Fig 1.
Sample distribution of R. roxburghii and G. molesta.
Blue triangles indicate occurrence sites of R. roxburghii, and red circles indicate occurrence sites of G. molesta. Map Review Number: GS(2019)1822.
Table 1.
The 19 bioclimatic variables and their descriptions.
Fig 2.
ΔAICc values of R. roxburghii (left) and G. molesta (right) under different combinations of feature classes and regularization multipliers.
The x-axis represents the regularization multiplier, tested from 1 to 4 with a step size of 0.5. The y-axis indicates the feature class combinations: linear (L), linear + quadratic (LQ), and linear + quadratic + hinge (LQH).
Fig 3.
Model performance evaluation for the optimal models of R. roxburghii (left) and G. molesta (right).
The x-axis represents the predicted habitat suitability, and the y-axis indicates the ratio of predicted to expected occurrence frequency (Predicted/Expected ratio). The dashed line represents the reference where predicted frequency equals expected frequency. Values above 1 indicate relative enrichment of species occurrence points within the corresponding suitability interval, demonstrating consistency between model predictions and observed distributions. The Boyce index quantifies the correlation between predicted habitat suitability and observed occurrence frequency; positive values indicate that model predictions are better than random, with higher values reflecting superior predictive performance.
Fig 4.
Permutation importance of selected bioclimatic variables for R. roxburghii (left) and G. molesta (right).
Higher values indicate greater influence of the variable on model predictions.
Fig 5.
Potential suitable habitat of R. roxburghii under current and future climate scenarios.
Different colors indicate habitat suitability categories, including low, moderate, and high suitability areas. Map Review Number: GS(2019)1822.
Fig 6.
Stacked bar chart showing the proportional area of R. roxburghii habitat suitability under current and future climate scenarios.
The x-axis represents different climate scenarios, and the y-axis represents the proportion of each suitability category. Different colors indicate low, moderate, and high suitability areas.
Fig 7.
Potential suitable habitat of G. molesta under current and future climate scenarios.
Different colors indicate habitat suitability categories, including low, moderate, and high suitability areas. Map Review Number: GS(2019)1822.
Fig 8.
Stacked bar chart showing the proportional area of G. molesta habitat suitability under current and future climate scenarios.
The x-axis represents different climate scenarios, and the y-axis represents the proportion of each suitability category. Different colors indicate low, moderate, and high suitability areas.
Fig 9.
Distribution of R. roxburghii and G. molesta suitable areas (HSA + MSA + LSA) under current and future climate scenarios.
Red areas indicate regions where the suitable habitats of the two species overlap. Map Review Number: GS(2019)1822.
Fig 10.
Overlapping moderate- to high-suitability areas (HSA + MSA) of R. roxburghii and G. molesta under current and future climate scenarios.
Red areas indicate regions where the suitable habitats of the two species overlap. Map Review Number: GS(2019)1822.
Fig 11.
Overlapping high-suitability areas (HSA) of R. roxburghii and G. molesta under current and future climate scenarios.
Red areas indicate regions where the suitable habitats of the two species overlap. Map Review Number: GS(2019)1822.