A5061736954- Ecology and Vegetation Dynamics Studies
- Forest ecology and management
- Forest Ecology and Biodiversity Studies
- Species Distribution and Climate Change
- Plant Water Relations and Carbon Dynamics
- Forest Management and Policy
- Tree-ring climate responses
- Botany and Plant Ecology Studies
- Remote Sensing and LiDAR Applications
- Wildlife Ecology and Conservation
- Remote Sensing in Agriculture
- Geotourism and Geoheritage Conservation
- Lichen and fungal ecology
- Land Use and Ecosystem Services
- Landslides and related hazards
- Ecology, Conservation, and Geographical Studies
- Satellite Image Processing and Photogrammetry
- Rangeland Management and Livestock Ecology
- Fire effects on ecosystems
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Forest Insect Ecology and Management
- Cryospheric studies and observations
- Environmental Science and Technology
- Bioenergy crop production and management
Swiss Federal Institute for Forest, Snow and Landscape Research
2012-2024
University of Wisconsin–Madison
2017-2023
ETH Zurich
2011-2012
Surface models provide key knowledge of the 3-d structure forests. Aerial stereo imagery acquired during routine mapping campaigns covering whole Switzerland (41,285 km2), offers a potential data source to calculate digital surface (DSMs). We present an automated workflow generate nationwide DSM with resolution 1 × m based on photogrammetric image matching. A canopy height model (CHM) is derived in combination existing terrain (DTM). ADS40/ADS80 summer images from 2007 2012 were used for...
Digital surface models (DSMs) are widely used in forest science to model the canopy. Stereo pairs of very high resolution satellite and digital aerial images relatively new their absolute accuracy for DSM generation is largely unknown. For an assessment these input data two DSMs based on a WorldView-2 stereo pair ADS80 were generated with photogrammetric instruments. Rational polynomial coefficients (RPCs) defining orientation images, which can be enhanced ground control points (GCPs). Thus...
Geodiversity (i.e., the variation in Earth's abiotic processes and features) has strong effects on biodiversity patterns. However, major gaps remain our understanding of how relationships between geodiversity vary over space time. Biodiversity data are globally sparse concentrated particular regions. In contrast, many forms can be measured continuously across globe with satellite remote sensing. Satellite sensing directly measures environmental variables grain sizes as small tens metres...
Abstract Questions Are the structural characteristics of natural beech forests predominant on small monitoring plots representative large‐scale features these forests? Do findings our investigation support hypothesis that this primeval forest is shaped by fine‐scale processes, or there evidence high‐severity disturbance events have affected its structure? Location Ukrainian C arpathians, U holka‐ S hyrokyi L uh, largest in Europe, covering 102.8 km 2. Methods On 314 (500 m 2 ) circular...
Abstract Mixed mountain forests of European beech (Fagus sylvatica L.), Norway spruce (Picea abies (L.) Karst), and silver fir (Abies alba Mill.) cover a total area more than 10 million hectares in Europe. Due to altitudinal zoning, these are particularly vulnerable climate change. However, as little is known about the long-term development productivity adaptation mitigation potential forest systems Europe, reliable information on required for sustainable management. Using generalized...
Little is known about the gap pattern of primeval beech forests, since large‐scale studies with continuous coverage are lacking. Analyses forest structural patterns have benefitted from advances in remote sensing, especially launch satellites providing data submetric ground resolution. These developments can strongly advance our knowledge natural dynamics and disturbance regimes. The Uholka‐Shyrokyi Luh Ukrainian Carpathians, largest remnant European ( Fagus sylvatica L.) covering 102.8 km 2...
Abstract Historical and future trends in net primary productivity (NPP) its sensitivity to global change are largely unknown because of the lack long-term, high-resolution data. Here we test whether annually resolved tree-ring stable carbon (δ 13 C) oxygen 18 O) isotopes can be used as proxies for reconstructing past NPP. Stable isotope chronologies from four sites within three distinct hydroclimatic environments eastern United States (US) were compared time space against satellite-derived...
