Climate change is projected to lead to more frequent and intense climate extremes such as heat wa... more Climate change is projected to lead to more frequent and intense climate extremes such as heat waves and severe droughts. Boreal tree species are not an exception, and extreme drought events have already been evidenced as one of the main causes of dieback for Norway spruce and Scots pine along Europe. Consequently, the increment of tree species diversity by mixed stands has been widely proposed as an effective measure to counteract the adverse impacts of droughts on tree growth. Here, we aim to identify generalizable growth response patterns from drought events for former species in mixed versus monospecific stands. We used tree ring data from triplets (mixed and monospecific stands) included into REFORM project to show differences in drought resilience indices (resistance, recovery and resilience) involving drought events between 1985 and 2015. Significant differences were found between the species and between stand composition, i.e., mixed compared with monospecific stands. Common...
Lake Nemi lies in Alban Hills a quiescent volcanic complex, on which northwestern slope the city ... more Lake Nemi lies in Alban Hills a quiescent volcanic complex, on which northwestern slope the city of Rome is located. The town Nemi itself raises on a volcanic hill in the vicinity of the lake, seated in landscape surrounded by forests and fields. This area was selected as the location for the project of the H2020-MSCA-RISE-2016: CHARMED, No. 734684, titled " Characterisation of a green microenvironment and to study its impact upon health and well-being in the elderly as a way forward for health tourism ". Technical University in Zvolen is member of the consortium responsible for the characterization of Nemi´s ecosystem, and in particular its infrastructure with special regards to community health issues, air and water quality and land-use, with applications for health tourist attraction context. Poster presents partial results and activities of the TUZVO CHARMED team carried out so far.
The research presented herein explores soil organic carbon concentration (SOCC) under monodominan... more The research presented herein explores soil organic carbon concentration (SOCC) under monodominant primeval forests of European beech trees and their association with parent material on a regional scale. Soil sampling to a maximum depth of 0.8 m was conducted in six localities in the West, East, and South Carpathians, Eastern Albanides, and Central Apennines, situated on different parent materials. Samples were analysed for SOCC by the dry combustion method. The average SOCC values representing individual localities ranged from 12.5 g kg−1 to 154.8 g kg−1 with a 99.7% coefficient of variation. SOCC association with climatic variables and forest stand volume data available from the literature were assessed by a Pearson correlation coefficient. Differences in SOCC among localities caused by site conditions were treated as a fixed factor in Welch’s ANOVA and found to be significant (p < 0.05) in the majority of cases. The associations between SOCC and climatic variables or stand vol...
The paper deals with the comparison of the time series drawn from different climate databases. We... more The paper deals with the comparison of the time series drawn from different climate databases. We compared the observed data with the modeled data of monthly and seasonal temperature means and precipitation totals. Reliable and longest available time series of such data represent the basic starting point of dendroclimatic analyses. We evaluated the differences in the growth response of spruce derived using different databases of the considered climatic variables. The stem cores used to derive the cross-correlation function were taken from Hårås locality situated in the boreal zone of the Swedish part of Lapland. We compared the observed records from the nearest weather stations situated 18, 40, 70 and 110 km away from the locality with the interpolated data from four modeled temperature databases and four modeled precipitation databases generated by KNMI Climate Explorer. The spatial resolution of the modeled databases was 0.5° × 0.5° of latitude and longitude or 1° × 1° respect...
Past failures of monocultures, caused by wind-throw or insect damages, and ongoing climate change... more Past failures of monocultures, caused by wind-throw or insect damages, and ongoing climate change currently strongly stimulate research into mixed-species stands. So far, the focus has mainly been on combinations of species with obvious complementary functional traits. However, for any generalization, a broad overview of the mixing reactions of functionally different tree species in different mixing proportions, patterns and under different site conditions is needed, including assemblages of species with rather similar demands on resources such as light. Here, we studied the growth of Scots pine and oak in mixed versus monospecific stands on 36 triplets located along a productivity gradient across Europe, reaching from Sweden to Spain and from France to Georgia. The set-up represents a wide variation in precipitation (456–1250 mm year−1), mean annual temperature (6.7–11.5 °C) and drought index by de Martonne (21–63 mm °C−1). Stand inventories and increment cores of trees stemming fr...
