Аннотация:Mycorrhizal fungi represent a potentially abundant carbon resource for soil animals, but their role in soil food webs remains
poorly understood. To detect taxa that are trophically linked to the extraradical mycelium of mycorrhizal fungi, we used
stable isotope (13C) labelling of whole trees in combination with the in-growth mesh bag technique in two coniferous forests.
This allowed us to detect the flux of carbon in the mycelium of mycorrhizal fungi, and consequently in the tissues of soil
invertebrates. The mycorrhizal fungal genera constituted 93.5% of reads in mycelium samples from the in-growth mesh bags.
All mycelium from in-growth mesh bags and about 32% of the invertebrates sampled (in total 11 taxa) received the 13C label
after 45 days of exposure. The extent of feeding of soil invertebrates on the mycelium of mycorrhizal fungi depended on the
taxonomic affinity of the animals. The strongest trophic link to the mycorrhiza-derived carbon was detected in Isotomidae
(Collembola) and Oppiidae (Oribatida). The label was also observed in the generalist predators, indicating the propagation of
mycorrhiza-derived carbon into the higher trophic levels of the soil food web. Higher 13C labelling in the tissues of euedaphic
Collembola and Oribatida compared to atmobiotic and hemiedaphic families indicates the importance of mycorrhizal fungi
as a food resource for invertebrates in deeper soil horizons.