Table 2: One way ANOVA analysis and tukey comparisons: between sites, between months, between years, between site vs year, between site vs month vs year.

F-value

 

 

 

 

 

Compound

SITE

MONTH

YEAR

SITEX

YEAR

 

SITEXMONTHXYEAR

 

 

 

 

 

 

H2O2

7.33**

6.75**

2.84

6.97***

15.43***

 

(a b b)

( b a a)

( a a)

( a b b )

(a b c )

SOD

3.53*

3.26*

7.87*

3.34*

8.37***

 

(a a b)

(a b a)

(b a)

(a a b)

(a b c)

CAT

11.8***

4.78**

0.0033

4.57**

38.33***

 

(a a b)

(a b b)

(a a)

(a a b)

(a b c)

APX

0.68

7.48**

19.64***

4.3**

49.27***

 

(a a a)

(b b a)

(b a)

(a a b)

(a b c)

GR

5.49**

3.48*

0.17

2.42*

29.87***

 

(a b b)

(a b b)

(a a)

(a a b)

(b b a)

GPX

1.26

0.82

0.03

0.94

1.03

 

(a a a)

(a a a)

(a a)

(a a a)

(a a a)

a*, ** and *** indicate significance at p < 0.05 with weak, moderate and highly significance
bLetters between parentheses show the differences among SITES, in the order P1, P2 and CTRL. Different letters denote a statistical difference with 95% confidence level (TUKEY test), with “a” being the highest concentration.