Appendix C. A figure showing principle components analysis ordination comparing habitat variables in trout ponds to fishless ponds before the experimental manipulation of trout density.
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| FIG. C1. PCA ordination plot of 11 habitat variables measured in 1998 before the trout density manipulation. PCA axis 1 was defined primarily by temperature variables, PCA axis 2 by area variables, and axis 3 by depth variables. Lines envelop fishless (dashed) and ponds with trout (solid). The ponds overlapped in ordination space, suggesting pond types did not differ in the measured physical habitat parameters. |