PCA bi-plot of <i>Leymus chinensis</i> (Trin.) Tzvelev functional traits for hydroponic treatment based on the variance in 10 functional traits explained by the first (PCA 1), second (PCA 2), and third (PCA 3) principal axes.

<p>(a1) and (b1): PCA ordination of <i>Leymus chinensis</i> (Trin.) Tzvelev plants from the ungrazed or unclipped (solid circle) and grazed or clipped (empty circle) treatments in hydroponic conditions, respectively. (a2) and (b2): Box plots illustrate the score distribution of <i>Leymus chinensis</i> (Trin.) Tzvelev functional traits from different communities along the three principal axes. Abbreviations are as described in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141055#pone.0141055.g001" target="_blank">Fig 1</a>.