Ragan M. Callaway

TL;DR: Stem densities of Solidago gigantea are correlated with significant decreases in total species diversity and native species diversity in Europe, but not in North America, which indicates that the biogeographic origin of species can affect community organization and that communities with a common evolutionary history might function differently than those that do not share such a history.

TL;DR: Comparisons of the effects of Centaurea stoebe and the root exudate (±)-catechin, on ammonification and nitrification in both the non-native and native ranges of this species suggest biogeographic differences in the way a plant species alters nitrogen cycling through the direct effects of root exudes.

TL;DR: Field surveys and experiments indicate that the biogeographic origin of species can have important effects on plant interactions and community organization, and Solidago strongly suppressed both European and North American species in competition experiments.

TL;DR: The results suggest that dominant plant functional groups in both California and Argentina offer substantial resistance to C. solstitialis invasion, and the success of this species might be tightly linked to a remarkable ability to take advantage of disturbance in both regions.