Nitrogen fertilization reduces the standing biomass, abundance, and size of Cenococcum sclerotia: a ubiquitous but rarely quantified ectomycorrhizal soil carbon pool.

ABSTRACT: Unlike most ectomycorrhizal (EM) fungi, Cenococcum geophilum is a prolific producer of sclerotia, which represent a large and persistent, yet rarely quantified pool of EM fungal biomass and carbon in soils. How biomass of these asexual propagules is impacted by global change factors, such as anthropogenic nitrogen (N) deposition, remains unquantified. This study examined the effects of long-term experimental N fertilization on the standing biomass, abundance, and size of C. geophilum sclerotia in an oak (Quercus spp.) savanna ecosystem at Cedar Creek Ecosystem Science Reserve in Minnesota, USA. Standing sclerotia biomass in the control treatment averaged 192 g m^-2 (95% CI = 136-267 g m^-2) and declined sharply under N enrichment, by 44% (95% CI = -53-79%) and 66% (95%

SUBMITTER: Fernandez CW 

PROVIDER: S-EPMC12824604 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature