Variation in the Stable Carbon and Nitrogen Isotope Composition of Plants and Soil along a Precipitation Gradient in Northern China
Figure 5
Leaf δ13C (a) and δ15N (b) values as a function of mean annual precipitation in Nitraria sibirica (circle, solid line), Reaumuria soongorica (square, dash line) and Hedysarum mongolicum (diamond, dotted line).
R2 and P values of linear correlations are provided.