Table 2

Explanatory variables selected in stepwise Canonical Correspondence Analysis models

Class Code Definition
Ownership PUB Ownership (public or private)
Topography (30-m DEM) ELEV Elevation (m)
SLPOS Slope position from 0 (bottom) to 100 (ridgetop)
SLOPE Slope (percent)
SOLAR Solar radiation (cal/cm2) from program SOLARRAD
Geology VOLC Igneous: volcanic and intrusive rock
MAFO Igneous: mafic rocks--miocene and older
SEDR Sedimentary
Climate (PRISM model) SMRPRE Mean precipitation from May-September (nat. log mm)
CVPRE Coefficient of variation of December and July precipitation
SMRTP Growing-season moisture stress (SMRTMP/SMRPRE)
ANNTMP Mean annual temperature (C)
DIFTMP August max. temperature - December min. temperature (C)
STRATUS Marine stratus ceiling <1524 m and visibility <8 km (percent)
Landsat TM B1 Band 1 (blue)
B4 Band 4 (near-infrared)
B7 Band 7 (mid-infrared)
WET Axis 3 (wetness) from tasseled cap transformation
R43 Ratio of B4 (near-infrared) to B3 (red)
DISTURB Disturbance (yr) from multitemporal Landsat TM (Cohen et al.)
Location X Longitude (decimal degrees)
Y Latitude (decimal degrees)

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