69 



Table 7. Correlation coefficients for principle components based on 

 diatom percentage data with water quality and 

 macrophyte variables. * = p < 0.05. 





correlation coefficient 









prob. > 1 



r 1 under Ho: rho 

 sample size 



= 







1st. 



2nd. 



3rd. 



1st. 





principle 



principle 



principh 



; principle 





comp. 



comp. 



comp. 



comp. 

 TSI(AVG) and 

 pH partialled out 



Percent 



-0.556 



0.130 



*0.395 



-0.134 



volume 



0.774 



0.500 



0.034 



0.653 



infestation 



29 



29 



29 



29 



Percent 



-0.322 



0.132 



0.298 



-0.171 



area 



0.144 



0.557 



0.176 



0.444 



coverage 



22 



22 



22 



22 



Floating- 



0.102 



0.064 



-0.146 



0.086 



leaved 



0.649 



0.776 



0.515 



0.703 



biomass 



22 



22 



22 



22 



Submerged 



-0.108 



-0.163 



0.168 



-0.185 



biomass 



0.632 



0.467 



0.453 



0.409 





22 



22 



22 



22 



Emergent 



-0.144 



0.114 



0.082 



-0.081 



biomass 



0.521 



0.612 



0.714 



0.720 





22 



22 



22 



22 





*0.753 



-0.023 



0.029 



*0.414 



TSI(AVG) 



<0.001 



0.901 



0.880 



0.026 





29 



29 



29 



29 



