Table 6 Area and proportion of landscape ecological risk levels from 1989 to 2020.

From: Zoning optimization of ecosystem service value and landscape ecological risk in typical karst areas in southwest China

Ecological risk level

Area (km2)

Proportion (%)

1973

1989

2003

2010

2020

1973

1989

2003

2010

2020

Low ecological risk

109.90

218.75

163.90

354.81

173.70

10.11

20.13

15.08

32.65

15.98

Lower ecological risk

433.55

358.09

509.79

446.42

322.91

39.89

32.95

46.91

41.08

29.71

Moderate ecological risk

338.24

254.38

311.13

169.81

302.58

31.12

23.41

28.63

15.62

27.84

Higher ecological risk

185.87

167.03

90.24

89.50

201.09

17.10

15.37

8.30

8.23

18.50

High ecological risk

19.24

88.57

11.75

26.28

86.53

1.77

8.15

1.08

2.42

7.96

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