62 



Table 6. Pearson product-moment correlation coefficients for 



clusters based on percentage data for diatom taxonomic 

 groups with macrophyte and water quality variables. 

 * = p < 0.05. 







correlation coefficient 











prob. > 1 r 1 under Ho: rho 



= 









sample 



size 









CLUSl 



CLUS2 



CLUS3 



CLUS4 



CLUS5 





*-0.691 



0.163 



*0.547 



-0.173 



*0.528 



TSI(AVG) 



<0.001 



0.397 



0.002 



0.368 



0.003 





29 



29 



29 



29 



29 





*-0.692 



*0.322 



*0.409 



-0.356 



*0.389 



pH 



<0.001 



0.009 



0.0276 



0.058 



0.037 





29 



29 



29 



29 



29 



Specific 



*-0.531 



0.212 



0.218 



-0.253 



0.154 



conduc- 



0.003 



0.269 



0.257 



0.185 



0.426 



tance 



29 



29 



29 



29 



29 



Percent- 



0.145 



-0.084 



-0.358 



0.193 



-0.271 



area 



0.519 



0.710 



0.102 



0.388 



0.215 



coverage 



22 



22 



22 



22 



22 



Percent- 



-0.124 



-0.083 



-0.194 



-0.165 



-0.120 



volume 



0.521 



0.671 



0.313 



0.392 



0.536 



infestation 



29 



29 



29 



29 



29 



Floating- 



-0.149 



-0.116 



-0.092 



-0.019 



0.408 



leaved 



0.508 



0.607 



0.685 



0.934 



0.060 



biomass 



22 



22 



22 



22 



22 



Submerged 



-0.024 



0.121 



-0.279 



-0.113 



-0.106 



biomass 



0.916 



0.591 



0.209 



0.617 



0.640 





22 



22 



22 



22 



22 



Emergent 



-0.045 



-0.096 



-0.233 



0.404 



0.040 



biomass 



0.843 



0.670 



0.297 



0.062 



0.859 





22 



22 



22 



22 



22 