We examined the effect of weather variables on radial growth of Norway spruce and European beech ... more We examined the effect of weather variables on radial growth of Norway spruce and European beech at the intra- and interannual level. We used database of regular growth measurements at 9 forest sites distributed along an altitudinal and spatial gradient within the Slovakia and Czech Republic. In the period of 2010–2017, we analysed data from 213 dendrometers with manual reading in monthly or biweekly interval. The mean daily and annual diameter increments were analysed in relation to air temperatures and precipitation observed during the respective growing seasons. The general intra-annual diameter increment was modelled using a log-normal function. Results of modelling suggest that precipitation was a better predicting factor of the increment in spruce, while air temperature enhanced predictions of increments in beech. The highest, eight-year-cumulative increment of spruce (31.1 mm) and beech (22.8 mm) was found in the mixed mountainous forest at Poľana site, where both species occ...
The paper deals with the comparison of the time series from different climate databases. We compa... more The paper deals with the comparison of the time series from different climate databases. We compared the measured data with the modelled data of monthly and seasonal temperature means and precipitation totals. Reliable and as long as possible time series of such data represent the basic starting point of dendroclimatic analyses. We evaluated the differences in the growth response of spruce derived using different databases of the stated climatic characteristics. The stem cores used to derive the cross-correlation function were taken from Haras locality situated in the boreal zone of the Swedish part of Lapland. We compared the measured records from the nearest meteorological stations situated 18 km and 40 km away from the locality with the interpolated values from CRU TS 3.21 climate database and with the reconstructed 502year-long database. The spatial resolution of the modelled databases was 0.5° x 0.5° of latitude and longitude. We found a systematic error of different magnitudes...
Climate change is projected to lead to more frequent and intense climate extremes such as heat wa... more Climate change is projected to lead to more frequent and intense climate extremes such as heat waves and severe droughts. Boreal tree species are not an exception, and extreme drought events have already been evidenced as one of the main causes of dieback for Norway spruce and Scots pine along Europe. Consequently, the increment of tree species diversity by mixed stands has been widely proposed as an effective measure to counteract the adverse impacts of droughts on tree growth. Here, we aim to identify generalizable growth response patterns from drought events for former species in mixed versus monospecific stands. We used tree ring data from triplets (mixed and monospecific stands) included into REFORM project to show differences in drought resilience indices (resistance, recovery and resilience) involving drought events between 1985 and 2015. Significant differences were found between the species and between stand composition, i.e., mixed compared with monospecific stands. Common...
Lake Nemi lies in Alban Hills a quiescent volcanic complex, on which northwestern slope the city ... more Lake Nemi lies in Alban Hills a quiescent volcanic complex, on which northwestern slope the city of Rome is located. The town Nemi itself raises on a volcanic hill in the vicinity of the lake, seated in landscape surrounded by forests and fields. This area was selected as the location for the project of the H2020-MSCA-RISE-2016: CHARMED, No. 734684, titled &quot; Characterisation of a green microenvironment and to study its impact upon health and well-being in the elderly as a way forward for health tourism &quot;. Technical University in Zvolen is member of the consortium responsible for the characterization of Nemi´s ecosystem, and in particular its infrastructure with special regards to community health issues, air and water quality and land-use, with applications for health tourist attraction context. Poster presents partial results and activities of the TUZVO CHARMED team carried out so far.
