Jaime Madrigal, Douglas A. Kelt, Peter L. Meserve, Julio R. Gutierrez and Francisco A. Squeo. 2011. Bottom-up control of consumers leads to top-down indirect facilitation of invasive annual herbs in semiarid Chile.
Appendix B. Ordination plots from indirect and direct gradient analyses.
|FIG B1. Samples (dots) and environmental variables (vectors) in PCA and RDA ordination plots. Vectors of Degus and Ppt variables in PCA ordination represent just correlation with first and second axes.|
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