A5062577882- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Forest Management and Policy
- Forest Ecology and Biodiversity Studies
- Forest ecology and management
- Forest Insect Ecology and Management
- Plant Water Relations and Carbon Dynamics
- Botany and Plant Ecology Studies
- Rangeland and Wildlife Management
- Seedling growth and survival studies
- Tree-ring climate responses
- Land Use and Ecosystem Services
- Species Distribution and Climate Change
- Plant responses to elevated CO2
- Conservation, Biodiversity, and Resource Management
- Economic and Environmental Valuation
- Coal and Its By-products
- Lichen and fungal ecology
- Ecosystem dynamics and resilience
- Clay minerals and soil interactions
- Forest Biomass Utilization and Management
- Invertebrate Taxonomy and Ecology
- Plant and animal studies
- Landslides and related hazards
- Fern and Epiphyte Biology
University of Northern British Columbia
2013-2024
Canadian Forest Service
2004-2014
Natural Resources Canada
2006-2014
University of British Columbia
1991-2012
Kamloops Art Gallery
2006
Forestry Research Centre
2004
Carleton University
2001
Harvard University
1991-1999
University of Illinois Urbana-Champaign
1991
Illinois Archaeological Survey
1987
Abstract: Although forest edges have been studied extensively as an important consequence of fragmentation, a unifying theory edge influence has yet to be developed. Our objective was take steps toward the development such by (1) synthesizing current knowledge patterns structure and composition at anthropogenically created edges, (2) developing hypotheses about magnitude distance that consider ecological processes influencing these patterns, (3) identifying needs for future research. We...
Logging to "salvage" economic returns from forests affected by natural disturbances has become increasingly prevalent globally. Despite potential negative effects on biodiversity, salvage logging is often conducted, even in areas otherwise excluded and reserved for nature conservation, inter alia because strategic priorities post-disturbance management are widely lacking.A review of the existing literature revealed that most studies investigating biodiversity have been conducted less than 5...
Salvage logging - removing trees from a forested area in the wake of catastrophic event such as wildfire or hurricane is highly controversial. Policymakers and those with an economic interest harvesting typically argue that damaged areas should be logged so to avoid wasting resources, while many forest ecologists contend following disturbance harmful variety species can interfere natural process ecosystem recovery.Salvage Logging Its Ecological Consequences brings together three leading...
Complex systems science provides a transdisciplinary framework to study characterized by (1) heterogeneity, (2) hierarchy, (3) self‐organization, (4) openness, (5) adaptation, (6) memory, (7) non‐linearity, and (8) uncertainty. thinking has inspired both theory applied strategies for improving ecosystem resilience adaptability, but applications in forest ecology management are just beginning emerge. We review the properties of complex using four well‐studied biomes (temperate, boreal,...
Broad-scale fire regime modelling is frequently based on large ecological and (or) administrative units. However, these units may not capture spatial heterogeneity in regimes thus lead to spatially inaccurate estimates of future activity. In this study, we defined homogeneous (HFR) zones for Canada annual area burned (AAB) occurrence (FireOcc), used them model (2011–2040, 2041–2070, 2071–2100) activity using multivariate adaptive regression splines (MARS). We identified a total 16 HFR...
The concept of biological diversity (biodiversity) is reviewed, with special attention to its measurement and natural trends. While generalizations regarding the necessity biodiversity need be interpreted caution, it argued that should protected in more ecosystem landscape reserves, a reasonable management objective on timber lands as well. Maintaining important because we cannot always identify which individual species are critical sustainability, nor may useful mankind future. Many wild...
The present study undertook a hierarchical analysis of the variability within and among some individual fire events in boreal ecozones Canada Alaska. When stratified by ecozone, differences spatial temporal distribution wildfires were observed Canadian Large Fire Data Base that reflect climatic, terrain land-use across country. Remote-sensing data collected before after forest fires permitted rigorous burn severity events, identification certain fire-prone more fire-resistant land-cover...
Abstract Global change has been accompanied by recent increases in the frequency and intensity of various ecological disturbances (e.g., fires, floods, cyclones), both natural anthropogenic origin. Because these often interact, their cumulative synergistic effects can result unforeseen consequences, such as insect outbreaks, crop failure, progressive ecosystem degradation. We consider roles biological legacies, thresholds, lag responsible for distinctive impacts interacting disturbances....
Disturbance regimes are changing in forests across the world response to global climate change. Despite profound impacts of disturbances on ecosystem services and biodiversity, assessments at scale remain scarce. Here, we analyzed natural boreal temperate forest ecosystems for period 2001–2014, aiming 1) quantify their within‐ between‐biome variation 2) compare sensitivity biomes. We studied 103 unmanaged landscapes with a total land area 28.2 × 10 6 ha, distributed five continents. A...
Climate change is affecting Canada’s boreal zone, which includes most of the country’s managed forests. The impacts climate in this zone are expected to be pervasive and will require adaptation forest management system. This paper reviews potential actions strategies for system, considering current projected their related vulnerabilities. These vulnerabilities include regional increases disturbance rates, changes productivity, increased variability timber supply, decreased socioeconomic...
We celebrate the 50th anniversary of Canadian Journal Forest Research by reflecting on considerable progress accomplished in select areas wildland fire science over past half century. Specifically, we discuss key developments and contributions creation Fire Danger Rating System; relationships between weather, climate, climate change; ecology; operational decision support; management. also evolution management Banff National Park as a case study. conclude discussing some possible directions...
Various measurements of the abundance, proximity, and stature neighbouring plants are utilized as indices competitive intensity experienced by crop trees. These can be useful in assessing desirability vegetation control stand thinnings, simulating development. Static competition indices, however, have fundamental limitations which should more widely considered. Competition is usually a constraint to growth, not determinant so any measurement alone fundamentally limited its ability predict...
Twenty 100—m 2 plot in a forest dominated by tree fern (Cibotium spp.) and ohia (Metrosideros polymorpha) on the island of Hawaii were subjected to different degrees canopy removal. Seedlings growing control plots received an average 10% full irradiance, whereas those completely cleared 43% irradiance. Invasion Metrosideros seedlings into averaged more than three times that undisturbed forest. These open—born grew height 3.5 cm/yr, 80% comparably sized had started life shade higher...
Abstract Does logging affect the fire proneness of forests? This question often arises after major wildfires, but data suggest that answers differ substantially among different types forest. Logging can alter key attributes forests by changing microclimates, stand structure and species composition, fuel characteristics, prevalence ignition points, patterns landscape cover. These changes may make some kinds more prone to increased probability severity. Such include tropical rainforests where...
Insights into field-planted conifer seedling growth were gained by fitting height and diameter to relative irradiance over the growing season using Michaelis-Menten functions. There was little difference among tree species (Abies lasiocarpa (Hook.) Nutt., Picea glauca (Moench) Voss × sitchensis (Bong.) Carr., Pinus contorta Dougl. ex Loud., Thuja plicata Donn D. Don, Tsuga heterophylla (Raf.) Sarg.) in response ambient light. No significant differences whole-plant compensation points...
The ability of national and multipurpose ecological classification systems to provide an optimal zonation for a fire regime is questionable. Using wildfire (>1 ha) point data the 1980–99 period, we defined zones with homogeneous (HFR) across Canada assessed how these differ from National Ecological Framework (NEFC) units corresponding scale, i.e. ecoprovinces. Two HFR zonations were produced through spatially constrained clustering (i) 1600-km2 cells (ii) smallest NEFC system,...