FIG. 3.

Three-dimensional nonmetric MDS plot for ARISA profiles collected from study lakes. Stress = 0.09. The symbols are coded to represent the lakes from which profiles were obtained. Lake abbreviations are listed in Table 1. The arrows indicate the directions in which scores on the various axes increase, and Pearson product-moment correlation coefficients of the axes with various environmental variables are provided in the insert. A, axes 1 and 2; B, axes 1 and 3; C, axes 2 and 3. temp, temperature; chl a, chlorophyll a; DN, dissolved nitrogen; DO, dissolved oxygen; epi, epilimnion.