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Table 1 Summary temperature data (°C) from synthesis of Group 1: Local scale studies

From: What are the effects of wooded riparian zones on stream temperature?

Parameter

No. of effect sizes (no. independent articles)

Range

(1)Weighted average

(2)Unweighted average (* = heterogeneity P <0.05)

(3)Aggregated weighted average

(4) Publication bias? p-value of Egger’s test (on aggregated data)

(5) Test of study infuence1

(6) Effect of buffer width? P-value, coefficient and its SE

Mean

8 (6)

0 – 0.74

0.39

0.22

0.39

P = 0.60

Ns

P = 0.85

   

(-0.13, 0.91)

(-0.30,0.75)

(-0.140,0.92)

  

coef = 0.01

        

0.06 (SE)

Summer mean

5(4)

0.03– 1.36

0.57

0.71*

0.63

P = 0.49

Ns

P = 0.62

   

(0.14, 1.00)

(0.25,1.18)

(0.06, 1.20)

  

coef = 0.04

        

0.07(SE)

Spring mean

4(3)

0.1– 0.72

0.26

0.29

0.23

-

Ns

P = 0.79

   

(-0.80, 1.3)

(-0.77, 1.35)

(-0.92,1.37)

  

coef = 0.25

        

0.92 (SE)

Max

9(7)

0.86– 6.99

3.16

3.08

3.37

P = 0.82

Ns

P = 0.44

   

(2.06, 4.27)

(1.91,4.25)

(1.74, 5.01)

  

coef = 0.06

        

0.08 (SE)

Summer max

7(5)

1.79– 8.08

3.26

3.42*

3.46

P = 0.53

Ns

P = 0.08

   

(2.20, 4.32)

(1.85,4.98)

(1.96,4.95)

  

coef = 0.13

        

0.07(SE)

Spring max

3(2)

1.48– 3.04

2.60

2.30

2.71

-

Ns

-

   

(0.58, 4.62)

(0.27,4.32)

(0.52,4.91)

   
  1. 1Ns = no significant effect of the removal of any individual stud.