Table 1: Comparison of the nutrient levels among stations (Dunn’s multiple comparison).

SitesDunn’s multiple comparison test results
Nitrite (NO2)Nitrate (NO3)Phosphate (PO4)

OR I versus OR IINs***Ns
OR I versus OR III*******
OR I versus MJ I******Ns
OR I versus MJ II******Ns
OR II versus OR III******Ns
OR II versus MJ I********
OR II versus MJ II********
OR III versus MJ I*********
OR III versus MJ II*********
MJ I versus MJ IINsNsNs

Ns: not significant; ; *significant; ; **very significant; ***extremely significant.