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Table 3 Statistical analysis of water physicochemical properties under different land use classes (2016-18)

From: Core and conditionally rare taxa as indicators of agricultural drainage ditch and stream health and function

Parametersa

Agri_ditchesb

Agri_253c

Forest

Mixed

P valued

N

Mean

Min

Max

N

Mean

Min

Max

N

Mean

Min

Max

N

Mean

Min

Max

TEMP_C

122

14.75

2.57

26.06

27

15.31

3.48

22.71

40

13.74

2.82

21.47

126

16.98

2.94

27.06

0.161

PH

122

7.74

7

8.43

27

7.64

6.53

8.65

40

8.03

7

9.19

126

7.92

7.12

8.5

0.099.

CONDUCTIVITY_MSC

122

0.82

0.004

1.981

27

0.76

0.357

2.511

40

0.19

0.035

1.246

126

0.62

0.232

1.72

0.007**d

DISS_OXYGEN_MGL

122

8.39

0.99

20.24

27

8.28

3.57

16.56

40

9.71

4.01

17.35

126

9.28

3.36

19.22

0.453

ORP_MV

122

249.60

−115.7

381.5

27

263.12

125.2

373.3

40

246.79

95

362

126

252.43

85.7

369.2

0.831

TURBIDITY_NTU

122

49.84

0.5

943.9

27

51.65

4

154.4

40

8.42

2.4

56.7

126

14.58

2.4

89.9

0.094.

AMIA_AMN

122

0.37

0.003

7.94

27

0.08

0.025

0.22

40

0.03

0.003

0.117

126

0.06

0.003

0.807

0.12

NITRITE

122

0.04

0.02

0.41

27

0.02

0.02

0.02

40

0.03

0.02

0.04

126

0.03

0.02

0.08

0.287

NITRATE

122

1.94

0.02

9.07

27

0.83

0.03

1.99

40

0.08

0.02

0.46

126

2.44

0.02

13.12

0.070.

REA_PHOS

122

0.04

0.004

0.343

27

0.03

0.012

0.062

40

0.01

0.004

0.02

126

0.03

0.004

0.201

0.797

TOTKN

122

1.48

0.38

12.2

27

1.56

0.88

3.05

40

0.74

0.27

1.46

126

0.85

0.47

2.05

0.070.

TOTPHO

122

0.18

0.009

1.47

27

0.19

0.072

1.037

40

0.04

0.015

0.098

126

0.09

0.013

0.301

0.205

SUSSOL

122

167.42

42

1420

27

93.63

28

350

40

18.53

4

88

126

72.15

34

141

0.009**

DOC

122

7.03

2.6

53.5

27

21.80

8.4

36.5

40

17.65

6.23

39.36

126

7.96

4.4

14.2

0.005**

TOC

122

7.33

2.64

58.79

27

24.54

8.44

44.67

40

18.38

6.28

40.42

126

8.30

4.8

14.99

0.004**

  1. a The detailed descriptions of the water physicochemical properties can be found in Table 2
  2. bAgri_ditches, agricultural drainage ditch sites, including S18, S19, S20, and S21
  3. cAgri_253, site S253 which is situated on a larger agriculturally-dominated stream
  4. d The P values represent the effects of land use classes based on linear mixed-effects modeling. Significance levels are denoted as **, P ≤ 0.01; ., P ≤ 0.1 is considered marginal significant