A5055763593- Forest ecology and management
- Forest Management and Policy
- Remote Sensing and LiDAR Applications
- Fire effects on ecosystems
- Forest Ecology and Biodiversity Studies
- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Remote Sensing in Agriculture
- Forest Biomass Utilization and Management
- Botany and Plant Ecology Studies
- Fluid Dynamics and Turbulent Flows
- Tree Root and Stability Studies
- Ecology and Vegetation Dynamics Studies
- Land Use and Ecosystem Services
- Forest Insect Ecology and Management
- Plasma and Flow Control in Aerodynamics
- Peatlands and Wetlands Ecology
- Soil erosion and sediment transport
- Species Distribution and Climate Change
- Particle Dynamics in Fluid Flows
- Metallurgical Processes and Thermodynamics
- Landslides and related hazards
- Combustion and flame dynamics
- Flow Measurement and Analysis
- Cancer Risks and Factors
BOKU University
2016-2025
Swinburne University of Technology
2020-2024
Bundesamt für Wasserwirtschaft
2023
Dutch Centre for Field Ornithology
2022
University of Twente
2022
Sapienza University of Rome
2022
Austrian Research Centre for Forests
2018
Technische Universität Dresden
2009-2015
University of Bern
2011-2012
Mortality is a key indicator of forest health, and increasing mortality can serve as bellwether for the impacts global change on ecosystems. Here we analyze trends in canopy between 1984 2016 over more than 30 Mill. ha temperate forests Europe, based unique dataset 24,000 visually interpreted spectral trajectories from Landsat archive. On average, 0.79% area was affected by natural or human-induced annually. Canopy increased +2.40% year-1, doubling since 1984. Areas experiencing low-severity...
Abstract Tree mortality is an important process in forest ecosystems, frequently hypothesized to be highly climate sensitive. Yet, tree death remains one of the least understood processes dynamics. Recently, changes have been observed forests around globe, which could profoundly affect ecosystem functioning and services provisioning society. We describe continental‐scale patterns recent from only consistent pan‐European monitoring network, identifying hotspots southern northern Europe....
Forests mitigate climate change by sequestering large amounts of carbon (C). However, forest C storage is not permanent, and pulses tree mortality can thwart mitigation efforts. Forest pests are increasingly redistributed around the globe. Yet, potential future impact invasive alien on cycle remains uncertain. Here we show that parts Europe could be invaded five detrimental already under current climate. Climate increases range particularly in Northern Eastern Europe. We estimate live at...
The severe consequences of human disruptions to the global carbon cycle have prompted intense interest in strategies reduce atmospheric CO2 concentrations. Because growing forests capture their biomass and soils, large-scale tree planting efforts been advertised as a viable way counteract anthropogenic emissions part net-zero emission strategies. Here, we assess potential impact reforestation afforestation on climate system, identify ecological, economic, societal implications such efforts.
Abstract Litterfall is a major, yet poorly studied, process within forest ecosystems globally. It important for carbon dynamics, edaphic communities, and maintaining site fertility. Reliable information on the nutrient input from litterfall, provided by litter traps, relevant to wide audience including policy makers soil scientists. We used litterfall observations of 320 plots pan‐European monitoring network “International Co‐operative Programme Assessment Monitoring Air Pollution Effects...
Abstract European forests are an important source for timber production, human welfare, income, protection and biodiversity. During the last two decades, Europe has experienced a number of droughts which have been exceptional within 500 years, both in terms duration intensity. These seem to leave remarkable imprints on mortality dynamics forests. However, systematic observations tree decline, with emphasis single species, scarce so far that our understanding drought occurrence is still...
Reduced stomatal conductance is a common plant response to rising atmospheric CO2 and increases water use efficiency (W). At the leaf-scale, W depends on nitrogen availability in addition CO2. In hydroclimate models key driver of rainfall, droughts, streamflow extremes. We used global climate data derive Aridity Indices (AI) for forests over period 1965-2015 synthesised those with deposition derived from stable isotopes tree rings. AI account most variance trees across globe, while...
FORMIT-M is a widely applicable, open-access, simple and flexible, climate-sensitive forest management simulator requiring only standard inventory data as input. It combines process-based carbon balance approach with strong inventory-based empirical component. The model has been linked to the global sector EFI-GTM secure consistency between timber cutting demand, although prescribed harvest scenarios can also be used. Here we introduce structure of demonstrate its use example simulations...
