A5050739109- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Plant responses to elevated CO2
- Remote Sensing in Agriculture
- Tree-ring climate responses
- Botany and Plant Ecology Studies
- Remote Sensing and LiDAR Applications
- Leaf Properties and Growth Measurement
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Forest Management and Policy
- Forest Ecology and Biodiversity Studies
- Seedling growth and survival studies
- Tree Root and Stability Studies
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Conservation, Biodiversity, and Resource Management
- Flowering Plant Growth and Cultivation
- Plant Pathogens and Fungal Diseases
- Crop Yield and Soil Fertility
- Vehicle emissions and performance
- Reproductive Physiology in Livestock
- African Botany and Ecology Studies
- Forest Biomass Utilization and Management
- Bioenergy crop production and management
Mendel University in Brno
2014-2024
Czech Academy of Sciences, Global Change Research Institute
2010-2018
University of South Bohemia in České Budějovice
2018
Universidad de Granada
2018
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2018
University of Gothenburg
2018
Gembloux Agro-Bio Tech
2018
National Research Council
2018
Centre for Research on Ecology and Forestry Applications
2018
Lund University
2018
Abstract Cloud cover increases the proportion of diffuse radiation reaching Earth's surface and affects many microclimatic factors such as temperature, vapour pressure deficit precipitation. We compared relative efficiencies canopy photosynthesis to direct photosynthetic photon flux density (PPFD) for a Norway spruce forest (25‐year‐old, leaf area index 11 m 2 −2 ) during two successive 7‐day periods in August. The comparison was based on response net ecosystem exchange (NEE) CO PPFD. NEE...
Summary 1. Cloud cover affects carbon exchange between biota and the atmosphere. Recent studies have demonstrated that an increase in diffuse radiation fraction enhances photosynthetic efficiency of canopies. Although exact mechanism behind this effect is not clear, a more even distribution light among leaves across vertical profile canopy considered to be most important cause difference. 2. To test hypothesis, net ecosystem production (NEP) Norway spruce forest (30‐year‐old) was measured...
Under ongoing climate change, more frequent and severe drought periods accompanied by heat waves are expected in the future. these conditions, tree's survival is conditioned fast recovery of functions after release. Therefore, presented study, we evaluated effect long-term water reduction soil on tree use growth dynamics Norway spruce.The experiment was conducted two young spruce plots located suboptimal sites at a low altitude 440 m a.s.l. In first plot (PE), 25% precipitation throughfall...
Abstract The Integrated Carbon Observation System is a Pan-European distributed research infrastructure that has as its main goal to monitor the greenhouse gas balance of Europe. ecosystem component consists multitude stations where net exchange monitored continuously by eddy covariance measurements while, in addition many other are carried out key an understanding balance. Amongst them continuous meteorological and set non-continuous related vegetation. latter include Green Area Index,...
Abstract The positive ecological interaction between gap formation and natural regeneration has been examined but little research carried out on the effects of gaps in forests under different intensities disturbance. This study evaluates composition, diversity, density abundance tree species undisturbed, intermittently disturbed, disturbed forest sites. Bia Tano Forest Reserve Ghana was area three each were selected site categories. Ten circular subsampling areas 1 m 2 delineated at spacing...
Background and AimsStem branch respiration, important components of total forest ecosystem were measured on Norway spruce (Picea abies) trees from May to October in four consecutive years order (1) evaluate the influence temperature woody tissue CO2 efflux with special focus variation Q10 (change respiration rate resulting a 10 °C increase temperature) within between seasons, (2) quantify contribution above-ground (stem branch) carbon balance ecosystem.
This study focused on the comparison of two contrasting forest regeneration types and their susceptibility to drought stress. Transpiration biomass production were studied young sessile oak trees Quercus petraea (Matt.) Liebl. regenerated as sprouts seedlings, grown in a coppice experimental site Czech Republic. Biomass was estimated using destructive methods, while transpiration derived from sap flow measurements assessed according plant biometry microclimatic conditions. Sprouts...
