A5041060574- Fire effects on ecosystems
- Soil Carbon and Nitrogen Dynamics
- Ecology and Vegetation Dynamics Studies
- Peatlands and Wetlands Ecology
- Forest Ecology and Biodiversity Studies
- Forest ecology and management
- Soil erosion and sediment transport
- Lichen and fungal ecology
- Botany and Plant Ecology Studies
- Soil Geostatistics and Mapping
- Geology and Paleoclimatology Research
- Soil and Water Nutrient Dynamics
- Paleontology and Stratigraphy of Fossils
- Diatoms and Algae Research
- Marine animal studies overview
- Mycorrhizal Fungi and Plant Interactions
- Rangeland and Wildlife Management
- Seedling growth and survival studies
- Wildlife Ecology and Conservation
Ministère des Ressources naturelles et des Forêts
2017-2018
Université du Québec en Abitibi-Témiscamingue
2004-2006
Natural Sciences and Engineering Research Council
2005-2006
Center for Northern Studies
2005
Université du Québec à Montréal
2005
Université Laval
2005
Université du Québec
2002
Ectomycorrhizal (ECM) diversity was measured in 12 mixed‐wood stands the Abitibi region of north‐western Québec. Stands were similar age and situated on mineral soil deposits, but supported varying proportions ECM host trees. Host roots sampled a manner that enabled their separation into species basis wood anatomy. Shannon indices for colonizing each determined The overstory trees, understory plants roots, as well tree composition, root density pertinent abiotic factors used independent...
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...
In the southeastern boreal forest of Canada, presence mixed stands black spruce (Picea mariana (Mill.) BSP) and trembling aspen (Populus tremuloides Michx.) growing in similar abiotic conditions offers opportunity to study influence on stand volume growth. A regression analysis performed field data from ministère des Ressources naturelles du Québec showed a significant relationship between relative basal area (aspen was determined by ratio total stand) merchantable after accounting for...
<ja:p>Forest overstory composition influences both light and nutrient availability in the mixed boreal forest. The influence of stand on understory cover biomass was investigated two soil types (clay till deposits). Four forest were considered this study: aspen (Populus tremuloides Michx.), paper birch (Betula papyrifera Marsh.), jack pine (Pinus banksiana Lamb.) a mixture balsam-fir (Abies balsamea (L.) Mill.) white spruce (Picea glauca (Moench) Voss). all species recorded while important...
Although various conceptual models exist to explain the pattern of diversity along a productivity gradient, studies forest understory vegetation natural gradient are often confounded with changes in overstory cover types. We investigated how composition, cover, structure, and change 60 monodominant Populus stands northeastern British Columbia. A partial canonical correspondence analysis indicated that composition was significantly related aspen site index dominant tree height at...
Globally, soil anoxia and water table rise play a role in the development of peatlands from forests. Cited causes have included diversity internal external mechanisms, including Sphagnum feather mosses, hardpan development, peatland expansion. The objectives this study were to examine depth black spruce stands Clay Belt Quebec Ontario, associate changes with potential stand scale causal factors (primarily biological). A methodological issue, link between oxygen zone table, was also...
:Soil quality in the boreal mixedwood forest depends to a certain extent on chemical, biochemical, and microbial properties of floor. Given that floors are composed mainly decomposing plant detritus, composition (i.e., stand type) should play key role determining soil quality. Stand age is also expected control floor properties, due balance amount substrates introduced into, lost from, during development. Finally, mineral parent material be related some by controlling site nutrient capital...
Cette étude utilise une approche paléolimnologique pour reconstituer l'histoire trophique du réservoir d'eau potable de la Communauté Urbaine Québec (CUQ), le lac Saint-Charles. Ce manifeste présentement un manque d'oxygène près fond à fin stratification estivale et hivernale. L'étude révèle des changements dans communauté diatomifère fossile depuis environ les 150 dernières années. L'événement ayant entraîné plus biologiques physico-chimiques bassin est transformation hydrologique engendrée...
Soil data and soil mapping are indispensable tools in sustainable forest management. In northern boreal ecosystems, paludification is defined as the accumulation of partially decomposed organic matter over saturated mineral soils, a process that reduces tree regeneration growth. Given this negative effect on productivity, spatial prediction black spruce stands important This paper provides description database to predict layer thickness (OLT) proxy northeastern Canada. The contains 13,944...