A5069812377- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Animal Behavior and Reproduction
- Rangeland and Wildlife Management
- Animal Ecology and Behavior Studies
- Fire effects on ecosystems
- Plant and animal studies
- Fish Ecology and Management Studies
- Bird parasitology and diseases
- Forest Insect Ecology and Management
- Climate variability and models
- Forest Ecology and Biodiversity Studies
- Genetic diversity and population structure
- Animal Vocal Communication and Behavior
- Wildlife-Road Interactions and Conservation
- Marine animal studies overview
- Amphibian and Reptile Biology
- Land Use and Ecosystem Services
- Genetic and phenotypic traits in livestock
- Economic and Environmental Valuation
- Forest ecology and management
- Animal Nutrition and Physiology
- Ecology and biodiversity studies
Environment and Climate Change Canada
2015-2025
University of British Columbia
2016-2025
Colorado State University
2024
Government of Canada
2021
Rhode Island College
2021
Canadian Sport Centre Pacific
2019
Red Universitaria Nacional
2016
Forest Research
2012
Government of British Columbia
2007
Library and Archives Canada
2007
Snowshoe hare populations in the boreal forests of North America go through 10-year cycles. Supplemental food and mammalian predator abundance were manipulated a factorial design on 1-square-kilometer areas for 8 years Yukon. Two blocks forest fertilized to test nutrient effects. Predator exclosure doubled addition tripled density during cyclic peak decline. combined with increased 11-fold. Added nutrients plant growth but not density. Food predation together had more than additive effect,...
Melles, S., S. M. Glenn and K. Martin 2003. Urban Bird Diversity Landscape Complexity: Species–environment Associations Along a Multiscale Habitat Gradient. Conservation Ecology 7(1):5. https://doi.org/10.5751/ES-00478-070105
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,...
The mixed forests of interior British Columbia, Canada, support a rich community cavity nesters, accounting for about one-third forest vertebrate species. For 20 cavity-nesting bird and six mammal species, representing excavators secondary we measured nest-cavity nest-tree characteristics over 8 years in Interior Douglas-fir (Pseudotsuga menziesii) ecosystems. There was overwhelming selection quaking aspen (Populus tremuloides); 95% 1692 nests were aspen, which comprised only 15% trees...
SYNOPSIS. The majority of bird species exhibit age-dependent survival and reproduction. In almost all cases, first time breeders or young individuals perform at a lower slower rate than older individuals. This review highlights the importance effects urges further study proximate ultimate mechanisms involved. Age show substantive variation across life history stage, breeding season, year, cohort, habitat types environmental conditions both within taxons. some populations years, age...
We measured the density changes of 22 species vertebrates during a snowshoe cycle in northern Canada. Hares were dominant herbivore system and their numbers correlated with arctic ground squirrel, spruce grouse, ptarmigan, lynx, coyote, great horned owl, goshawk, raven hawk owl. Hare not red-backed vole which showed peaks low, increase, early decline phases hare cycle. Hawk owls only predator whose voles while boreal weasels densities Microtus. Red American kestrel, red-tailed hawk, harrier,...
As ground nesting homeotherms, alpine and arctic birds must meet similar physiological requirements for breeding as other birds, but do so in more extreme conditions. Annual spring snowfall timing of snow melt can vary by up to 1 month daily temperatures near the surface from below freezing over 45°C habitats. Species these environments have various behavioral, physiological, morphological adaptations cope with energetically demanding We review ways harsh variable weather, present data long...
Background. We wanted to assess the efficiency of instituting a modified technique percutaneous tracheostomy (PET) with bronchoscopic guidance. Methods. During 10-month period 48 consecutive trauma patients requiring were divided between standard control group (ST) and PET group. All followed prospectively. The hospital charges reviewed retrospectively. Results. Age, gender, body habitus, principal diagnosis similar in 21 ST 27 patients. STs 15 PETs performed operating room (OR), 12...
Abstract The mixed forests of interior British Columbia, Canada, support a rich community cavity nesters, accounting for about one-third forest vertebrate species. For 20 cavity-nesting bird and six mammal species, representing excavators secondary we measured nest-cavity nest-tree characteristics over 8 years in Interior Douglas-fir (Pseudotsuga menziesii) ecosystems. There was overwhelming selection quaking aspen (Populus tremuloides); 95% 1692 nests were aspen, which comprised only 15%...
1. Elevational gradients create environmental variation that is hypothesized to promote in life-history strategies. We tested whether differences strategies were associated with elevation a songbird, the dark-eyed junco (Junco hyemalis; Aves; A.O.U. 1998). 2. monitored birds four replicated sites per elevation, at 2000 m a.s.l. (high elevation) and 1000 (low elevation), Rocky Mountains of Canada. 3. Over 5 years, we measured following traits vital rates: egg-laying schedules, morphological...
Abstract Aim Globally, many bird species nest in tree cavities that are either excavated or formed through decay damage processes. We assembled an overview of all tree‐cavity nesters (excavators and non‐excavators) the world, analysed their geographic distribution listed conservation status species. Location This is a global analysis from every continent except for Antarctica where lack trees precludes occurrence this group. Methods reviewed online version Handbook Birds World Alive,...
Most obligate cavity-nesting birds are considered to be nest-site limited, either by time or energy excavate acquire suitable holes for nesting. We examined rates of nest-cavity reuse a rich community in mixed forests interior British Columbia. Using sample 402 cavity-reuse cases over five years, we measured cavity 20 bird and mammal species (three guilds), the relationship between features cavities, nest trees, forest stands. Eight percent used cavities were destroyed years. Reuse 17% weak...