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Table 6 Correlation of the explanatory variables to the ordination axes derived from species data by state (Kendall’s tau statistic, Ƭ) for wildfire sites in Montana, Idaho, and Washington, USA, that burned in July and August between 2003 and 2007. Explanatory variables are: elevation, index of burn severity (dNBR), transformed aspect (trasp), overstory canopy cover (cc), length of frost-free period (ffp), mean annual temperature (mat), mean maximum temperature of the warmest month (mmax), mean minimum temperature of the coldest month (mmin), mean annual precipitation (map), growing season precipitation (gsp), summer precipitation (smrp), spring precipitation (sprp), and winter precipitation (winp). Correlations in bold (Ƭ > 0.200) are shown as vectors in Fig. 3

From: Does burn severity affect plant community diversity and composition in mixed conifer forests of the United States Intermountain West one decade post fire?

 

Montana fires

Idaho fires

Washington fires

Variable

Axis 1

Ƭ

Axis 2

Ƭ

Axis 3

Ƭ

Axis 1

Ƭ

Axis 2

Ƭ

Axis 3

Ƭ

Axis 1

Ƭ

Axis 2

Ƭ

Axis 3

Ƭ

elevation

0.090

0.098

−0.229

0.050

0.603

0.212

0.583

−0.150

−0.117

dNBR

0.224

−0.22

−0.354

−0.018

−0.111

0.099

−0.017

0.550

−0.250

trasp

0.005

−0.202

0.041

0.222

0.117

−0.145

−0.133

0.067

−0.000

cc

−0.123

0.282

0.270

−0.250

−0.081

−0.125

0.117

−0.050

0.550

ffp

−0.097

−0.092

0.175

−0.039

−0.575

−0.270

−0.600

0.133

0.133

gsp

0.334

0.185

−0.059

−0.048

0.282

0.270

0.594

−0.142

−0.126

map

0.316

0.194

−0.079

−0.109

0.234

0.202

0.567

−0.133

−0.133

mat

−0.293

−0.151

0.171

−0.008

−0.613

−0.254

−0.600

0.133

0.133

mmax

−0.322

−0.178

0.159

0.057

−0.558

−0.259

−0.600

0.133

0.133

mmin

−0.237

−0.102

0.059

−0.089

−0.574

−0.218

−0.600

0.133

0.133

smrp

0.298

0.149

−0.042

−0.081

0.410

0.304

0.600

−0.133

−0.100

sprp

0.333

0.216

−0.140

−0.129

0.125

0.145

0.594

−0.142

−0.126

winp

0.307

0.193

−0.076

−0.107

0.377

−0.071

0.517

−0.150

−0.117