A5029996668- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Forest Ecology and Biodiversity Studies
- Forest Management and Policy
- Forest ecology and management
- Rangeland and Wildlife Management
- Forest Biomass Utilization and Management
- Species Distribution and Climate Change
- Botany and Plant Ecology Studies
- Peatlands and Wetlands Ecology
- Tree-ring climate responses
- Landslides and related hazards
- Plant Water Relations and Carbon Dynamics
- Lichen and fungal ecology
- Psychoanalysis and Psychopathology Research
- French Urban and Social Studies
- Geology and Paleoclimatology Research
- Remote Sensing and LiDAR Applications
- Plant Pathogenic Bacteria Studies
- Forest Insect Ecology and Management
- Wildlife Ecology and Conservation
- Seedling growth and survival studies
- Bryophyte Studies and Records
- African Botany and Ecology Studies
- Transactional Analysis in Psychotherapy
Université du Québec à Montréal
2015-2024
Université du Québec en Abitibi-Témiscamingue
2006-2024
Natural Sciences and Engineering Research Council
2000-2023
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2011-2015
Peuplements végétaux et bioagresseurs en milieu tropical
2011-2015
Université de Montréal
1989-2012
Université du littoral côte d'opale
2005-2007
Université Laval
1994-2005
Territoires
2003
Government of British Columbia
2002
<ja:p>The combination of certain features fire disturbance, notably frequency, size and severity, may be used to characterize the disturbance regime in any region boreal forest. As some consequences resemble effects industrial forest harvesting, conventional management is often considered as a that has similar those natural disturbances. Although analogy between ecosystems merit, it important recognise also its limitations. Short cycles generally described for do not appear universal;...
Although the concept of forest ecosystem management based on natural disturbance has generated a great deal interest, few concrete examples exist FEM principles being put into application. Silvicultural practices that emulate disturbances are proposed with from principal vegetation zones Quebec. With exception large-scale use careful logging to protect advanced regeneration in ecosystems generally controlled by fire, stand-level silvicultural currently used reasonably similar disturbances,...
Bird community response to both landscape-scale and local (forest types) changes in forest cover was studied three boreal mixed-wood landscapes modified by different types of disturbances: (1) a pre-industrial landscape where human settlement, agriculture, logging activities date back the early 1930s, (2) an industrial timber managed forest, (3) dominated natural disturbances. Birds were sampled at 459 sampling stations distributed among landscapes. Local habitat characteristics context...
Balsam fir (Abiesbalsamea (L.) Mill.) mortality caused by the last spruce budworm (Choristoneurafumiferana (Clem.)) outbreak (1970–1987) was studied in 624 sites belonging to a complex natural forest mosaic originating from different fires northwestern Quebec. Multiple regression analyses were used assess respective effects of stand structure, species composition, site characteristics, and composition surrounding on observed mortality. Mortality increase relation diameter trees, basal area...
The past decade has seen an increasing interest in forest management based on historical or natural disturbance dynamics. rationale is that favours landscape compositions and stand structures similar to those found historically should also maintain biodiversity essential ecological functions. In fire-dominated landscapes, this approach feasible only if current future fire frequencies are sufficiently low compared with the preindustrial frequency, so a substitution of by can occur without...
<ja:p>Boreal forest ecosystems are adapted to periodic disturbance, but there is widespread concern that conventional practises degrade plant communities. We examined vegetation diversity and composition after clearcut logging, mechanical chemical site preparation in eight 5- 12-yr old studies located southern boreal forests of British Columbia Quebec, Canada find useful indicators for monitoring ecosystem integrity provide recommendations the development testing new silvicultural...
Abstract. Plant species distributions are generally thought to be chiefly under environmental control, although they may affected by disturbance events or dispersion properties of the species. The relative importance these different factors is not easy evaluate because often share common spatial patterns, such that an inextricable network relationships occurs between plant distributions, conditions, and endogenous as propagule dispersion. In this paper we propose a method for untangling...
Abstract The 2023 wildfire season in Québec set records due to extreme warm and dry conditions, burning 4.5 million hectares indicating persistent escalating impacts associated with climate change. study reviews the unusual weather conditions that led fires, discussing their extensive on forest sector, fire management, boreal caribou habitats, particularly profound effects First Nation communities. wildfires significant declines productivity timber supply, overwhelming management resources,...
