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All issues Volume 67 / No 7 (October-November 2010) Ann. For. Sci., 67 7 (2010) 701 Full HTML
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Table II

Statistical significance of environmental variables used in Redundancy Analyses: series of best fitting variables according to stepwise manual forward selection with increasing sums of explained total variances, and explained variances of the environmental variables if used singly. F- and p-values resulted from Monte-Carlo permutation (n = 499).

Manual forward selection Single variables
% var. F-value p-value % var. F-value p-value
All
*Altitude 0.232 92.80 0.002 0.230 92.80 0.002
*Northness 0.288 24.48 0.002 0.022 7.00 0.002
*Calcareous 0.326 16.89 0.002 0.107 37.05 0.002
*Eastness 0.336 4.73 0.004 0.011 3.50 0.038
*Combination 0.342 2.87 0.024 0.007 2.26 0.064
*Slope 0.348 2.87 0.022 0.015 4.05 0.014
Litter 0.352 1.51 0.188 0.005 1.60 0.182
Grazing 0.352 0.24 0.966 0.002 0.51 0.666
< 1200 m a.s.l.
*Calcareous 0.071 9.23 0.004 0.071 9.32 0.004
*Altitude 0.137 9.13 0.002 0.065 8.44 0.004
*Northness 0.190 7.89 0.002 0.035 4.44 0.008
*Eastness 0.224 5.08 0.002 0.017 2.15 0.092
*Combination 0.243 2.98 0.028 0.009 1.15 0.268
*Slope 0.261 2.80 0.026 0.005 0.91 0.412
Grazing 0.267 0.86 0.444 0.010 1.16 0.256
Litter 0.271 0.64 0.608 0.007 0.63 0.596
> 1200 m a.s.l.
*Altitude 0.176 39.56 0.002 0.176 39.56 0.002
*Northness 0.262 21.30 0.002 0.066 13.08 0.002
*Calcareous 0.293 8.18 0.002 0.075 15.0 0.002
*Slope 0.304 2.73 0.024 0.014 2.65 0.034
Eastness 0.310 1.61 0.140 0.006 1.17 0.266
Combination 0.315 1.40 0.226 0.009 1.74 0.146
Litter 0.323 2.13 0.068 0.008 1.40 0.212
Grazing 0.330 0.51 0.75 0.006 1.07 0.350