Fig. 1. Receiver operating characteristic (ROC) curve and
average test AUC for accuracy analysis of Bufo gargarizan by MaxEnt
model under the current situation.
We found that the most suitable habitats were mainly in the midwest and
the eastern coastal areas from current distribution of B.
gargarizans(Fig.2). The threshold value of MSS method is 0.33, and
according to the distribution probability of B. gargarizans, China is
divided into four grades: highly suitable habitat (HS, P≥0.75); medium
suitable habitat (MS, 0.5≤P<0.75); poorly suitable habitat(PS,
threshold≤P<0.5); unsuitable habitat(US,
threshold<P≤0), and the areas of these four types of habitats
were calculated in Arcgis, as shown in Table 1. Among them, the
unsuitable habitat is 7,216,700 square kilometers, accounting for 75.69
percent of Chinese areas.