Long-term warming alters soil and enzymatic N:P stoichiometry in subarctic tundra

- Warming decreased mineral N and increased mineral P during mid-growing season.
- In parallel, warming decreased acid-phosphatase activity and microbial P.
- Simulated herbivory on deciduous shrubs had interactive effects with warming.
- Warming altered enzymatic N:P ratio irrespective of simulated herbivory.