Abstract Aim We may be able to buffer biodiversity against the effects of ongoing climate change by prioritizing protection habitat with diverse physical features (high geodiversity) associated ecological and evolutionary mechanisms that maintain high biodiversity. Nonetheless, relationships between vary spatial biological context. In this study, we compare how well geodiversity (spatial variation in abiotic processes features) explain patterns birds trees. also evaluate consistency...
Abstract Process-based forest models are important tools for predicting growth and their vulnerability to factors such as climate change or responses management. One of the most widely used stand-level process-based is 3-PG model (Physiological Processes Predicting Growth), which applications including estimating wood production, carbon budgets, water balance susceptibility change. Few parameter sets available central European species even fewer appropriate mixed-species forests. Here we...
Forests can contribute to climate change mitigation by sequestering carbon when management intensity is reduced. However, there high uncertainty regarding biomass dynamics in temperate forests after the cessation of management. We used forest inventory data from an extensive network 224 plots 37 natural reserves (NFR) covering a wide environmental gradient with mean annual temperatures ranging 1 10.4 °C and precipitation 901 2317 mm. Inventories had been conducted approximately every 10...
ABSTRACT With ongoing global warming, increasing water deficits promote physiological stress on forest ecosystems with negative impacts tree growth, vitality, and survival. How individual species will react to increased drought is therefore a key research question address for carbon accounting the development of climate change mitigation strategies. Recent tree‐ring studies have shown that trees at higher latitudes benefit from warmer temperatures, yet this likely highly species‐dependent...
Self-thinning dynamics are often considered when managing stand density in forests and used to constrain forest growth models. However, self-thinning relationships quantified using only data at a conceptualised line, even though can begin before the actually reaches line. Also, few account for effects of species composition mixed-species forests, structure such as relative height (in mixtures), and/or size or age cohorts uneven-aged forests. Such considerations may be important given global...
Abstract Tree regeneration is a key demographic process influencing long‐term forest dynamics. It driven by climate, disturbances, biotic factors and their interactions. Thus, predictions of tree are challenging due to complex feedbacks along the wide climatic gradients covered most species. The stress gradient hypothesis (SGH) provides framework for assessing such across species ranges, suggesting that competition between trees more frequent under favourable conditions, whereas reduced...
Abstract Aim Predicting biodiversity responses to global changes requires good models of species' distributions. Both environmental conditions and human activities determine population density patterns. However, quantifying the relationship between wildlife densities their underlying across large geographical scales has remained challenging. Our goal was explain abundances mammal species based on response several remotely sensed indices including Dynamic Habitat Indices (DHIs) novel Winter...
Die prognostizierte Zunahme von extremen Störungsereignissen wie Borkenkäferbefall und Windwurf im Kontext des Klimawandels stellt die Schweizer Waldbewirtschaftung vor grosse Herausforderungen. Besonders betroffen sind fichtendominierte Gebirgswälder, grossflächig verbreitet häufig eine zentrale Schutzfunktion gegenüber Naturgefahren erfüllen. WSL erarbeitet zusammen mit der Praxis Grundlagen für Priorisierung Bewirtschaftung dieser Wälder unter dem Einfluss Störungen. Dazu werden räumliche...
Abstract Aims Evaluation and modification of a classification protocol for delineating development phases the beech forest life cycle (Tabaku, Struktur von Buchen‐Urwäldern in Albanien im Vergleich mit deutschen Buchen‐Naturwaldreservaten und‐Wirtschaftswäldern, 2000). Location The Uholka‐Shyrokyi Luh primeval forest, Carpathian Biosphere Reserve Ukrainian Mountains. Methods was evaluated by examining requirements each type based on literature empirically assessing suitability typology...
We explored the spatial dynamics of structural complexity in living tree stratum a 10-ha stem-mapped portion an unmanaged nearly monospecific primaeval European beech (Fagus sylvatica L.) stand Western Ukraine. Development were assessed through patterns change association across scales (from 156.25 m2 to 1 ha) among basal area (BA), density, average and standard deviation (STD) diameters, Gini coefficient (GC), index aggregation (R), diameter differentiation (T) (SCI). At smallest scales,...