Fig. 1: Environmental factors included in the ecological niche modelling (ENM) analyses of Mastomys natalensis and Lassa virus, and their corresponding ENM response curves.

Response curves and relative importance (RI) obtained for the ENM analyses of M. natalensis and Lassa virus are coloured in red and green, respectively. The ten response curves reported for each ENM analysis correspond to ten independent repetitions of the boosted regression trees (BRT) analysis. These response curves indicate the relationship between the environmental values and the response (i.e., the ecological suitability of M. natalensis or Lassa virus). In addition to the seven environmental factors displayed in this figure, two additional factors were also included in the ENM analyses, the non-forested primary land, and non-forested secondary land.