Dataset to the publication: Microbial nitrogen transformations in tundra soil depend on interactive effects of seasonality and plant functional types ...

• Main Authors: Koranda, Marianne, Michelsen, Anders
• Format: Dataset
• Language: unknown
• Published: Mendeley Data 2024
• Subjects: Above-Below Ground Interactions; Biogeochemistry; Tundra Biome; Nitrogen Cycle; Northern Sweden; Subarctic; Tundra
• Online Access: https://dx.doi.org/10.17632/vy6crrtywn.1; https://data.mendeley.com/datasets/vy6crrtywn/1

Nitrogen (N) cycling in organic tundra soil is characterised by pronounced seasonal dynamics and strong influence of the dominant plant functional types. Such patterns in soil N-cycling have mostly been investigated by the analysis of soil N-pools and net N mineralisation rates, which, however, yield little information on soil N-fluxes. In this study we investigated microbial gross N-transformations, as well as concentrations of plant available N-forms in soils under two dominant plant functional types in tundra heath, dwarf shrubs and mosses, in subarctic Northern Sweden. We collected organic soil under three dwarf shrub species of distinct growth form and three moss species in early and late growing season. Our results showed that moss sites were characterised by significantly higher microbial N-cycling rates and soil N-availability than shrub sites. Protein depolymerisation, the greatest soil N-flux, as well as gross nitrification rates generally did not vary significantly between early and late growing ...