A5037544318- Forest ecology and management
- Forest Ecology and Biodiversity Studies
- Tree-ring climate responses
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Forest Insect Ecology and Management
- Botany and Plant Ecology Studies
- Forest Management and Policy
- Fire effects on ecosystems
- Species Distribution and Climate Change
- Rangeland and Wildlife Management
- Insect-Plant Interactions and Control
- Animal Ecology and Behavior Studies
- Landslides and related hazards
- Insect and Pesticide Research
- Conservation, Biodiversity, and Resource Management
- Mycorrhizal Fungi and Plant Interactions
- Botany, Ecology, and Taxonomy Studies
- Plant Pathogens and Fungal Diseases
- Remote Sensing in Agriculture
Czech University of Life Sciences Prague
2020-2024
Colorado State University
2016-2017
University of Wyoming
2011
University of Montana
2011
Summary Climate is widely assumed to influence physiological and demographic processes in trees, hence forest composition, biomass range limits. Growth trees an important barometer of climate change impacts on forests as growth highly correlated with other including tree mortality fecundity. We investigated the main drivers diameter for five common species occurring Rocky Mountains western United States using nonlinear regression methods. quantified at individual level from core samples...
Abstract Protecting structural features, such as tree‐related microhabitats (TreMs), is a cost‐effective tool crucial for biodiversity conservation applicable to large forested landscapes. Although the development of TreMs influenced by tree diameter, species, and vitality, relationships between age TreM profile remain poorly understood. Using tree‐ring‐based approach data set 8038 trees, we modeled effects age, site characteristics on richness occurrence across some most intact primary...
Summary Seed production by Picea engelmannii was monitored at 13 sites distributed across a ˜670 m elevation gradient for 40 years. Time series of annual seed output investigated evidence masting behaviour and trends in abundance over time. We used regression models likelihood framework to examine climate effects on critical periods the species' reproductive cycle. rigorously evaluated performance two gridded data sets, PRISM TopoWx, before using associated variables as predictors models....
With accelerating environmental change, understanding forest disturbance impacts on trade-offs between biodiversity and carbon dynamics is of high socio-economic importance. Most studies, however, have assessed immediate or short-term effects disturbance, while long-term remain poorly understood. Using a tree-ring-based approach, we analysed the effect 250 years disturbances present-day indicators in primary forests. Disturbance legacies spanning centuries shaped contemporary co-benefits...
Historical fire patterns in a subalpine forest of Rocky Mountain National Park were quantified from an analysis stand ages and fire-scarred trees. A comparatively detailed sample 3461 tree cores 212 scars was collected 9200-ha study area north Estes Park, Colorado. total 41 events identified the record. Annually precise dates, beginning 1533, include 22 high-severity crown fires, 7 low-severity surface 8 mixed-severity with both components. Fire rotation estimated for fires (7587 years) (346...
Plant traits are an expression of strategic tradeoffs in plant performance that determine variation allocation finite resources to alternate physiological functions. Climate factors interact with mediate tree survival. This study investigated survival dynamics Norway spruce (Picea abies) relation tree-level morphological during a prolonged multi-year outbreak the bark beetle, Ips typographus, Central Europe. We acquired datasets describing trait attributes individual using remote sensing and...
Abstract Assessing the impacts of natural disturbance on functioning complex forest systems are imperative in context global change. The unprecedented rate contemporary species extirpations, coupled with widely held expectations that future intensity will increase warming, highlights a need to better understand how processes structure habitat availability ecosystems. Standardised typologies tree-related microhabitats (TreMs) have been developed facilitate assessments resource for multiple...
Abstract Aims We examined differences in life span among the dominant tree species (spruce, Picea abies ; fir, Abies alba beech, Fagus sylvatica and maple, Acer pseudoplatanus ) across primary mountain forests of Europe. asked how disturbance history, lifetime growth patterns, environmental factors influence span. Locations Balkan Mountains, Carpathian Dinaric Mountains. Methods Annual ring widths from 20,600 cores were used to estimate spans, trends, history metrics. Mixed models examine...
Climate change is expected to intensify bark beetle population outbreaks in forests globally, affecting biodiversity and trajectories of change. Aspects individual tree resistance remain poorly quantified, particularly with regard the role phenolic compounds, hindering robust predictions forest response future conditions. In 2003, we conducted a mechanical wounding experiment Norway spruce that coincided an outbreak beetle, Ips typographus. We collected phloem samples from 97 trees monitored...
Abstract Certification requirements associated with the Sustainable Forestry Initiative include efforts to identify and protect occurrences of endangered plant species. Habitat models were constructed in this study using maximum entropy random forest algorithms generate independent predictions for four selected rare plants, Castilleja chambersii, Erythronium elegans, Filipendula occidentalis, Sidalcea nelsoniana, divergent physical environments. Explanatory variables used model occurrence...
Understanding temporal and spatial variations in historical disturbance regimes across intact, continuous, altitudinally diverse primary forest landscapes is extremely important to help forecast development adapt management an era of rapid environmental change. Because few complex remain Europe, previous research has largely described for individual types smaller isolated stands. We studied the largest, still relatively unexplored mountain landscape temperate Făgăraș Mountains Romania. To...
In recent decades, Central Europe has been affected by extreme droughts, altering forest structure and function with significant socio-economic consequences. Most European forests are used for timber production provide various ecosystem services as well habitat forest-dwelling species. To what extent these have impacted weather extremes poorly quantified. Moreover, drivers of drought resistance remain uncertain, potentially misleading predictions future development. this study, we analyzed...
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An observed acceleration of tree mortality rates in European forests has been attributed to the impacts climate change and extreme disturbances. Ecosystem recovery depends on regeneration success, but recruitment juveniles recognized as bottleneck development forests. We investigated potential importance biotic (canopy abundance, ungulate herbivory) abiotic (light, soil nutrients) factors limitation montane primary central Europe. used widely distributed forest inventory data (n = 348 plots)...
Mountain forests in Europe have experienced substantially elevated rates of climate warming relative to global average trends. However, we only a limited understanding relationships between and growth dynamics juvenile trees, despite the importance early life-stages development forest ecosystems. We used an expansive, international network inventory plots examine mechanisms regulating potential two ecologically dominant tree species, Norway spruce European beech. time series annual radial...