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Ecological Processes
Fig. 6 | Ecological Processes

Fig. 6

From: Nitrogen uptake strategies of mature conifers in Northeastern China, illustrated by the 15N natural abundance method

Fig. 6

Sensitivity analysis of the proportion of plant N derived from different N sources to the internal plant isotope effect by three and two end-member calculation. (a), (b), and (c) show the effect on the proportional contributions of different N sources to total N uptake by three end-member calculation, when considering combined isotope effect associated with N uptake, transportation and N assimilation (from 2‰ to 6‰); (d) and (e) show the proportional contributions of different N sources to total N uptake by two end-member calculation

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