The 2023 wildfire season in Québec set records due to extreme warm and dry conditions, burning 4.5 million hectares indicating persistent escalating impacts associated with climate change. This study reviews the unusual weather conditions that led fires, discussing their extensive on forest sector, fire management, boreal caribou habitats, particularly profound effects First Nation communities. wildfires significant declines productivity timber supply, overwhelming management resources,...
Abstract. We present a simple empirical model that allows an estimation of mortality due to spruce budworm ( Choristoneura fumiferana ) outbreak in relation fire frequency and site characteristics. The occurrence recent around Lake Duparquet (48° 30’N, 79° 20’W, ca. 300 m a.s.l.) northwestern Québec permitted reconstruction the stand composition before outbreak, also Abies balsamea outbreak. basal area A. increases with time since all types but increasing values for (1) rock shallow till,...
On a small bay of the Chacopata lagoon complex in northeastern Venezuela, we analyzed temporal feeding activity patterns shorebirds and other water birds, determined factors or conditions related to these patterns. During daytime nighttime observations, measured abundance each species as well environmental (time, wind velocity, cloudiness, tide level, presence moonlight bioluminescence). A night vision module (light intensifier) was used during observations. Samples × matrices were...
Abstract Aim In managed forest landscapes, the tolerance of species to contemporary alteration cover is often assumed reflect their resilience natural disturbances. We tested this central tenet ecosystem‐based management by comparing structure bird assemblages among four regions with contrasting historical disturbance regimes. Location Canada's boreal and northern hardwood forests. Methods Using point count data from study across Canada, we first determined relative sensitivity individual...
Variation in canopy composition can influence ecosystem processes, such as nutrient cycling and light transmittance, even when environmental soil conditions are similar. To determine whether forest cover type influences species of the understory vegetation (herbs shrubs), this layer was studied on two different surface deposits, clay till, under four types dominated, respectively, by Populus tremuloïdes Michx. (aspen), Betula papyrifera Marsh. (white birch), Pinus banksiana Lamb. (jack...
Within Canada, and internationally, an increasing demand that forests be managed to maintain all resources has led the development of criteria indicators sustainable forest management. There is, however, a lack understanding, at operational scale, how evaluate compare management activities ensure sustainability resources. For example, nationally, many existing are too broad used directly local scale management; provincially, regulations often prescriptive rigid allow for adaptive...
Useful sampling guidelines have recently been provided to improve the precision of bird population parameter estimates from point count data. Less attention has given, however, issue accuracy or completeness counts at each point. While it may not be critical in studies that compare average among study plots, level individual points pose several problems assess relationships between response variables (species' occurrence abundance) and explanatory (vegetation structure, size isolation...
Flowering and fruiting phenology were studied for thorn woodland (annual precipitation of 1179 mm) scrub 578 stands in northeastern Venezuela. The global each vegetation type was assessed using multivariate techniques (ordination chronological clustering). All species their respective phenophases analyzed simultaneously. flowering trees tall shrubs occurred both types at the end dry season lasted throughout entire rainy season. Short-duration rains late may have triggered synchronized...
In this study, we characterised the composition and configuration of post-fire residual habitats belonging to two physiographic zones black spruce–moss domain in western Quebec. Thirty-three large fires (2000–52 000 ha) were selected extracted on classified Landsat satellite imagery. The results show that a minimum 2% maximum 22% burned areas escaped fire, with an overall average 10.4%. many forest patches partially or entirely fire formed (RHs). It was found although area RHs follows linear...
In February 2010, grapefruit (Citrus paradisi) and Mexican lime (C. aurantifolia) leaves with erumpent callus-like lesions were collected in Senegal the Sebikotane area between Dakar Thies. Similar symptoms have been observed by local farmers since 2008, morphologically similar to those of citrus canker caused Xanthomonas citri pv. (Asiatic canker) X. aurantifolii (South American canker). Lesions primarily reported from (cv. Shambar), which is most frequent species produced this area, lime,...