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Table 5 Test statistics for two MAXENT models from two snail species in Ndumo area, uMkhanyakude, KwaZulu-Natal, South Africa

From: Modelling the spatial and seasonal distribution of suitable habitats of schistosomiasis intermediate host snails using Maxent in Ndumo area, KwaZulu-Natal Province, South Africa

 

Bulinus globosus

Biomphalaria pfeifferi

Annual

Post-rainy

Cold/dry

Hot/dry

Annual

Cold/dry

AUC

0.71

0.91

1

0.86

0.87

0.8

Weighted predictiona

0.80

0.83

0.89

0.86

0.90

0.89

Feature typeb

4

5

4

4

4

4

Variable contribution (%)

 Tampl

24.8

na

0

41.1

4.5

0

 EVI

3.9

0

0

5.6

0

0

 NDWI

42.3

52

54.3

22.5

53.4

37.7

 pH

0

0

0

0

0

0

 Rainfall

3.9

27.7

0

3.5

24.6

1.1

 Slope

22.1

5

7.1

27.5

4.3

3.1

 Tmax

na

15.2

38.6

na

na

58.5

 Tmin

3

0

0

0

13.1

0.6

 NDVI

na

0.1

na

na

na

na

 Habitat threshold valuec

0.468

0.513

0.328

0.686

0.630

0.356

 Suitable habitat area (km2)

125.21

87.04

110.71

16.03

62.61

101.54

 Percent suitable habitats (%)

29.29

20.36

25.89

3.75

14.64

23.75

  1. aThe highest weighted prediction indicates the lowest omission rate
  2. bFeature type classes: 1, linear; 2, linear and quadratic; 3, hinge; 4, linear, quadratic, and hinge; 5, linear, quadratic, hinge, product, and threshold
  3. cHabitat threshold values were based on maximum training sensitivity plus specificity from Maxent model
  4. Abbreviations: AUC area under the curve, EVI Enhanced Vegetation Index, NDWI Normalised Difference Water Index, NDVI Normalised Difference Vegetation Index, T max maximum temperature, T ampl temperature amplitude, T min minimum temperature, na not applicable, the variable was not used due to its high correlation with other variables