Table 1 Results of regression analysis of cumulative impact score (I c ) against the state of coralligenous outcrops using different models.

From: A regional assessment of cumulative impact mapping on Mediterranean coralligenous outcrops

Regression analysis

Model

R 2

SE

Significance level

AICc

Run test

P (%)

no. of runs

Linear

0.40

2.41

***

45.90

57.93

15

Log

0.47

2.28

***

42.93

59.19

15

Log-Linear

0.42

0.33

***

−57.02

57.93

15

Log-Log

0.51

0.31

***

−61.50

43.23

14

Ranks of cumulative impact score

 

Thresholds

Degradation level

Halpern et al. 6

Linear

Log

Log-Linear

Log-log

10 (Low)

1.40

5.55

3.78

5.07

3.86

30 (Medium)

4.95

7.58

8.00

6.79

7.19

50 (Medium-High)

8.47

9.62

9.97

9.10

9.59

70 (High)

12.00

11.66

11.26

12.18

11.60

90 (Very high)

15.52

13.69

12.23

16.31

13.37

  1. Results of AICc and run tests were also reported. SE = standard error of regression. ***P < 0.001. For each model, the corresponding thresholds for ranks of cumulative impact score were provided. Thresholds from Halpern et al.6 were also reported.