Fritz Gerhardt and Sharon K. Collinge. 2007. Abiotic constraints eclipse biotic resistance in determining invasibility along experimental vernal pool gradients. Ecological Applications 17:922–933.

Appendix D. A figure showing statistical relationships between plant neighborhood and focal species, water depth, and initial neighbor richness.

FIG. D1. Significant relationships between plant neighborhood and (A) focal species, (B–C) water depth, and (D–F) initial neighbor richness in a greenhouse experiment examining abiotic and biotic resistance to plant invasions. All relationships illustrated were statistically significant (P < 0.05; see Appendix C). Values are means (+1 SEM). In B–C, water depth increases from left to right.