Variables r2 p-value Sand % -0.29037 0.020967 Clay % 0.083914 0.513201 Silt % 0.280582 0.02592 Organic matter -0.35712 0.004064 Salinity 0.253341 0.045137 pH -0.18406 0.148717 Phragmites spp. -0.11622 0.364349 Distance -0.52832 8.57E-06 Transect 0.131607 0.303875 Elevation -0.65074 7.77E-09

Table 1: Correlation coefficients and p-values of cluster order from unconstrained cluster analysis based upon untransformed unweighted Euclidean distance and the measured environmental variables for Oglet Bay. R2 values >0.5 and P-values <0.05 are in bold.