Scatterplot of site-scores on the first and second principal components.

<p>These two axes represent 73.4% of the total variation in the correlation matrix. Independent variables listed on each axis indicate variables with significant eigenvector loadings. Abbreviations for variables are listed in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0010835#pone-0010835-t002" target="_blank">Table 2</a>. Mean <i>S. planifrons</i> densities are given for each site (<i>n</i> = 6 transects per site).