Source of Variation SS df MS F P-value F crit Rows 9.536562 23 0.414633 11.88923 5.83E-16 1.686897 Columns 0.006146 3 0.002049 0.058742 5.83E-16 2.737492 Error 2.406354 69 0.034875       Total 11.94906 95

Table 3: Two-way ANOVA for differences in pH between seasons and stations along Muthupettai coastal waters during the study period (January-2010 to December-2011).