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The stem basal area of the shrubs significantly influenced the SF funneling ratio. The funneling ratio value decreased with stem basal area (y = 248.064 x−0.246; R2 = 0.445; p < 0.0001) (Figure 6). The volumes of SF channeled into the plots were estimated to be 3,167, 676, and 2,210 L for C. microphylla, H. fruticosum, and S. gordejevii, respectively (Table 4).
Table 4

Estimated SF funneling ratio and volume of SF generated in the study area, using the regression from Figure 5 and the volume of rainfall observed

Stem basal area (cm2)
Funneling ratio
SpeciesPg (mm)Number of branchesminmaxminmaxSF (L)
C. microphylla 246.2 31 0.80 67.17 88 262 3,167 
H. fruticosum 246.2 19 0.31 24.48 113 331 676 
S. gordejevii 246.2 36 0.51 37.77 102 293 2,210 
Stem basal area (cm2)
Funneling ratio
SpeciesPg (mm)Number of branchesminmaxminmaxSF (L)
C. microphylla 246.2 31 0.80 67.17 88 262 3,167 
H. fruticosum 246.2 19 0.31 24.48 113 331 676 
S. gordejevii 246.2 36 0.51 37.77 102 293 2,210 
Figure 6

The relationship between stem basal area and average SF funneling ratio for C. microphylla, H. fruticosum and S. gordejevii using total rainfall, SF volume and stem basal area measurements over the study period.

Figure 6

The relationship between stem basal area and average SF funneling ratio for C. microphylla, H. fruticosum and S. gordejevii using total rainfall, SF volume and stem basal area measurements over the study period.

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