Figure 4 | Scientific Reports

Figure 4

From: Continental scale variability of foliar nitrogen and carbon isotopes in Populus balsamifera and their relationships with climate

Figure 4

Relationship between residual Δ13C and mean annual precipitation (log transformed MAP) and the square root of elevation. For the plot with mean annual precipitation, residual Δ13C is calculated relative to a model that only includes the effect of elevation. Similarly, for the plot with elevation, residual Δ13C is calculated relative to a model that only includes the effect of precipitation. Global observations from previous work28 in black, P. balsamifera observations (this study) in grey.

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