Publication Details

Category Text Publication
Reference Category Preprints
DOI 10.2139/ssrn.4724438
Title (Primary) Unravelling the facilitation-competition continuum among ectomycorrhizal and saprotrophic fungi
Author Pena, R.; Awad, A.; Nawaz, A.; Shang, Y.; Wubet, T. ORCID logo ; Tibbett, M.
Source Titel SSRN
Year 2024
Department BZF
Language englisch
Topic T5 Future Landscapes
Abstract Soil fungal inter-guild interactions may impact ecosystem processes significantly. In particular, the competitive interactions between ectomycorrhizal and saprotrophic fungi could reduce organic matter decomposition through the 'Gadgil effect'. Whether fungal facilitative and competitive reciprocal interactions predictably shift with increasing moderate environmental stress, as hypothesised by the stress-gradient hypothesis (SGH), is still uncertain, particularly with regard to multiple environmental resource gradients. Here, we quantified the reciprocal interactions among fungal guilds in the root tips and soil mycelia in 84 temperate forests of various tree compositions comprising a natural gradient of soil fertility and root carbon resources. The two resource gradients were negatively related. In keeping with SGH, we found that the typical interactions between fungal guilds were symmetrically positive at the lowest end of the soil fertility or root resource gradients. The interactions were negative in the more fertile soils or when the root resources were more available. The inter-guild interactions varied with the spatial niche (i.e, root tips or soil mycelium) and the type of resource gradients. In general, the root carbon resources impacted the interactions in the root tip more than soil mycelium communities. When both gradients were integrated, SGH held for the dominant gradient in the system. The premises of the “Gadgil effect” became apparent with increasing soil fertility. The soil fungal guilds revealed symmetrical facilitative interactions under conditions of lower soil pH and a drier and warmer climate resembling global change scenarios. These interactions potentially aid in the preservation of soil biodiversity and the support of forest ecosystem function.
Persistent UFZ Identifier
Pena, R., Awad, A., Nawaz, A., Shang, Y., Wubet, T., Tibbett, M. (2024):
Unravelling the facilitation-competition continuum among ectomycorrhizal and saprotrophic fungi
SSRN 10.2139/ssrn.4724438