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. 2013 Apr 29;8(4):e59031. doi: 10.1371/journal.pone.0059031

Figure 4. The influence of N deposition and climate on heathland plant and soil chemistry.

Figure 4

Calluna foliar N concentrations were principally related to changes in temperature (A). However, positive relationships were seen between Calluna litter N concentrations and total N deposition (B). Soil carbon concentrations were higher in areas receiving greater oxidised N inputs and rainfall (C), and soil C:N ratios were also positively related to levels of oxidised N deposition (D).