A review of the biology of the weedy Siberian peashrub, Caragana arborescens, with an...

The introduction and establishment of non-native species has been recognized as one of the most significant threats to the maintenance of native biodiversity in most taxa, including angiosperms. The Siberian peashrub, Caragana arborescens Lam. (Fabaceae), is native to Eurasia, but was introduced to North America in the mid-1700s. In the past 250 years, the species has become established in almost all of Canada, and approximately half of the states in the USA. However, the literature on its potential effects on native eco-systems is relatively sparse and scattered. To complement the Caragana Control Trials Project initiated by the City of Calgary (Alberta, Canada) in 2009, we review the biology, ethnobotany, ecosystem effects, and candidate control methods of C. arborescens. Perhaps unsurprisingly, we find evidence for both positive and negative effects and uses of C. arborescens. We caution that continued habitat degradation and climate change may facilitate C. arborescens becoming an invasive or noxious species in more areas with time. Finally, we advocate that more attention be paid to C. arborescens throughout its range, with special focus on habitat fragments, recently deforested areas, and wetlands impacted by human activities.

Английский

Botanical Studies. – 2012. – Vol. 53, № 1. – P. 1–8.