Carbon isotopes of C3 herbs correlate with temperature on removing the influence of precipitation across a temperature transect in the agro-pastoral ecotone of northern China.

After removing the potential precipitation effect, the slopes of the regression between δ 13 C and AMP were extremely significant for Artemisia lavandulaefolia ( p = .0002; Figure 4 a) and Artemisia capillaries ( p = .0044; Figure 4 b), and the correlation coefficients of corrected δ 13 C for temperature were significantly higher when compared with ones of raw δ 13 C for temperature ( p = .024 and .037, respectively; Figure 4 a,b).

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