<p>Functional traits for six native tallgrass prairie species were analyzed to determine if there was an effect of <em>A. gerardii</em> ecotype on both within- and between-species functional trait variability. We found that within-species functional trait variation was highest among species in plots planted with non-locally adapted ecotypes of <em>A. gerardii</em> and higher among subordinate rather than dominant species across ecotype plots. </p