Research Article
Geographic Patterns and Stand Variables Influencing Growth and Vigor of Populus tremuloides in the Sierra Nevada (USA)
Table 3
Generalized linear mixed model of aspen stem basal area increment (BAI; cm2 year−1) for aspen trees in 20 stands around Lake Tahoe Basin. −2 Log Likelihood = 299.6. Dependent variable = . Categorical variable for location: North/east, south/west. Elevation in km. : Estimate for standardized coefficients of fixed effects.
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aCrown ratio (arcsine transformed) = Sin−1(CR0.5). bPercent conifer BA (arcsine transformed) = Sin−1((0.01 * percent conifer BA)0.5) where percent composition in terms of vicinity BA included BA of the sample aspen and all neighbor trees. |