1. The effect of forest gaps on the diversity and composition of bacterial communities in mixed-type forest soils across the Carpathian mountainsNejc Suban, Olivera Maksimović, Nataša Šibanc, Tijana Martinović, Eva Dařenová, Matjaž Čater, Tine Grebenc, 2024, izvirni znanstveni članek Povzetek: Mixed forests of European beech (Fagus sylvatica L.) and silver fir (Abies alba Mill.) play a vital ecological role in Central and South-Eastern Europe. This study investigates the diversity and composition of soil bacterial communities in these forests, focusing on rhizosphere and bulk soils under varying canopy structures. Soil samples were collected from eight sites along the Carpathian Mountains, including managed forests and the remnants of old growth. Metabarcoding of bacterial communities revealed that alpha diversity (species richness, Shannon index, and evenness) was significantly affected by sampling location but not by forest canopy structure or soil type (rhizosphere and bulk soil). The lowest bacterial diversity was found in the old-growth forest of the Beskidy region, while the highest was recorded in managed forest in Vrancea. Beta diversity analyses showed minimal variation between rhizosphere and bulk soil bacterial communities, with geographic distance being the strongest predictor of community composition. Actinobacteriota and Proteobacteria were the dominant phyla across all sites, with higher relative abundance of Actinobacteriota in all rhizosphere samples compared to bulk soil. Complex combinations of various environmental conditions at each sampling location, including soil parameters (mainly pH and C:N ratio), the age of forest gaps, the type and intensity of disturbances, and species composition of above-ground vegetation, can strongly affect soil bacterial communities. A closer examination of additional environmental variables would be necessary to better explain the observed differences in the diversity and composition of bacterial communities.
Ključne besede: forest gaps, forest management, soil microbiome, soil, rhizosphere, Carpathians, temperate forest
Objavljeno v DiRROS: 30.12.2024; Ogledov: 2029; Prenosov: 863
 Celotno besedilo (1,29 MB) |
2. Response of beech and fir in the Carpathians and DinaridesEva Dařenová, Pia Caroline Adamič, Matjaž Čater, 2024, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: silver fir, beech, light response, Carpathians, Dinarides, soil water content, forest
Objavljeno v DiRROS: 02.09.2024; Ogledov: 922; Prenosov: 479
Celotno besedilo (845,78 KB) |
3. Soil microbiome along the carpathian mountainsNejc Suban, Olivera Maksimović, Nataša Šibanc, Tijana Martinović, Eva Dařenová, Matjaž Čater, Tine Grebenc, 2024, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: soil microbiome, next-generation sequencing, climate change, forest soil, fungi, bacteria
Objavljeno v DiRROS: 02.09.2024; Ogledov: 1035; Prenosov: 330
Celotno besedilo (632,77 KB) |
4. Effect of temperature, water availability, and soil properties on soil CO2 efflux in beech-fir forests along the Carpathian Mts.Eva Dařenová, Pia Caroline Adamič, Matjaž Čater, 2024, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: canopy gap, carbon content, nitrogen content, soil respiration, soil water content, forest
Objavljeno v DiRROS: 02.09.2024; Ogledov: 1002; Prenosov: 432
Celotno besedilo (396,29 KB) |
5. |
6. Response of beech and fir to different light intensities along the Carpathian and Dinaric MountainsMatjaž Čater, Pia Caroline Adamič, Eva Dařenová, 2024, izvirni znanstveni članek Povzetek: Predicting global change mitigations based on environmental variables, like temperature and water availability, although yielding insightful hypothesis still lacks the integration of environmental responses. Physiological limits should be assessed to obtain a complete representation of a species’ fundamental niche. Detailed ecophysiological studies on the response of trees along the latitudinal gradient are rare. They could shed light on the behaviour under different light intensities and other studied traits. The forests of the Dinaric Mountains and the Carpathians represent the largest contiguous forest complexes in south-eastern Europe. In uneven-aged Carpathian (8 plots) and Dinaric Mountain (11 plots) forests, net assimilation (Amax) and maximum quantum yield (Φ) were measured for beech and fir in three predefined light intensity categories according to the indirect site factor (ISF%) obtained by the analysis of hemispherical photographs in managed and old growth forests, all located above 800 m a.s.l. The measurements were carried out under fixed environmental conditions in each light category per plot for three consecutive years. Data from the last 50-year average period from the CRU TS 4.01 dataset were used for the comparison between Amax, Φ, and climate. The highest Φ for beech were observed in the central part of the Dinaric Mountains and in the south westernmost and northwesternmost part of the Carpathians for both beech and fir, while they were highest for fir in the Dinaric Mountains in the northwesternmost part of the study area. The Φ-value of beech decreased in both complexes with increasing mean annual temperature and was highest in the open landscape. For fir in the Carpathians, Φ decreased with increasing mean annual temperature, while in the Dinaric Mountains it increased with higher temperature and showed a more scattered response compared to the Carpathians. Short-term ecophysiological responses of beech and fir were consistent to long-term radial growth observations observed on same locations. The results may provide a basis and an indication of the future response of two tree species in their biogeographical range to climate change in terms of competitiveness, existence and consequently forest management decisions.
