* The benthic metrics with the largest loadings for the benthic principal components (proportion of variance of benthic data explained by BENPCs is in parentheses) that were correlated with Benthic Canonical Variate 1 are: BENPC2 (0.21) = -%Dominant taxon, +Shannon Diversity, and +Taxonomic richness.
** The environmental variables with the largest loadings for the environmental principal components (proportion of variance of environmental data explained by PCs is in parentheses) that were correlated with Environmental Canonical Variate 1 are: PC1 (0.49) = +TUs for all pyrethroids, +Mercury to TEL, and +Zinc to TEL.
Figure 3: Results of the canonical correlation analysis of benthic biological versus environmental data for Arcade Creek in 2009-2011: canonical variate 1 for principal components of benthic metrics* versus the canonical variate 1 for principal components of environmental data** (pyrethroid TUs, metals to TELs, and habitat metrics). The principal components that were most highly correlated with the canonical variates are shown, along with the direction of their relationships (shown by arrows). The metrics in brackets are those that were those that were most highly loaded on these principal components. Regression trend line and 95% confidence limits are indicated by solid and dashed lines.