A5007238812- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Forest Ecology and Biodiversity Studies
- Forest Management and Policy
- Forest ecology and management
- Forest Insect Ecology and Management
- Scheduling and Timetabling Solutions
- Lichen and fungal ecology
- Plant Water Relations and Carbon Dynamics
- Product Development and Customization
- Supply Chain and Inventory Management
- Bryophyte Studies and Records
- Species Distribution and Climate Change
- Sustainable Supply Chain Management
- Botany and Plant Ecology Studies
- Non-Destructive Testing Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Rangeland and Wildlife Management
- Forest Biomass Utilization and Management
- Nuclear Physics and Applications
- Advanced Graph Theory Research
- Vehicle Routing Optimization Methods
- Scheduling and Optimization Algorithms
- Electrochemical Analysis and Applications
- Aquatic Invertebrate Ecology and Behavior
Université Laval
2013-2024
Ministère des Ressources naturelles et des Forêts
2009-2021
Ecological Society of America
2018
John Wiley & Sons (United States)
2018
Centre hospitalier universitaire de Québec
2005-2016
Natural Sciences and Engineering Research Council
2010-2016
Ministry of Natural Resources and Wildlife
2011-2013
Ministry of Natural Resources and Forestry
2013
Forêt Méditerranéenne
2011
École Polytechnique
2009
We evaluated geographic variations in mean fire return intervals and postfire forest succession within a 66 497 km 2 land area located the eastern Quebec boreal forest. Fire were calculated using time since last map for 1800–2000, dynamics studied by superimposing 3204 inventory plots onto map. Mean interval proved significantly shorter western part of study area, at 270 years, compared with part, where it was probably more than 500 years. The two main tree species balsam fir ( Abies...
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...
In order to assess the long-term spatiotemporal influence of spruce budworm in sub-boreal mixedwood forests, we studied effect three successive outbreaks a region western Quebec, Canada. We used dendrochronology detect past areas (111–185 ha), based on recruitment age balsam fir (Abies balsamea) and growth patterns white (Picea glauca), two main host species this defoliating insect. also series aerial photographs taken between 1935 2003 evaluate overstory mortality post-outbreak succession...
In this paper, we study the split delivery vehicle routing problem with time windows (SDVRPTW) that is a variant of well-known (VRPTW), where each customer can be served by more than one vehicle. We propose enhancement procedures for exact branch-and-price-and-cut algorithm was recently developed SDVRPTW. particular, introduce tabu search to solve column-generation subproblem, extensions several classes valid inequalities, and new separation k-path inequalities. Computational results show...
Natural disturbances are fundamental to forest ecosystem dynamics and have been used for two decades improve management, notably in the boreal forest. Initially based on fire regimes, there is now a need extend concept include other types of as they can greatly contribute some regions zone. Here we review main descriptors—that is, severity, specificity, spatial temporal descriptors legacies, windthrow spruce bud worm outbreak disturbance regimes forests—in order facilitate incorporating them...
Many modelling approaches have been developed to project climate change impacts on forests. By analysing 'comparable' yet distinct variables (e.g. productivity, growth, dominance, biomass, etc.) through different structures, parameterizations and assumptions, models can yield outcomes rather similar initial questions. This variability lead some confusion for forest managers when developing strategies adapt management change. In this study, we standardized results from seven (Habitat...
Tree-ring time series provide long-term, annually resolved information on the growth of trees. When sampled in a systematic context, tree-ring data can be scaled to estimate forest carbon capture and storage landscapes, biomes, and-ultimately-the globe. A effort sample tree rings national inventories would yield unprecedented temporal spatial resolution dynamics help resolve key scientific uncertainties, which we highlight terms evidence for greening (enhanced growth) versus browning...
Springtails (Collembola) inhabit soils from the Arctic to Antarctic and comprise an estimated ~32% of all terrestrial arthropods on Earth. Here, we present a global, spatially-explicit database springtail communities that includes 249,912 occurrences 44,999 samples 2,990 sites. These data are mainly raw sample-level records at species level collected predominantly private archives authors were quality-controlled taxonomically-standardised. Despite covering continents, most come European...
The frequency of stand-replacing windthrow has rarely been evaluated over large spatio-temporal scales in boreal forests. This study examines that occurred within a forested area 3 061 000 ha, both at the regional scale and individual events. We specifically examined covered least 5 ha for which mortality affected >75% pre-windthrow canopy cover. At scale, we found affected, on average, 0.0255% per year between 1971 2000. Logistic regressions indicate stand age was most important...
We evaluated spruce budworm ( Choristoneura fumiferana (Clem.)) outbreak effects in nine study areas (60–86 ha each) located the boreal forest of eastern Quebec (Canada). In each area, were measured from vegetation plots, dominant canopy and understory tree age structures, retrospective analysis aerial photographs, defoliation records, host growth reductions (dendrochronology). Large-scale synchronous outbreaks detected across region around years 1880, 1915, 1950, 1980. Overall, contrarily...
Abstract Climate change is altering phenology; however, the magnitude of this varies among taxa. Compared with phenological mismatch between plants and herbivores, synchronization due to climate has been less explored, despite its potential implications for trophic interactions. The earlier budburst induced by defoliation a strategy against herbivores. Here, we tested whether warming can counteract defoliation‐induced increasing herbivore‐plant synchrony. We compared larval phenology spruce...
In theory, linkages between hierarchical forest management planning levels ensure coherent disaggregation of long-term wood supply allocation as input for short-term demand-driven harvest planning. practice, these may be ineffective, and solutions produced incoherent in terms volume value-creation potential harvested timber. Systematic incoherence planned implemented activities induce drift system state (i.e., divergence actual trajectories), thus compromising credibility performance the...
Understanding the mechanisms that cause large-scale synchrony in insect population dynamics might yield key insights for predicting potential outbreak occurrence. Here, we evaluated which environmental factors best explain synchronous fluctuations spruce budworm (Choristoneura fumiferana Clem.) (SBW), a major defoliator of coniferous forests North America. SBW levels were assessed with pheromone traps during 1986–2014 period across 625 000 km 2 territory located province Québec (Canada). The...
The objective of this project was to assess the importance pristine forests in maintaining botanical biodiversity humid boreal balsam fir forest eastern Canada. study based on a comparative analysis silviculturally mature second-growth stands and at two stages development (senescent old growth) Gaspé Peninsula. structure composition described, abundance structural attributes evaluated. communities nonvascular plant species (mosses, liverworts), lichens, saprophytic fungi were compared....
The effects of 20th century spruce budworm ( Choristoneura fumiferana (Clem.)) outbreaks on forest dynamics was examined in the southern and northern parts mixedwood zone central Quebec, Canada. In each region, three study areas were placed unmanaged stands that had not burned for more than 200 years. Disturbance impacts succession evaluated using aerial photographs dendrochronology. Spruce occurred around 1910, 1950, 1980 both regions. 1910 outbreak seemed to have limited impact regions,...
Despite the need for climate change mitigation and altered forest management practices, little is known about impacts of silvicultural practices such as partial-cuts clear-cuts on ecosystem carbon (C) dynamics. Specifically, effect these two overstory treatments C pools other than aboveground biomass trees remains poorly understood. Here, stocks were estimated a northern temperate mixed located in eastern Québec, Canada, five years after clear-cutting partial-cutting, either with or without...