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Table 2 The suitable range and percent contribution of each environmental condition for scrub typhus occurrence

From: Scrub typhus in Jiangsu Province, China: epidemiologic features and spatial risk analysis

Variable

Description(unit)

Suitable rangea

Percent contributiond

BIO_01

Annual mean temperature(°C)

11.3–14.3

1.8

BIO_02

Mean diurnal range

8.7–10.7

14.5

BIO_04

Temperature seasonality

920.0–980.0

24.9

BIO_05

Max temperature of warmest month(°C)

31.7–32.8

1.1

BIO_06

Min temperature of coldest month(°C)

−4.2 to-1.2

19.9

BIO_12

Annual precipitation (mm)

740.0–1000.0

3.6

BIO_13

Precipitation of wettest month (mm)

196.0–275.0

8.7

BIO_14

Precipitation of driest month (mm)

17.0–28.0

2.0

BIO_15

Precipitation seasonality (mm)

58.0–82.0

3.6

prec

Precipitation (mm)

22.0–71.0

0.5

tavg

Monthly average temperature (°C)

8.9–11.1

5.6

wind

Wind speed (m s-1)

2.2–2.5

1.6

NDVI

Normalized difference vegetation index

0.18–0.39

7.5

LC

Land cover type

7,13,14b

4.7

DEM

Altitude(m)

nonec

0.0

Aspect

Aspect

nonec

0.0

Slope

Slope

nonec

0.0

  1. aThe suitable range of each variable indicates the conditions within which the probability of scrub typhus occurrence is higher than 50%
  2. b7: Open shrublands; 13: Urban and Built-up; 14: Cropland-Natural Vegetation Mosaic. The combination of these classes could be found in and around the countryside
  3. cNonemeans this environmental factor has little effect on the final model construction
  4. dThe percentage contribution illustrates the relative contributions of the environmental variables to the final training Maxent model using the averages of the repeated 10 runs