Giant cane (Arundinaria gigantea) was once one of the most abundant plants in wetlands
and riparian areas throughout the Southeastern U.S.
However, giant cane stands (canebrakes) have become increasingly rare and there
is much interest in utilizing giant cane to improve stream restoration efforts.
The primary objective of this research is to evaluate the use of giant cane for
stream restoration, especially in areas that contain monotypic stands of exotic
invasive plants. Giant cane's ability to rapidly expand via clonal
growth indicates that it might be able to compete with the many dominant
exotics that hinder restoration efforts in the region. Clumps of giant cane
were transplanted into areas both dominated by and recently cleared of Chinese
privet (Ligustrum sinense), a
widespread invasive exotic shrub. A randomized split-plot experimental design
was established with nine replicates of two factors (privet, cane planting)
each at two levels (privet & privet removal, cane & no cane,
respectively). We measured cane survival and growth (clump area, new culms, culm height, and culm diameter),
privet recruitment (number and height of privet seedlings), light availability,
and percent cover of all species. Cane survival was high (93%). Privet removal
resulted in an increase in light availability, number of new cane culms,
diameter of new cane culms, and growth of privet seedlings. However, there was
no privet removal effect upon cane height (mean: 61.1±1.7 cm) or number of
privet seedlings (mean: 22.7±6.2 seedlings/m2). During this first
growing season, giant cane establishment was very good; these results
demonstrate great potential for restoring canebrakes and utilizing giant cane to
improve riparian restoration efforts in the Southeastern U.S.