A5000874565- Soil Carbon and Nitrogen Dynamics
- Hydrology and Watershed Management Studies
- Peatlands and Wetlands Ecology
- Soil erosion and sediment transport
- Soil and Water Nutrient Dynamics
- Soil and Unsaturated Flow
- Forest Ecology and Biodiversity Studies
- Soil Geostatistics and Mapping
- Forest Management and Policy
- Fire effects on ecosystems
- Atmospheric and Environmental Gas Dynamics
- Geochemistry and Geologic Mapping
- Forest Biomass Utilization and Management
- Hydrology and Sediment Transport Processes
- Forest ecology and management
- Polymer-Based Agricultural Enhancements
- Clay minerals and soil interactions
- Water-Energy-Food Nexus Studies
- Tree Root and Stability Studies
- Seedling growth and survival studies
- Agroforestry and silvopastoral systems
- Geomagnetism and Paleomagnetism Studies
- Ecology and Vegetation Dynamics Studies
- Plant responses to elevated CO2
- Plant Growth Enhancement Techniques
Dalhousie University
2024
Government of Nova Scotia
2020-2022
Nova Scotia Department of Agriculture
2013-2018
Louisiana Department of Natural Resources
2016
University of New Brunswick
2000
Environment and Climate Change Canada
2000
Abstract Changing climates are altering the structural and functional components of forest ecosystems at an unprecedented rate. Simultaneously, we seeing a diversification public expectations on broader sustainable use resources beyond timber production. As result, science art silviculture needs to adapt these changing realities. In this piece, argue that silviculturists gradually shifting from application empirically derived silvicultural scenarios new sets approaches, methods practices,...
Zhao, Z., Ashraf, M. I., Keys, K. S. and Meng, F-R. 2013. Prediction of soil nutrient regime based on a model DEM-generated clay content for the province Nova Scotia, Canada. Can. J. Soil Sci. 93: 193–203. (SNR) maps are widely required by ecological studies as well forest growth yield assessment. Traditionally, SNR is assessed in field using vegetation indicators, topography properties. However, assessments expensive, time consuming not suitable producing high-resolution over large area....
A geospatial GIS-linked spreadsheet model (Nutrient Budget Model—Nova Scotia: NBM-NS) was developed for Nova Scotia to assess the long-term sustainability of forest harvest scenarios as constrained by primary nutrient inputs and outputs due atmospheric deposition, soil weathering, leaching. Harvest refer user-defined stand-specific removal rates bole wood, bark, branches, foliage, based on current or projected inventories. These are evaluated within context existing data layers climate (mean...
As the global human population and associated anthropogenic activities rapidly increase, so does areal extent of disturbed soils. Regulatory frameworks must incorporate reclamation criteria management options for these soils, requiring consistent descriptions interpretations. Many human-altered soils cannot be classified using current Canadian System Soil Classification (CSSC), thus an Anthroposolic order is proposed. Anthroposols are that highly modified or constructed by activity, with one...
ABSTRACT: We examined hydrogeochemical records for a dozen watersheds in and near Kejimkujik National Park southwestern Nova Scotia by relating stream ion concentrations fluxes to atmospheric deposition, type (lake inlet versus outlet; brown clear water), watershed (catchment area, topography, soils, dominant forest cover type). found that fog dry deposition make important contributions S, N, Cl, H, Ca, Mg, K, Na inputs into these watersheds. Seasalt chloride from rain, snow, fog, equal...
Hydrological processes and conditions were quantified for the Mersey River Basin (two basins: one exiting below Mill Falls, George Lake), Roger's Brook Basin, Moosepit Brook, other selected locations at near Kejimkujik National Park in Nova Scotia, Canada, from 1967 to 1990. Addressed variables included precipitation (rain, snow, fog), air temperature, stream discharge, snowpack accumulations, throughfall, soil subsoil moisture, temperature frost, a monthly resolution. It was found that per...
Abstract Delays in forest recovery from terrestrial acidification combined with climate change are leading Acadian Forest ecosystems into new territory. The Kejimkujik Calibrated Catchments (KCC) Study Program was established and adjacent to National Park Historic Site (KNP) Southwest Nova Scotia (SWNS), Canada, the late 1970s study impacts of acid precipitation on pristine vulnerable ecosystems. KCC now have one longest continuously monitored water chemistry records North America, data...
Abstract A consequence of past acid rain events has been chronic acidification both Nova Scotian forests and watersheds, leading to a loss essential nutrients subsequently decreased forest productivity biodiversity. Liming – supplementing with crushed rock (dolomite, limestone, or basalt) can restore acidified soils as well increasing the pH carbon capture by promotion tree growth. The effectiveness liming treatments have often assessed biologically through growth measurements, but...
Two forest soil B-horizons were amended with alkaline-treated biosolids (ATB), powdered agricultural lime, and wood fly ash under controlled conditions to compare initial ion availabilities over a 10-week period. ATB was most effective in supplying available Ca 2+ but least Mg , for which lime effective. Availability of K + SO 4 2– -S greatest soils because high S loading rates the electrical conductivity this amendment. Mineral N (NO 3 – -N NH -N) availability increased soils, stayed same...
Keys, K., Sterling, S. M. and Guan, Y. 2015. Using historic soil survey data to map water erosion hazard for land-use planning in Nova Scotia. Can. J. Soil Sci. 95: 299–304. A fine-scale digital layer Scotia was combined with information elevation (DEM) generate a new based on inherent erodibility slope class. Results showed approximately 62% of has low hazard, 33% moderate 5% high hazard. The subsequently used provincial watershed assessment program (NSWAP) potential quality stressors...
While forest management commonly seeks to increase carbon (C) capture and sequestration, in some settings, a high density of C storage may be detrimental other land uses ecosystem services. We study forested, drinking-water-supply watershed determine the effects on with implicit understanding that greater will lead increased quantity exported hydrologically into source-water reservoir. Using custom implementation CBM-CFS3, Canadian model simulate transformations movement forested systems,...
Delays in forest recovery from terrestrial acidification combined with climate change is leading Acadian Forest ecosystems into new territory. Kejimkujik Calibrated Catchments (KCC) Study Program was established an around National Park and Historic Site (KNPHS) Southwest Nova Scotia (SWNS) the late 1970s to increase our understanding of impacts acid precipitation on relatively pristine ecosystems. KCC now have one longest continuously monitored water chemistry records North America, data...
<p>Decades of acid deposition across northeastern North America has caused excess leaching soil base cations (Ca<sup>2+</sup>, Mg<sup>2+</sup>, K<sup>+</sup>) and increases in bioavailable aluminum (Al<sup>3+</sup>) that, combination, have resulted widespread decreases potential forest productivity. Despite major reductions SO<sub>2</sub>...