The contribution of environmental variables to the epiphyllous liverwort distribution is shown in Fig. 3. Fig. 3a and b indicates that topographic variables (e.g. altitude, slope and aspect) result in very little gain for the clim-topo and the veg-topo model, suggesting they barely contribute to the prediction of epiphyllous liverworts. Of the climatic variables, temperature seasonality, minimum temperature of the coldest month, temperature annual range, mean temperature of the driest quarter, mean temperature of the coldest quarter, annual precipitation, precipitation of the wettest month, precipitation in the wettest quarter, and precipitation in the warmest quarter were variables producing high gains (>1.5) in defining the epiphyllous liverworts’ distribution (Fig. 3a). The vegetation indices including mean NDVI, minimum NDVI, mean NDWI, and minimum NDWI (training gain > 2.0) were among the important satellite-derived vegetation variables contributing to the predicted distribution (Fig. 3b). These important nine climatic variables and four vegetation indices were used as environmental input variables in the combined model, and the result shows that the contribution of each of the four vegetation indices was superior to that of the nine climatic variables for habitat suitability for epiphyllous liverworts
The contribution of environmental variables to the epiphyllous liverwort distribution is shown in Fig. 3. Fig. 3a and b indicates that topographic variables (e.g. altitude, slope and aspect) result in very little gain for the clim-topo and the veg-topo model, suggesting they barely contribute to the prediction of epiphyllous liverworts. Of the climatic variables, temperature seasonality, minimum temperature of the coldest month, temperature annual range, mean temperature of the driest quarter, mean temperature of the coldest quarter, annual precipitation, precipitation of the wettest month, precipitation in the wettest quarter, and precipitation in the warmest quarter were variables producing high gains (>1.5) in defining the epiphyllous liverworts’ distribution (Fig. 3a). The vegetation indices including mean NDVI, minimum NDVI, mean NDWI, and minimum NDWI (training gain > 2.0) were among the important satellite-derived vegetation variables contributing to the predicted distribution (Fig. 3b). These important nine climatic variables and four vegetation indices were used as environmental input variables in the combined model, and the result shows that the contribution of each of the four vegetation indices was superior to that of the nine climatic variables for habitat suitability for epiphyllous liverworts
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