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Search: authors:"Michael A. Wulder"

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A thirty year, fine-scale, characterization of area burned in Canadian forests shows evidence of regionally increasing trends in the last decade

Coops. Author Contributions Conceptualization: Nicholas C. Coops, Txomin Hermosilla, Michael A. Wulder, Joanne C. White. Formal analysis: Nicholas C. Coops, Michael A. Wulder, Joanne C. White, Douglas ... K. Bolton. Investigation: Nicholas C. Coops, Txomin Hermosilla, Michael A. Wulder, Joanne C. White, Douglas K. Bolton. Methodology: Nicholas C. Coops, Txomin Hermosilla, Michael A. Wulder, Joanne C

Estimating changes in lichen mat volume through time and related effects on barren ground caribou (Rangifer tarandus groenlandicus) movement

Lichens form a critical portion of barren ground caribou (Rangifer tarandus groenlandicus) diets, especially during winter months. Here, we assess lichen mat volume across five herd ranges in the Northwest Territories and Nunavut, Canada, using newly developed composite Landsat imagery. The lichen volume estimator (LVE) was adapted for use across 700 000 km2 of barren ground...

Forest Connectivity Regions of Canada Using Circuit Theory and Image Analysis

Ecological processes are increasingly well understood over smaller areas, yet information regarding interconnections and the hierarchical nature of ecosystems remains less studied and understood. Information on connectivity over large areas with high resolution source information provides for both local detail and regional context. The emerging capacity to apply circuit theory to...

Applying Circuit Theory for Corridor Expansion and Management at Regional Scales: Tiling, Pinch Points, and Omnidirectional Connectivity

Connectivity models are useful tools that improve the ability of researchers and managers to plan land use for conservation and preservation. Most connectivity models function in a point-to-point or patch-to-patch fashion, limiting their use for assessing connectivity over very large areas. In large or highly fragmented systems, there may be so many habitat patches of interest...

Multiscale satellite and spatial information and analysis framework in support of a large-area forest monitoring and inventory update

Michael A. Wulder Joanne C. White Mark D. Gillis Nick Walsworth Matthew C. Hansen Peter Potapov Many countries undertake a national forest inventory to enable statistically valid monitoring in

Using digital time-lapse cameras to monitor species-specific understorey and overstorey phenology in support of wildlife habitat assessment

Critical to habitat management is the understanding of not only the location of animal food resources, but also the timing of their availability. Grizzly bear (Ursus arctos) diets, for example, shift seasonally as different vegetation species enter key phenological phases. In this paper, we describe the use of a network of seven ground-based digital camera systems to monitor...

Implications of differing input data sources and approaches upon forest carbon stock estimation

Site index is an important forest inventory attribute that relates productivity and growth expectation of forests over time. In forest inventory programs, site index is used in conjunction with other forest inventory attributes (i.e., height, age) for the estimation of stand volume. In turn, stand volumes are used to estimate biomass (and biomass components) and enable conversion...