The research presented herein explores soil organic carbon concentration (SOCC) under monodominan... more The research presented herein explores soil organic carbon concentration (SOCC) under monodominant primeval forests of European beech trees and their association with parent material on a regional scale. Soil sampling to a maximum depth of 0.8 m was conducted in six localities in the West, East, and South Carpathians, Eastern Albanides, and Central Apennines, situated on different parent materials. Samples were analysed for SOCC by the dry combustion method. The average SOCC values representing individual localities ranged from 12.5 g kg−1 to 154.8 g kg−1 with a 99.7% coefficient of variation. SOCC association with climatic variables and forest stand volume data available from the literature were assessed by a Pearson correlation coefficient. Differences in SOCC among localities caused by site conditions were treated as a fixed factor in Welch’s ANOVA and found to be significant (p < 0.05) in the majority of cases. The associations between SOCC and climatic variables or stand vol...
The paper deals with the comparison of the time series drawn from different climate databases. We... more The paper deals with the comparison of the time series drawn from different climate databases. We compared the observed data with the modeled data of monthly and seasonal temperature means and precipitation totals. Reliable and longest available time series of such data represent the basic starting point of dendroclimatic analyses. We evaluated the differences in the growth response of spruce derived using different databases of the considered climatic variables. The stem cores used to derive the cross-correlation function were taken from Hårås locality situated in the boreal zone of the Swedish part of Lapland. We compared the observed records from the nearest weather stations situated 18, 40, 70 and 110 km away from the locality with the interpolated data from four modeled temperature databases and four modeled precipitation databases generated by KNMI Climate Explorer. The spatial resolution of the modeled databases was 0.5° × 0.5° of latitude and longitude or 1° × 1° respect...
Past failures of monocultures, caused by wind-throw or insect damages, and ongoing climate change... more Past failures of monocultures, caused by wind-throw or insect damages, and ongoing climate change currently strongly stimulate research into mixed-species stands. So far, the focus has mainly been on combinations of species with obvious complementary functional traits. However, for any generalization, a broad overview of the mixing reactions of functionally different tree species in different mixing proportions, patterns and under different site conditions is needed, including assemblages of species with rather similar demands on resources such as light. Here, we studied the growth of Scots pine and oak in mixed versus monospecific stands on 36 triplets located along a productivity gradient across Europe, reaching from Sweden to Spain and from France to Georgia. The set-up represents a wide variation in precipitation (456–1250 mm year−1), mean annual temperature (6.7–11.5 °C) and drought index by de Martonne (21–63 mm °C−1). Stand inventories and increment cores of trees stemming fr...
We examined the effect of weather variables on radial growth of Norway spruce and European beech ... more We examined the effect of weather variables on radial growth of Norway spruce and European beech at the intra- and interannual level. We used database of regular growth measurements at 9 forest sites distributed along an altitudinal and spatial gradient within the Slovakia and Czech Republic. In the period of 2010–2017, we analysed data from 213 dendrometers with manual reading in monthly or biweekly interval. The mean daily and annual diameter increments were analysed in relation to air temperatures and precipitation observed during the respective growing seasons. The general intra-annual diameter increment was modelled using a log-normal function. Results of modelling suggest that precipitation was a better predicting factor of the increment in spruce, while air temperature enhanced predictions of increments in beech. The highest, eight-year-cumulative increment of spruce (31.1 mm) and beech (22.8 mm) was found in the mixed mountainous forest at Poľana site, where both species occ...
The paper deals with the comparison of the time series from different climate databases. We compa... more The paper deals with the comparison of the time series from different climate databases. We compared the measured data with the modelled data of monthly and seasonal temperature means and precipitation totals. Reliable and as long as possible time series of such data represent the basic starting point of dendroclimatic analyses. We evaluated the differences in the growth response of spruce derived using different databases of the stated climatic characteristics. The stem cores used to derive the cross-correlation function were taken from Haras locality situated in the boreal zone of the Swedish part of Lapland. We compared the measured records from the nearest meteorological stations situated 18 km and 40 km away from the locality with the interpolated values from CRU TS 3.21 climate database and with the reconstructed 502year-long database. The spatial resolution of the modelled databases was 0.5° x 0.5° of latitude and longitude. We found a systematic error of different magnitudes...
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