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Table 2 Summary temperature data from synthesis of Group 2: Large scale studies (meadows/moorland vs forests)

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

Parameter

No. of effect sizes (no.independent articles)

Range

(1)Weighted average (* = Heterogeneity P <0.05)

(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 influence

Mean

10(10)

0.25–5.23

1.48*

1.68*

-

P = 0.27

yes1

   

(0.60, 2.36)

(0.73, 2.63)

   

Summer mean

7(7)

0.75–5.23

1.39

2.03*

-

P = 0.43

Ns

   

(0.68, 2.10)

(0.85, 3.21)

   

Spring mean

6(6)

−0.05–2.67

1.48*

1.61*

-

P = 0.97

yes2

   

(0.21, 2.76)

(0.79, 2.42)

   

Max

5(5)

1.37–6.89

4.94*

4.51*

-

P = 0.52

Ns

   

(2.70, 7.17)

(2.17, 6.84)

   

Summer max

3(3)

1.37–6.27

2.58

3.73*

-

-

Ns

   

(0.25, 4.90)

(0.95, 6.50)

   

Spring max

2(2)

3–6.89

6.610

4.95*

-

-

Ns

   

(4.66, 8.56)

(1.14, 8.75)

   
  1. 1Removal of Harding et al. 2006 [36] decreases the effect size but it is still positive.
  2. 2Removal of Harding et al. 2006 [36] decreases the effect size while removal of Dineen et al. 2007 [35] increases the effect size.