In a quest to improve the diversity and conservation of native tree species in tropical African forests, gap regeneration remains all-important nature-promoting silviculture practice ecosystem-based strategy for attaining these ecological goals. Nine gaps varying sizes (286–2005 m2) were randomly selected: three each from undisturbed, slightly disturbed areas within Bia Tano Forest Reserve Ghana. Within individual gaps, four transects (North–South–East–West directions) followed by 10...
We present a new technological approach for in situ investigation of long-term impacts elevated CO2 concentration (EC) on juvenile forests characterised by an intensive community level and canopy closure phase. Construction the glass domes is based properties earlier tested open-top chambers (OTCs). An air climatisation device together with adjustable window system, that forms shell cover domes, able to keep required [CO2] both time spatial scales relatively small consumption supplied CO2....
This contribution presents LAI data of 17 Norway spruce stands different age (from 15 to 102 years) and health status (defoliation ranging from 0 40 %) located in the Těšínské Beskydy Mts. (NE Czech Republic). Defoliation degree was estimated by ocular observation indirectly on base gap fraction method using LAI-2000 PCA (Li-Cor, USA). It found that decreased with stand (approximately 12.6 8.5) whereas defoliation increased. Therefore, strong relationship between as well fractions found....
Increased frequency and intensity of drought events consequently affect oak high forests with the process further decline, compromised growth questionable natural regeneration. To overcome such difficulties, new adaptive strategies are required. Coppicing, as oldest way forest management, might provide some solutions. In our study two contrasting management systems, sessile coppice forest, were compared at initial stages regeneration development. The transpiration young sprouts seedlings was...
The accuracy of LAI-2000 Plant Canopy Analyzer for leaf (LAI) and plant (PAI) area indexes measurements was tested in 20-year-old Norway spruce stand using the reduction canopy biomass. Needle branch areas were reduced progressively upward every one meter. Values effective index (LAIe), as an uncorrected product LAI-2000, compared with directly estimated LAI PAI values after each step. underestimates according to rings readings, varied proportions between wood areas. LAIc have been increased...
Assimilation and photosynthetic efficiency (maximal quantum yield) of young oaks were compared in coppice standard sessile oak stands comparable age (100 years) under different light intensity categories: minimum -ISF < 20%, low -20%<ISF<25%, medium -25%<ISF<30% the open, without mature canopy cover >30% during favourable drought conditions.Measurements maximal assimilation rates performed at a constant temperature measurement block (20°C), CO 2 concentration 400 µmol/l, flow 500 µmol/s...
Tree-level allometric functions for a precise predicting of stem, branch and leaf mass surface area three needle-shoot age classes were estimated from measurements crown stem dimensions in 34 harvested Norway spruce (Picea abies [L.] Karst.) trees. Trees grown within 16-years-old stand the Beskids Mountains. The results showed parameters (stem diameter at breast height - dbh, volume Vs sapwood SA) to be highly correlated (r > 0.98) with mass/area total aboveground tree. Crown (Cv) (Ca) best...
We focused on the ability of one-year-old and two-year-old plants Paulownia Clon in vitro 112® to sprout grow branches, their pruning for best possible growth a plantation Střelice u Brna. Furthermore, we carried out selected parts that comprised: spring pruning; reduction angle between stem axis one new growing sprout; year-long pruning. The sprouting capacity was high—up 56% (one-year-old plants) 50% (two-year-old plants). Branches grew 34% all 57% plants. method seems be keeping or stump...
Forest fires are becoming a serious concern in Central European countries such as Austria (AT) and the Czech Republic (CZ). Mapping fire ignition probabilities across can be useful tool for risk mitigation. This study was conducted to: (i) evaluate contribution of variables obtained from open-source datasets (i.e., MODIS, OpenStreetMap, WorldClim) modeling probability at country level; (ii) investigate how well Random (RF) method performs one to another. The importance predictors evaluated...
The leaf area index (LAI) of three monocultures Norway spruce (Picea abies (L.) Karst), different in age and structure, was measured by means two indirect optical techniques LAI field mapping: 1/ plant canopy analyser LAI-2000, 2/ digital hemispherical photographs (DHP). supportive measurements with the TRAC instrument were conducted to produce mainly element clumping index. aim study compare performances LAI-2000 DHP evaluate effect sampling strategies on estimation One suggested designs...