Lewis, Kathy - University of Northern British Columbia

研究领域

My research interests are primarily in the fields of forest pathology and disturbance ecology. I study how disease-causing organisms interact with their physical and biological environments in forest ecosystems, and how forest management practices and climate change can affect those interactions. I have two main areas of research: 1) stand dynamics (stand age and size structure, species composition, recruitment and mortality rates) resulting from biotic disturbance agents; 2) epidemiology and population genetics of forest pathogens and resultant impacts of forest management practices. Current projects include the following: Changes in distribution of western spruce budworm and the relationship with climate change Reconstruction of fire regimes in the wintering ground of the Bathurst caribou herd and relationships with climate change and lichen abundance. Sensitivity of western red cedar to climate variables, and interaction of climate with outbreaks of western hemlock looper. Predicting decay and degrade rates in standing trees killed by mountain pine beetle, and tree fall rate in beetle-killed trees. Examination of the distribution and severity of past outbreaks of Dothistroma septosporum in northwestern B.C. and relationships with past climate. Evolutionary and genetic basis for variation in secondary metabolite production in lodgepole pine in defense agains Dothistroma septosporum. Site and climate factors that influence epidemiology and disease severity of red band needle blight, caused by Dothistroma septosporum. Genotypic and phenotypic diversity of Geocaulon lividum and the influence on severity of disease caused by Cronartium comandra.

近期论文

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Boateng, K. and Lewis, K.J. 2015. Spore dispersal by Dothistroma septosporum in northwest British Columbia. Phytopathology. 105:69-79. Welsh, C., Lewis, K., Woods, A. 2014. Regional outbreak dynamics of Dothistroma Needle Blight Linked to weather patterns in British Columbia, Canada. Canadian Journal of Forest Research. 44:212-219 Hrinkevich, K. and Lewis, K.J. 2011. Northern Range Limit Mountain Pine Beetle Outbreak Dynamics in Mixed Sub-boreal Pine Forests of British Columbia. Ecosphere. 2:Article 116. Wallis, CM. Huber, D.P.W., and Lewis, K. J. 2011. Ecosystem, location, and climate effects on foliar secondary metabolites of lodgepole pine populations from central British Columbia. J. of Chemical Ecology 37:607-621. Lewis, K. and Thompson, R.D. 2011. Wood degradation in standing lodgepole pine killed by mountain pine beetle. Wood and Fiber Science. 43:1-13. Sturrock, R., Frankel, S., Brown, A., Hennon, P., Kliejunas, J., Lewis, K., Worrall, J. and Woods, A. 2011. Climate change and forest diseases. Plant Pathology. 60: 133-149. Dale, A., Lewis, K. and Murray, B. 2011. Sexual reproduction and gene flow in the pine pathogen Dothistroma septosporum in British Columbia. Phytopathology. 101: 68-76. Wallis, C., Reich, R., Lewis, K. and Huber, D. 2010. Lodgepole pine provenances differ in chemical defense capacities against foliage and stem diseases. Can. J. For. Res. 40: 2333-2344. Welsh, C., Lewis, K.J. and Woods, A. 2010. The outbreak history of Dothistroma needle blight; an emerging forest disease in northwest British Columbia, Canada. Canadian Journal of Forest Research. In Press. Lewis, K. 2014. Cumulative Environmental, Community and Health Effects of Multiple Natural Resource Developments in Northern BC. Why I wish I had studied more Economics in University. Jan. 10, 2014. Prince George. Lewis, K. and Woods, A. 2013. Dothistroma Needle Blight: An emerging disease and a harbinger of more to come. Swedish University of Agricultural Sciences, Uppsala. May 26, 2013. Lewis, K. 2013. Healthy Forests, Healthy Communities, Results from UNBC workshops. March 27, 2013 Lewis, K. 2013. Green and Growing? The Human Forest Resource. Forest Products Association, Prince George, April 29, 2013. Lewis, K. 2012. Forestry Students and the “F” Word – societal barriers to forestry recruitment. Bridging the Divide: A Multi-Sector Approach to Natural Resource Labour Needs in Northern BC. Resources North Association. Prince George. April 24 and 25, 2012 Lewis, K., Johnson, C. and Karim, Md.N. 2012. Fire, lichens and Bathurst caribou. Fire Management Division, Environment and Natural Resources, Northwest Territories. April 17,18, 2012. Yellowknife, NWT.Lewis, K., Johnson, C. and Karim, Md.N. 2012. Fire, lichens and Bathurst caribou. Fire Management Division, Environment and Natural Resources, Northwest Territories. April 17,18, 2012. Yellowknife, NWT. Lewis, K. 2011. Red band needle blight – canary in the coal mine. BC Environmental Articulation Committee meeting. May 17, 2011.