Net primary production (NPP) is an important ecological metric for studying forest ecosystems and their carbon sequestration, assessing the potential supply of food or timber quantifying impacts climate change on ecosystems. The global MODIS NPP dataset using MOD17 algorithm provides valuable information monitoring at 1-km resolution. Since coarse-resolution data are used, may contain uncertainties Europe. We used a daily gridded European set with to create regional EURO. For evaluation this...
Dielectric barrier discharge (DBD) plasma actuators are a promissing tool for active flow control applications. In order to determine the time-resolved body force induced by DBD actuator, which was driven 9.5 kHz sinusoidal signal, has be captured with high spatial and temporal resolution. For this purpose we applied laser Doppler velocity profile sensor measurements of two-component field Lagrangian acceleration. A resolution 7.3 µs 40 µm achieved. We present local behaviours actuator....
Abstract Fine roots and above‐ground litterfall play a pivotal role in carbon dynamics forests. Nonetheless, direct estimation of stocks fine remains methodologically challenging. Models are thus widely used to estimate these help elucidate drivers root growth turnover, at range scales. We updated database biomass, necromass production derived from 454 plots across European then compared biomass estimates obtained 19 different models. Typical input variables for the models included climate,...
Assumptions first made in the 1960's that litter (1) decomposes to completion, (2) accumulates following a negative exponential pattern, (3) reaches steady state limit and (4) is constant thereafter, remain overwhelmingly used parameterize models predict mass fire risk south-eastern Australian forest woodlands. None of these assumptions hold. There no evidence any has attained at time last 60 years, nor litterfall or are ever on annual scales. Attainment improbable given changing climates...
The mission of this study is to compare Net Primary Productivity (NPP) estimates using (i) forest inventory data and (ii) spatio-temporally continuous MODIS (MODerate resolution Imaging Spectroradiometer) remote sensing for Austria. While inventories assess the change in growth based on repeated individual tree measurements (DBH, height etc.), NPP are ecophysiological processes such as photosynthesis, respiration carbon allocation. We obtained national from Austria, calculated a...
ABSTRACT The evolution of a debris‐flow cone depends on multitude factors in the hydrogeomorphic system. Investigations history and dynamics highly active catchments therefore require an integrative approach with temporal spatial resolution appropriate for goals study. We present use orthophoto time series to augment standard dendrogeomorphic techniques describe spatio‐temporal debris flows western Austrian Alps. Analysis seven orthophotos since 1951 revealed migration deposition areas...
Life cycle assessment (LCA) has become a common methodology to analyze environmental impacts of forestry systems. Although LCA been widely applied since the 90s, LCAs are still often based on generic Cycle Inventory (LCI). With purpose improving practices in sector, we developed European Forestry Operations (EFO-LCI) and analyzed available information check if within sector national differences really exist. We classified forests basis "Forest Units" (combinations tree species silvicultural...
Bark contributes approximately 20% to the total above-ground biomass of trees, yet bark is not properly accounted for when estimating carbon sequestered by trees. Current allometric functions estimate tree volume from diameter measured over bark, and derive density content estimates wood. As hardwood species 40%-50% lower than wood density, but nearly equivalent in conifers, overestimated most species. The latter further exacerbated variation with surface morphology.Fissured measurements up...
Litter decomposition / accumulation are rate limiting steps in soil formation, carbon sequestration, nutrient cycling and fire risk temperate forests, highlighting the importance of robust predictive models at all geographic scales. Using a data set for Australian continent, we show that among range models, >60% variance litter mass over 40-year time span can be accounted by parsimonious model with elapsed time, indices aridity quality, as independent drivers. Aridity is an important driver...
Deadwood is an important and large carbon pool in unmanaged forests will become more managed forests, as changes forest management and/or frequent disturbances likely lead to higher deadwood amount Central European forests. Future dynamics can be currently not accurately assessed due lack of a conceptual understanding data on stocks, fluxes, importance fungi for decay the habitat value deadwood. In upcoming 3-year project funded by Austrian Science Fund, abbreviated with DD FOR, team...