Fig. 5: Locations of the selected 12 largest karst regions.
From: Bedrock geochemistry influences vegetation growth by regulating the regolith water holding capacity
The selected karst regions are located at mid-latitudes (i.e., 30° to 60°N) in the Northern Hemisphere. The dark gray, and blue parts are the carbonate rock areas. The relationship between the NDVI and the growth season (April–September) mean temperature (RNDVI-T) was calculated at the pixel level. Subsequently, the difference in RNDVI-T between the inner and outer areas of carbonate rock buffer zones (with a width of 50 km) using a Mann–Whitney Wilcoxon test. Bars represent means for each treatment and error bars are 95% confidence intervals of the mean. Blue graphs indicate that the RNDVI-T value in the inner carbonate rock area is significant different with the outer area, dark gray graphs indicate that there are non-significant difference in RNDVI-T between both areas.
