other sites. Species diversity was greatest at Parcel B followed by C07984 and Sink
Branch. Species evenness was greatest at SP11.


Subcanopy Tree Species

 Table 7.5 summarizes subcanopy tree species found at each research site. Species
found in all sites were classified as facultative, facultative wet or obligate except for Rhus
copallinum, which is designated as an upland species.

 Density of early successional subcanopy species was highest at SP6 (15 years)
followed by C07984. Densities of less than 1500 trees ha" occurred at sites throughout
the age range. Fewer than one half of the sites sampled had late successional subcanopy
species present. The highest density of late successional subcanopy species was found at
Parcel B (19 years) and Sink Branch (18 years), the two oldest sites. Sites between 5 and
17 years old were lacking a late successional subcanopy component with two exceptions,
HP5 Phase 3 and Cateye, where several subcanopy species were planted during
construction.

 Subcanopy tree species richness was highest at Parcel B, with 4 species, and
lowest at East Lobe and C07984, with one species. Salix caroliniana was present at ten
of fourteen sites. Myrica spp. was present at nine of fourteen sites. Less than one half of
the sites had species other than Myrica spp. and Salix caroliniana present. Celtis
laevigata, Ilex cassine and Cornus foemina were the only late successional subcanopy
species occurring. Sapium seribiferum (Chinese Talo) was present at one site but is
considered an invasive exotic. Rhus copallinum was also present at one site; it is not
considered a wetland species.

 Species diversity was greatest at Parcel B (0.42) and Sink Branch (0.39).
Diversity of all other sites ranged from 0.0 to 0.30. East Lobe and CO7984, each with
only one subcanopy species, had a species diversity of 0. Species evenness was
undefined at SP1 East Lobe and C07984; this in artifact of the occurrence of only one
species. Sites with more than one subcanopy species present had evenness values
ranging from 0.32 0.98.

 Mean DBH of all subcanopy species (Table 7.5) ranged from 0.60-7.7 cm and
was greatest at SP1 East Lobe. Early successional species DBH ranged from 0.5-7.7 cm,
while DBH of late successional species ranged from 0.7-8.6 cm. Only in sites where late
successional species were planted was the DBH of late successional species greater than
early successional species.


Shrub Species

 Shrub stem density ranged from 0 to greater than 20000 stems acre-' (Table 7.6).
This count includes all stems originating from an individual shrub, but does not reflect


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