Testing And Evaluation Of Newnhams Variable Form Taper Model For Trembling Aspen Populus Tremuloides Michx In Northwestern Ontario
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Author | : Keith Harvey Smith |
Publisher | : |
Total Pages | : 68 |
Release | : 2002 |
Genre | : Populus tremuloides |
ISBN | : |
Download Testing and Evaluation of Newnham's Variable-form Taper Model for Trembling Aspen (Populus Tremuloides Michx.) in Northwestern Ontario Book in PDF, Epub and Kindle
Author | : Megan Thompson |
Publisher | : |
Total Pages | : 130 |
Release | : 2014 |
Genre | : Populus tremuloides |
ISBN | : |
Download Adaptive Variation of Trembling Aspen in Northwestern Ontario Book in PDF, Epub and Kindle
"To demonstrate the pattern of adaptive variation of Populus tremuloides (Michx.) to northwestern Ontario climate conditions, a statistical analysis was completed of growth and phenology variables from 26 provenances. Growth variables included: height measured in 1999, 2000, 2003 and 2004; stem diameter measured in 1999, 2000 and 2002; leader length measured in 2000; and, leaf flushing measured in 2000. Adaptive variation was summarized by four principal component (PC) axes modeled by climate variables at seed origin that explained 41.5, 15.8, 10.0 and 6.3 percent of the growth and phenology variation among provenances. A clinal pattern of adaptive variation in leaf flushing predicted by temperature in the growing season was demonstrated by the first PC axis. The second PC axis was strongly influenced by growth data at one test site (Dog River) and showed a weak latitudinal trend related to winter temperature and precipitation at the start of the growing season. A longitudinal pattern of adaptive variation in growth and chlorophyll florescence variables predicted by July precipitation was demonstrated in PC axis 3. A latitudinal trend was shown for PC axis 4 where adaptive variation was expressed through a combination of winter temperatures and June mean temperature that predicted leader length and height potential together with October frost hardiness. The pattern of adaptive variation indicated significant genetic variation among trembling aspen provenances over a relatively small region."-- from abstract.
Author | : Dylan Parry |
Publisher | : Canadian Forest Service, Northern Forestry Centre |
Total Pages | : 24 |
Release | : 1997 |
Genre | : Technology & Engineering |
ISBN | : |
Download The Relationship Between Trembling Aspen Phenology and Larval Development of the Large Aspen Tortrix Book in PDF, Epub and Kindle
The large aspen tortrix (Choristoneura conflictana) is an occasional defoliator of trembling aspen (Populus tremuloides) in western Canada. Research suggests that there might be a narrow phenological window for successful tortrix colonization of aspen buds in the spring. This paper adapts a stochastic model to describe the temporal relationship between C. conflictana and trembling aspen phenologies. The first characterization of the phenological stages occurring during bud-break and leaf expansion of trembling aspen is provided, as determined from observations at two sites in 1994. Degree-day models based on a common threshold temperature are developed for both insect and bud and shoot development of its host. The influence of changes in the sequence of temporal events on the success or failure of tortrix populations is also discussed.
Author | : Evert, F |
Publisher | : Chalk River, Ont. : Petawawa National Forestry Institute, Canadian Forestry Service, Environment Canada |
Total Pages | : 23 |
Release | : 1983 |
Genre | : Energy crops |
ISBN | : 9780662127567 |
Download A National System of Equations for Estimating Ovendry Mass of Trembling Aspen Populus Tremuloides Michx Book in PDF, Epub and Kindle
Author | : George A. Schier |
Publisher | : |
Total Pages | : 20 |
Release | : 1980 |
Genre | : Aspen |
ISBN | : |
Download Variation among healthy and deteriorating aspen clones Book in PDF, Epub and Kindle
Author | : Robert M. Loomis |
Publisher | : |
Total Pages | : 12 |
Release | : 1978 |
Genre | : Aspen |
ISBN | : |
Download Estimating Aspen Crown Fuels in Northeastern Minnesota Book in PDF, Epub and Kindle
Author | : Eugene M. Wengert |
Publisher | : |
Total Pages | : 12 |
Release | : 1980 |
Genre | : Aspen |
ISBN | : |
Download Lumber Yield Potential of Aspen in the Rocky Mountains Book in PDF, Epub and Kindle
Author | : Richard A. Jaynes |
Publisher | : |
Total Pages | : 24 |
Release | : 1978 |
Genre | : Aspen |
ISBN | : |
Download A Hydrologic Model of Aspen-conifer Succession in the Western United States Book in PDF, Epub and Kindle
Author | : Carleton B. Edminster |
Publisher | : |
Total Pages | : 20 |
Release | : 1982 |
Genre | : Aspen |
ISBN | : |
Download Volume Tables and Point-sampling Factors for Aspen in Colorado Book in PDF, Epub and Kindle
Author | : Bryce E. Schlaegel |
Publisher | : |
Total Pages | : 20 |
Release | : 1975 |
Genre | : Aspen |
ISBN | : |
Download Estimating aspen volume and weight for individual trees, diameter classes, or entire stands Book in PDF, Epub and Kindle