Skip to Main Content

TF was collected during 16 rainfall events with cylindrical polyethylene gauges similar to the standard rain gauges (diameter = 20 cm). The gauges were arranged under the canopy of each shrub in four directions (0, 90, 180 and 270 °). Corresponding to the differences in canopy area among species (Table 1), a varying number of gauges were installed from shrub base to crown periphery at each direction for each species. Four gauges were used in each of the four directions for C. microphylla and S. gordejevii, and three gauges for each direction were used for H. fruticosum. Thus, 16 TF collectors were used for each C. microphylla and S. gordejevii shrub and 12 for each H. fruticosum shrub. TF was measured immediately after the rainfall ended or in the morning the next day in case the rainfall event occurred overnight. TF was calculated as the following: , where TF is throughfall amount (mm), TV is throughfall volume (L) for each gauge, n is the number of throughfall gauges under each shrub canopy, and GA is the gauge projection area (m2).

Table 1

Characteristics of the canopy morphology for C. microphylla, H. fruticosum and S. gordejevii in the study area

Average value
VariablesC. microphyllaH. fruticosumS. gordejevii
Canopy area (m24.01 ( ± 1.67) 2.66 ( ± 1.27) 4.15 ( ± 1.97) 
Number of branches 31 ( ± 7)ab 19 ( ± 8)b 36 ( ± 20)a 
Stem basal diameter (cm) 1.39 ( ± 0.28)a 0.89 ( ± 0.13)b 0.93 ( ± 0.09)b 
Branch angle (°) 52.8 ( ± 9.8) 58.2 ( ± 11.5) 56.3 ( ± 13.6) 
Stem basal area (cm241.94 ( ± 15.61)a 10.35 ( ± 6.11)b 21.34 ( ± 12.35)b 
Shrub height (m) 1.56 ( ± 0.37)ab 1.39 ( ± 0.15)b 1.62 ( ± 0.24)a 
Canopy volume (m32.39 ( ± 1.47) 1.42 ( ± 0.84) 2.04 ( ± 1.06) 
Average value
VariablesC. microphyllaH. fruticosumS. gordejevii
Canopy area (m24.01 ( ± 1.67) 2.66 ( ± 1.27) 4.15 ( ± 1.97) 
Number of branches 31 ( ± 7)ab 19 ( ± 8)b 36 ( ± 20)a 
Stem basal diameter (cm) 1.39 ( ± 0.28)a 0.89 ( ± 0.13)b 0.93 ( ± 0.09)b 
Branch angle (°) 52.8 ( ± 9.8) 58.2 ( ± 11.5) 56.3 ( ± 13.6) 
Stem basal area (cm241.94 ( ± 15.61)a 10.35 ( ± 6.11)b 21.34 ( ± 12.35)b 
Shrub height (m) 1.56 ( ± 0.37)ab 1.39 ( ± 0.15)b 1.62 ( ± 0.24)a 
Canopy volume (m32.39 ( ± 1.47) 1.42 ( ± 0.84) 2.04 ( ± 1.06) 

Mean ± standard deviation are reported.

Different letters in rows indicate significant differences among three shrub species at P ≤ 0.05.

Close Modal

or Create an Account

Close Modal
Close Modal