Table 1 Environmental variables used in the ENM and their sources
From: Environmental suitability for lymphatic filariasis in Nigeria
Variables | Source |
|---|---|
Annual cumulative precipitation | WorldClim [29] |
Maximum temperature | |
Mean temperature | |
Minimum temperature | |
Mean temperature of the coldest quarter | |
Mean temperature of the warmest quarter | |
Precipitation of the driest quarter | |
Precipitation of the wettest quarter | |
Potential evapo-transpiration (PET) | CGIAR-CSI [30] |
Aridity index | |
Elevation | SRTM [31] |
Slope | Derived from elevation |
Flow accumulation | Derived from slope |
Distance to permanent rivers | Digital Global Chart [34] |
Distance to nearest water bodies | Global Database of Lakes, Reservoirs and Wetlands [33] |
Land surface temperature (LST) | AfSIS [35] |
Enhanced vegetation index (EVI) | |
Sand, silt, clay fractions | ISRIC [37] |
Soil pH | |
Major land cover (forest, agriculture, shrubland-grassland) | Arino et al [36] |
Wetness index | Derived from slope and flow accumulation |
Distance to stable lights 2006 | Elvidge et al. [38] |