A5006613774- Geology and Paleoclimatology Research
- Soil Carbon and Nitrogen Dynamics
- Climate change and permafrost
- Forest ecology and management
- Seedling growth and survival studies
- Heavy metals in environment
- Fire effects on ecosystems
- Soil and Water Nutrient Dynamics
- Peatlands and Wetlands Ecology
- Clay minerals and soil interactions
- Lichen and fungal ecology
- Pleistocene-Era Hominins and Archaeology
- Rangeland and Wildlife Management
- Geological formations and processes
- Forest Ecology and Biodiversity Studies
- Soil and Unsaturated Flow
- Cryospheric studies and observations
- Indigenous Studies and Ecology
- Landslides and related hazards
- Ecology and Vegetation Dynamics Studies
- Invertebrate Taxonomy and Ecology
- Forest Biomass Utilization and Management
- Geochemistry and Elemental Analysis
- Agroforestry and silvopastoral systems
- Radioactivity and Radon Measurements
University of Northern British Columbia
2014-2023
Tula Foundation
2017-2021
Hakai Institute
2020
Victoria Heart Institute Foundation
2020
Government of British Columbia
1999-2011
University of Calgary
2011
University of British Columbia
1989
University of Alberta
1983-1989
University of Washington
1983
Soil provides ecosystem services, supports human health and habitation, stores carbon regulates emissions of greenhouse gases. Unprecedented pressures on soil from degradation urbanization are threatening agro-ecological balances food security. It is important that we learn more about to sustainably manage preserve it for future generations. To this end, developed analyzed a global visible–near infrared (vis–NIR) spectral library. currently the largest most diverse database its kind. We show...
We examined fifth-year seedling response to soil disturbance and vegetation control at 42 experimental locations representing 25 replicated studies within the North American Long-Term Soil Productivity (LTSP) program. These share a common design while encompassing wide range of climate, site conditions, forest types. Whole-tree harvest had limited effects on planted performance compared with stem-only (the control); slight increases in survival were usually offset by decreases growth....
Sanborn, P., Lamontagne, L. and Hendershot, W. 2011. Podzolic soils of Canada : Genesis, distribution, classification. Can. J. Soil Sci. 91: 843–880. occupy 14.3% the Canadian landmass, occur in two widely separated areas, eastern (northern Ontario, Quebec, Maritimes) British Columbia, usually under coniferous forest on non-calcareous parent materials. Broad climatic control Podzol distribution properties is evident at national scale, with higher organic matter concentrations (Ferro-Humic...
Accurate soil organic carbon (SOC) maps are needed to predict the terrestrial SOC feedback climate change, one of largest remaining uncertainties in Earth system modeling. Over last decade, global scale models have produced varied predictions size and distribution stocks, ranging from 1000 >3000 Pg C within top 1 m. Regional assessments may help validate or improve because they can examine landscape controls on stocks offer a tractable means retain regionally-specific information, such as...
Soil properties in central and northeastern British Columbia are strongly influenced by parent materials because of geologically young till, glaciolacustrine, glaciofluvial deposits. We examined pedogenesis on various to support studies long-term forest productivity. sampled nine pedons developed till (Bobtail, Lucille Mountain, Skulow Lake, Log Topley, Kiskatinaw), (Bowron), glaciolacustrine (Aleza Lake 1, 2) The pedon is distinctive the occurrence talc, while Mountain has only clay...
This study describes the main treatment effects of organic matter removal and compaction a split-plot effect competition control on mineral soil carbon (C) nitrogen (N) pools. Treatment C N pools are discussed for 19 sites across five locations (British Columbia, Northern Rocky Mountains, Pacific Southwest, Atlantic Gulf coasts) that part Long-Term Soil Productivity (LTSP) network were established over 5 years ago. The cover broad range types, climatic conditions, tree species. Most showed...
