y = 0.026x 0.0549
 r = 0.42
 p < 0.01


 1.2

 1.0

 0.8

S0.6

> 0.4

 0.2

 0.0


 0.6

8 0.5

8 0.4

|0.3

U 0.2

 0.1

 0.0



 0.8


0.7 0 Early Successional Species


*Late Successional Species


0 5 10 15 20


(c) o



 y =--0.0041x2 + 0.084x 0.0644
 r = 0.41


0 5 10 15 20


OEarly Successional Species
*Late Successional Species


0 0


Age (years)


Figure 7.21.


Frequency of Occurrence of (a) Canopy Tree Seedlings, (b) Vines,
(c) Subcanopy Species, and (d) Shrub Species in the Understory of
Constructed Forested Wetlands.


7-79


0 5 10 15 20


. 0.6

 0.5

I 0.4

o 0.3
 0.2


 1.2-

 1.0 -

S0.8 -

S0.6

 0.4-

 0.2-