ESSA has over 15 years of experience with statistical analysis of ecological datasets, including quantitative and qualitative analyses of forest inventory data for model development and fitting. Our experience also includes the application of multivariate methods for applying limited inventory over large landscapes.
Many of our projects fall at the boundary of forestry, watershed and fisheries sciences, and can be divided into four basic categories: data analysis, experimental design, stochastic simulation modeling, and monitoring/sampling design.
Data analysis projects have included trend analyses for a variety of species, regression analyses to inform habitat suitability models for salmonids in BC and sightability of redds in Idaho, and Classification and Regression Tree (CART) analyses of watershed rankings.
Design of experiment projects have included the use of fractional factorial designs to reduce the number of trials in a complex fire simulation, and designing studies to assess the effect of multiple factors on impingement /entrainment at a nuclear facility.
Simulation modelling has been used to assess alternative sampling strategies for outmigrating smolts, to estimate roadside mortality of birds in Canada, and to evaluate alternative fire management strategies.
Monitoring/sampling projects include Wildlife Habitat Areas in BC, the Trinity River Restoration Program in California (aquatic and riparian monitoring), enhancement projects in Dry Creek California, Fisheries Sensitive Watersheds in BC, Williamson’s Sapsucker in BC, Recovery Monitoring and Evaluation Guidance for bull trout (RMEG), and guidance for the Collaborative System-wide Monitoring and Evaluation Project (CSMEP) in the Columbia River Basin.
ESSA’s analytical team provides extensive in house data management expertise and coordinates with our systems ecologists to facilitate analyses. We are experienced with a variety of statistical software packages including: SAS, JMP, S-plus, and R. Additionally, our statisticians are educated in ecology and are highly experienced at the effective communication of complex ideas in graphical and written form.