Table 7. Equilibrium growth rate (lambda) for Arabis fecunda 

 populations in Centaurea maculosa removal (treatment) and control 

 plots at Birch Creek (1987-1990) and Charley's Gulch (1987-89). 

 Values of lambda are best estimates from bootstrap resampling 

 with a sample size of 1000 (see Methods) . 



Birch Creek 1987-1989 



Control: lambda=0.811 Treatment: lambda=1 .161 



t=3.395, p<0.001 



Birch Creek 1987-1990 



Control: lambda=0.977 Treatment: lambda=1 .070 



t=1.348, p=0.889 



t=4.210, p <0.001 



