Nitrogen concentration within Saxifraga oppositifolia in different successional stages on a glacier foreland in the high Arctic

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We measured and compared the δ^<13>C values and nitrogen concentrations within the photosynthetic parts (Np) of phototrophs growing in different successional stages and different soil conditions at Ny-Alesund, Svalbard, Norway. At all study sites, the Np value of vascular plants ranged from 1.0 to 2.2%. The Np value for most moss species was less than 1.0%; values for lichens were about 0.5%. No significant correlation was detected between Np and δ^<13>C; however, different plant species occupied distinct fields on a δ^<13>C-Np plot, with minimal overlap between species. The Np value of Saxifraga oppositifolia, which grew at all of the study sites, ranged from 1.1 to 1.5%. Differences in growth form had no effect on Np. The Np and δ^<13>C values obtained for S. oppositifolia were confined to within a narrow range regardless of site conditions.
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