Ključne besede: silver fir, beech, light response, Carpathian Mountains, Dinaric Mountains, temperature, precipitation
Objavljeno v DiRROS: 08.05.2024; Ogledov: 1219; Prenosov: 981
Celotno besedilo (1,56 MB)
Gradivo ima več datotek! Več... |
7. Harvesting intensity and tree species affect soil respiration in uneven-aged Dinaric forest standsMatjaž Čater, Eva Dařenová, Primož Simončič, 2021, izvirni znanstveni članek Povzetek: Forest management, especially thinning and harvesting measures, has a significant impact on the forest carbon balance especially in the forests with long-term continuous cover history. We measured soil CO2 efflux (Rs) in three forest complexes of mixed, uneven-aged Dinaric forests with predominating silver fir (Abies alba Mill.), beech (Fagus sylvatica L.), and Norway spruce (Picea abies Karst.). Rs was measured after removal of mature forest stands with 50% and 100% intensity of living stock and compared with Rs on the control plots without any applied silvicultural measures. Rs was measured monthly in three consecutive 2012, 2013 and 2014 growing periods. Soil CO2 efflux increased after harvest of both intensities in all studied forest stands. The biggest increase was measured in beech stands and amounted up to 47 and 69% for 50% and 100% harvest intensities, respectively. The effect of harvest on Rs in spruce and fir stands was similar - up to 26% for 50% harvest intensity and 48% for 100% harvest intensity. Despite the biggest increase after harvest, Rs in beech stands returned the fastest to the level of the uncut forest and this levelling period (LP) took 14-17 months with a little delay of the stands with 100% harvest intensity. The LP for all fir stands, for spruce stands with 50% harvest intensity and for one spruce stand with 100% harvest intensity, was 26-29 months. At two spruce stands with 100% harvest intensity we did not record Rs levelling during our three-year study. This study involved forest stands of three predominating tree species growing under the same conditions, which allowed us to determine the species-specific sensitivity of soil CO2 efflux to the different harvesting intensities.
Ključne besede: harvesting intensity, soil CO2 efflux, silviculture, carbon release, silver fir forests, Beech forestrs, Norway spruce forests
Objavljeno v DiRROS: 08.10.2020; Ogledov: 2253; Prenosov: 1176
Celotno besedilo (1,11 MB)
Gradivo ima več datotek! Več... |
8. Effect of spatial scale and harvest on heterogeneity of forest floor CO2 efflux in a sessile oak forestEva Dařenová, Matjaž Čater, 2020, izvirni znanstveni članek Povzetek: Soil respiration is the second largest flux of carbon between terrestrial ecosystems and the atmosphere and it is substantially sensitive to climate change. Monitoring CO2 efflux and its upscaling from field measurements to the ecosystem level is a complex task, due to the high spatial and temporal variability of the fluxes. Human intervention, e.g. through forest harvest, may change both CO2 efflux and its spatial heterogeneity. The objective of our study was to quantify spatial heterogeneity of soil CO2 efflux within and among plots distributed within a topographically variable sessile oak forest stand before and after harvesting. Forest floor CO2 efflux, soil temperature and soil water content were measured monthly in a sessile oak forest during two growing seasons: one before and one after harvesting. Stand structure characteristics (gap fraction, leaf area index, tree number and size) and the amount of understory also were determined. Relationships between individual variables and spatial heterogeneity were analyzed. The small-scale spatial heterogeneity (expresses as the coefficient of variation) of forest floor CO2 efflux and soil water content (SWC) in the undisturbed forest was low, at maximum 0.22 and 0.13, respectively. Studied variables had no effect on spatial heterogeneity of forest floor CO2 efflux except for the amount of understorey vegetation which positively correlated with forest floor CO2 efflux. Although the studied forest was situated in topographically variable terrain, we observed that inter-plot heterogeneity of forest floor CO2 efflux was lower than that within plots. Stand harvest increased the intra-plot heterogeneity of forest floor CO2 efflux but did not affect the inter-plot heterogeneity. This leads to the conclusion that the number of positions within an individual plot should increase after harvest but the number of plots may remain unchanged to determine adequately ecosystem forest floor CO2 efflux.
Ključne besede: gap fraction, LAI, Quercus petraea, soil respiration, soil water content
Objavljeno v DiRROS: 20.02.2020; Ogledov: 2862; Prenosov: 207 |
