Table 1

The loss of individuals (excluding the focal invader) and Kendall’s rank correlation explaining shifts in species’ abundances for all sites. Kendall’s rank correlations show the relationship between a species’ abundance in the uninvaded community and its deviation from its expected abundance in the invaded community. Significant P values reflect larger negative effects of plant invaders on common as compared with rare species.

SiteSampled
site
Individuals in
uninvaded
community
Individuals in
invaded
community
Kendall’s rank
correlation
coefficient (τ)
Kendall’s rank
correlation
P value
Hawai’i122377–0.2310.109
216317–0.4050.014
324159–0.3690.010
Missouri14378374–0.381<0.001
21460228–0.378<0.001
384098–0.442<0.001
44348486–0.407<0.001
Florida1*569*120*–0.482*<0.001*
2362127–0.2300.072
3369129–0.3080.040

*Corresponds to the Highlands Hammock State Park example shown in Fig. 1A.