The invasive shrub European buckthorn (Rhamnus cathartica
, L.) alters soil properties in Midwestern US woodlands.
Invasive European buckthorn (Rhamnus cathartica
L.) association with mammalian species distribution in natural areas of the Chicagoland region.
Targeted DSS, DWF Ligustrum obtasifolium Watch List DWF Ligustrum vulgare Well-Established DWF Lonicera X bella Watch List DWF Rhamnus cathartica
Targeted DWF Rosa canina Watch List DWF Rosa multiflora Targeted DSS, DWF Viburnum opulus var.
L., Cornus racemosa Lam., Lonicera X bella Zabel., and Viburnum lentago L., in descending rank order, were the dominant species comprising 93% of total stems.
Shrub species were represented by wild hydrangea (Hydrangea arborescens), common buckthorn (Rhamnus cathartica
), bladdernut (Staphylea trifolia), gooseberry (Ribes sp.), common elder (Sambucus canadensis), spicebush (Lindera benzoin), multiflora rose (Rosa multiflora), and bush honeysuckle (Lonicera maackii).
For example, Schmidt and Whelan (1999) reported that American Robin (Turdus migratorius) nests had higher predation in alien shrubs (Lonicera maachii and Rhamnus cathartica
) than in comparable native shrubs and Heckscher (2004) demonstrated alien plants provided the additive foliage density necessary to stimulate Veery (Catharusfuscescens) nest placement.
(2008) examined removal of three invasive species (Lonicera morrowii, Rhamnus cathartica
, and Rosa multiflora) and two native shrubs (Cornus amomum and Rubus idaeus), finding that natives were preferentially consumed by rodents in autumn.
Perhaps equally important is study of invasive exotic species, some of which (for example, Rhamnus cathartica
and Lonicera maackii) have irrevocably altered native plant associations.
petiolata and two other non-native plants (Rhamnus cathartica
and Lonicera x bella) based on analyses of vegetation change in more than ninety Wisconsin forest stands.
(2004) found that soil N, C, and pH were significantly higher under the invasive shrub Rhamnus cathartica
than in control areas.
Forest restorations were mesic upland forests that included mostly oak (Quercus spp.), black raspberry (Rubus occidentialis L.), European buckthorn (Rhamnus cathartica
L.), honeysuckle (Lonicera spp.), and sugar maple (Acer saccharum Marsh.).
The non-native shrubs European buckthorn (Rhamnus cathartica
) and Japanese barberry (Berberis thunbergii) have been associated with high populations of non-native earthworms in woodlands (Kourtev et al., 1998; Heneghan et al., 2007), which can alter nutrient storage and availability, affecting soil food webs and understory plant communities (Gundale, 2002; Bohlen et al., 2004).