Romania, where beech occurs at its heat- and drought-induced distribution limit. Results From the cooler, more humid beech forests to the warmer, more xeric oak forests, which are 1–2 K warmer, AGC and SOC pools decreased by about 22% (40 Mg C ha−1) and 20% (17 Mg C ha−1), respectively. The likely main drivers are indirect temperature effects acting through tree species and management in the case of AGC, but direct temperature effects for SOC. Conclusion If drought- and heat-affected beech forests in Central Europe are replaced by thermophilic oak forests in future, this will lead to carbon losses of ~ 50–60 Mg ha−1, thus reducing ecosystem carbon storage substantially.

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Section: The Beech-oak Forest Ecotone Is Associated With a Shift From Mesic To Thermophilic Tree Speciesmentioning

confidence: 61%

Section: Climatic Conditions Across the Beech-oak Ecotonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Climate warming-induced replacement of mesic beech by thermophilic oak forests will reduce the carbon storage potential in aboveground biomass and soil

Kasper

Weigel

Walentowski

et al. 2021

Annals of Forest Science

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“…L. (Figure S1.1 in Appendix S1). They are accompanied by other broadleaf species with assumed higher drought tolerance such as Carpinus betulus L. and C. orientalis L., Tilia cordata L. and T. tomentosa Moench., and Acer tataricum L. At its south‐eastern and southern distribution limit, beech often only persists in small refugia as in deep valleys or on north‐exposed slopes with more humid local climate (Coldea et al, 2015; Hohnwald et al, 2020; Indreica et al, 2017). These rear‐edge populations are well suited for analysing the adaptive capacity and growth response to climatic changes of beech in comparison to other more drought‐tolerant species.…”

Section: Introductionmentioning

confidence: 99%

Higher growth synchrony and climate change‐sensitivity in European beech and silver linden than in temperate oaks

Kasper

Leuschner

Walentowski³

et al. 2022

Journal of Biogeography

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Aim Climatic changes affect the growth dynamics of temperate trees, but these effects might differ between co‐occurring ring‐ and diffuse‐porous species as well as between mesic and xeric rear‐edge populations. We explore whether recent climate warming has increased the climate sensitivity and within‐stand synchrony of growth in these groups differently. Location The natural beech–oak ecotone in Western Romania at the dry margin of beech occurrence. Taxa Three ring‐porous oak species (Quercus petraea, Q. frainetto and Q. cerris), and diffuse‐porous European beech (Fagus sylvatica) and silver linden (Tilia tomentosa). Methods We correlated tree‐ring records with monthly and seasonal climate data (period 1940–2017). Regional growth synchrony was assessed through the analysis of inter‐series correlation of growth within populations and among populations using mixed models. Results In all five species including two south‐east European oak taxa and silver linden, water availability in summer was the most important climatic determinant of radial growth. This factor has gained in importance since the onset of rapid warming after 1980, while the impact of other climate factors in spring and summer has decreased. Within‐population growth synchrony as a measure of overall climatic stress has increased, or remained stable, since 1980 in beech and silver linden, but has decreased in the oak species, matching declining growth trends in beech and linden and increasing (or stable) trends in the oaks. Main Conclusions The patterns of growth synchrony provide valuable information on tree species' drought susceptibility in efforts to select suitable tree species for climate change‐adapted forestry. The climate vulnerability of beech is higher than that of the more drought‐resistant oak species due to its marked summer‐drought sensitivity of growth.

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“…The size of the country is not necessarily relevant, as even smaller countries can exhibit a large number of ecoregions, with an impact in forest management. Romania, for example, is almost evenly distributed among the main geomorphological areas (i.e., plains, hills, and mountains), and its vegetation is particularly diverse [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Regional Variability of the Romanian Main Tree Species Growth Using National Forest Inventory Increment Cores

Marin

Strimbu

Abrudan

et al. 2020

Forests

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In many countries, National Forest Inventory (NFI) data is used to assess the variability of forest growth across the country. The identification of areas with similar growths provides the foundation for development of regional models. The objective of the present study is to identify areas with similar diameter and basal area growth using increment cores acquired by the NFI for the three main Romanian species: Norway spruce (Picea abies L. Karst), European beech (Fagus sylvatica L.), and Sessile oak (Quercus petraea (Matt.) Liebl.). We used 6536 increment cores with ages less than 100 years, a total of 427,635 rings. The country was divided in 21 non-overlapping ecoregions based on geomorphology, soil, geology and spatial contiguousness. Mixed models and multivariate analyses were used to assess the differences in annual dimeter at breast height and basal area growth among ecoregions. Irrespective of the species, the mixed models analysis revealed significant differences in growth between the ecoregions. However, some ecoregions were similar in terms of growth and could be aggregated. Multivariate analysis reinforced the difference between ecoregions and showed no temporal grouping for spruce and beech. Sessile oak growth was separated not only by ecoregions, but also by time, with some ecoregions being more prone to draught. Our study showed that countries of median size, such as Romania, could exhibit significant spatial differences in forest growth. Therefore, countrywide growth models incorporate too much variability to be considered operationally feasible. Furthermore, it is difficult to justify the current growth and yield models as a legal binding planning tool.

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Romanian Forest Database: a phytosociological archive of woody vegetation

Cited by 10 publications

References 0 publications

Climate warming-induced replacement of mesic beech by thermophilic oak forests will reduce the carbon storage potential in aboveground biomass and soil

Climate warming-induced replacement of mesic beech by thermophilic oak forests will reduce the carbon storage potential in aboveground biomass and soil

Higher growth synchrony and climate change‐sensitivity in European beech and silver linden than in temperate oaks

Regional Variability of the Romanian Main Tree Species Growth Using National Forest Inventory Increment Cores

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