Sanborn, P., Lamontagne, L. and Hendershot, W. 2011. Podzolic soils of Canada : Genesis, distribution, classification. Can. J. Soil Sci. 91: 843-880. occupy 14.3% the Canadian landmass, occur in two widely separated areas, eastern (northern Ontario, Quebec, Maritimes) British Columbia, usually under coniferous forest on non-calcareous parent materials. Broad climatic control Podzol distribution properties is evident at national scale, with higher organic matter concentrations (Ferro-Humic...
Abstract. The perhumid region of the coastal temperate rainforest (CTR) Pacific North America is one wettest places on Earth and contains numerous small catchments that discharge freshwater high concentrations dissolved organic carbon (DOC) directly to ocean. However, empirical data flux composition DOC exported from these watersheds are scarce. We established monitoring stations at outlets seven Calvert Hecate islands, British Columbia, which represent rain-dominated hypermaritime CTR. Over...
Carbon (C) stocks were assessed for hybrid interior spruce (Picea glauca (Moench) Voss × Picea engelmannii Parry ex Engelm.)-dominated upland forests within the Aleza Lake Research Forest in central British Columbia, Canada. Four old-growth (141250 years old) and four young second-growth (<20 forest plots established on two dominant soil texture types, coarse fine, a total of 16 plots. Mean C stands ranged from 423 Mg C·ha 1 (coarse) to 324 (fine), intermediate between Pacific Northwest...
Abstract Perennially frozen loess deposits in the Klondike goldfields include paleosols formed full-glacial environments, correlated by Alaskan distal tephra with Marine Isotope Stages (MIS) 2 and 4. Patterns of organic inorganic carbon clay distribution, microstructures, profile morphologies indicate that soil formation occurred a base-rich environment which matter accreted predominantly as root detritus. At sites approximately 20 km apart, expression cryoturbation ice wedge development...
Reductions in soil porosity through compaction and losses nutrients site organic matter removal are considered potentially detrimental effects of forest operations to productivity. Defining sustainable practices is complicated, however, by the possible contrasting responses commercial tree species these disturbances. We compared productivity foliar nitrogen (N) nutrition lodgepole pine ( Pinus contorta Dougl. ex Loud.) hybrid white spruce Picea glauca × engelmannii [Moench] Voss) at Year 12...
Accelerator radiocarbon dating of 147 charcoal samples recovered from colluvial and alluvial fan deposits at 29 sites was used to reconstruct the Holocene fire history an inland temperate rainforest watershed in east-central British Columbia (BC), Canada. Radiocarbon dates ranged 182 9558 cal. yr BP, with prominent peaks probability distribution calibrated e. 7100, 3900, 2300, 1600 250-1000 BP. The inferred median return interval (FRI) 800-1200 yr, depending on extent inbuilt age errors...
The aim of the present synthesis paper was to determine whether concentration changes and net release manganese (Mn), as related accumulated litter mass loss, are initial Mn concentration, mean annual temperature (MAT), precipitation (MAP), tree genus or species. We also examined limit values for decomposition MAT, MAP. compiled 84 foliar studies, conducted mainly in boreal temperate forest ecosystems, which dynamics had been well documented. Manganese amount were loss at each sampling time...
Abstract We present a multi‐proxy reconstruction from well‐preserved vegetation surface (ca. 32 000 14 C BP) the Fox Permafrost tunnel near Fairbanks, Alaska. A thick litter layer of plant material on is consistent with lacking evidence disturbance. Plant macrofossils and graminoid cuticle analysis show presence assemblage phytolith data. The pollen data indicate that trees were not local to site Artemisia sp. was in region. insect bryophyte reconstructions are vascular reconstruction,...
This study provides estimates of N 2 fixation in biological soil crusts (BSCs) from shrub–steppe grasslands British Columbia’s Chilcotin plateau. We identify key seasonal periods and environmental conditions during episodes BSC nitrogen-fixation activity. Predicted activity showed two peak periods: one late winter early spring snowmelt events, the second summer precipitation events. nitrogen fixation, especially activity, was quite variable year to year. The magnitude predicted at landscape...