I don't want to work on the 505 project , so I do this instead

Variation in resource acquisition and utilization traits between native and invasive perennial forbs
American Journal of Botany
R. E. Drenovsky and C. E. Martin and M. R. Falasco and J. J. James
2008

"Much of this inconsistency may be related to the manner in which species are categorized into functional groups. Recent evidence suggests that categorizing species based on coarse differences in morphology or taxonomy may not adequately predict species effects on ecosystems processes. In support, our study suggests large trait variation may limit the ability to use conventional functional groupings to predict invasion resistance."

Compares root foraging efficiency between four native perennial forbs to four non-native perennial forbs. Funnily enough, one of the natives used is a common invasive elsewhere, and it performed more like a non-native. Also perhaps some problems caused by the difference between non-native non-invasive and non-native invasive?