Mycelia‐derived C contributes more to nitrogen cycling than root‐derived C in ectomycorrhizal alpine forests

Plant roots and their associated microbial symbionts impact carbon (C) and nutrient cycling in ecosystems, but estimates of the relative contributions of root‐ versus microbe‐derived dynamic inputs are highly uncertain. Roots release C into soil via exudation and turnover (i.e., root‐derived C), but also by allocating C to mycorrhizal fungal mycelia, which exude C and undergo turnover (i.e., mycelia‐derived C). Given that the relative...