Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Detecting Hot Spots Of Mountain Pine Beetle Infestations In The Forests Of British Columbia: An Approach Using Local Spatial Autocorrelation, Rodrigo Tapia-Mcclung
Detecting Hot Spots Of Mountain Pine Beetle Infestations In The Forests Of British Columbia: An Approach Using Local Spatial Autocorrelation, Rodrigo Tapia-Mcclung
Theses and Dissertations (Comprehensive)
Mountain pine beetle (Dendroctonus ponderosae Hopkins) is an endemic species in the forests of British Columbia that has become epidemic and reached infestation levels like never before. Different approaches have been taken in order to try and manage the forest and understand the processes affecting the behavior of mountain pine beetle. No single model has been entirely successful in unearthing the complexity of mountain pine beetle behavior. In this thesis, large spatial data sets of mountain pine beetle attacks, obtained from helicopter and ground surveys, and further adjusted for the incorporation of uncertainty, are studied using a spatial autocorrelation approach …
Seasonal Variability Of Carbon Dioxide Fluxes Over A Heterogeneous Low Tundra Ecosystem, Ronald P. Van Haarlem
Seasonal Variability Of Carbon Dioxide Fluxes Over A Heterogeneous Low Tundra Ecosystem, Ronald P. Van Haarlem
Theses and Dissertations (Comprehensive)
The seasonal carbon dioxide (CO2) budget and its associated environmental controlling parameters, soil moisture, soil temperature and depth to frost were investigated throughout the growing period during the summer of 2004. The study site is located within the low arctic tundra environment at Daring Lake, NWT (62⁰52’N, 111⁰35’W). The CO2 fluxes from an area of heterogeneous tundra composition were intensely monitored. The net seasonal CO2 budget was approximated to be 10.2 g C-CO2 m-2 for 100 days (DOY 159-259) of the 2004 snow-free study period. The CO2 flux dynamic was found to differ between 4 identified seasonal periods—melt, pre-green, green …