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The effect of groundwater depth on the δ13C value of constructive species leaf in the lower reaches of the Tarim River Tempo-Spatial Variations in the Stomatal Density and δ13C Value of Quercus liaotungensis Leaves Changes of foliar δ13C value of Quercus fabric in different root underground habitat types in Karst area. Responses of Foliar δ13C Values of Woody Plants to Different Karst Rocky Desertification Degrees in Huajiang Gorge, Guizhou Characteristics of foliar δ13C values of common shrub species in various microhabitats with different karst rocky desertification degrees. Relationship among Leaf Anatomical Characters and Foliar δ13 C Values of Six Woody Species for Karst Rocky Desertification Areas Effects of Enhanced UV-B Radiation on δ13C Values and Physiological Feature in Tobacco Leaves