Table 2 The mean and standard deviation of all confounding factors, the treatment log TN, and the response invertebrate richness within all streams and within the three strata

2.33 ± 0.51

2.04 ± 0.35

2.95 ± 0.36

2.64 ± 0.38

48.30 ± 15.15

55.19 ± 12.58

33.72 ± 11.76

40.03 ± 11.49

1252.06 ± 722.10

1455.84 ± 688.03

783.80 ± 379.71

1701.97 ± 501.16

− 114.04 ± 7.55

− 166.85 ± 5.48

− 102.06 ± 3.16

− 113.58 ± 4.06

− 0.31 ± 0.56

− 0.07 ± 0.49

− 0.81 ± 0.18

− 0.74 ± 0.27

4.07 ± 2.34

3.09 ± 1.68

6.77 ± 1.73

4.53 ± 2.56

4.35 ± 1.85

3.05 ± 1.20

6.04 ± 1.21

5.28 ± 1.73

7.34 ± 1.12

6.76 ± 1.06

8.44 ± 0.55

7.75 ± 0.77

5.48 ± 2.42

3.97 ± 1.52

8.70 ± 1.61

6.42 ± 1.90

35.45 ± 30.35

1.82 ± 8.95

12.79 ± 32.54

4.85 ± 20.45

15.16 ± 5.55

12.39 ± 4.19

20.58 ± 5.02

16.08 ± 5.70

8.10 ± 21.28

0.58 ± 5.59

38.72 ± 33.44

2.90 ± 9.58

0.17 ± 0.47

0.06 ± 0.22

0.33 ± 0.44

0.13 ± 0.47

0.37 ± 0.38

0.23 ± 0.31

0.72 ± 0.32

0.59 ± 0.39

0.56 ± 0.64

0.36 ± 0.57

1.10 ± 0.53

1.03 ± 0.56