As its closest relatives in the Endogone genus, some Youngiomyces species have been found in soils rich in organic matter, below mosses and leaf-litter. Youngiomyces spp. are considered saprotrophs although they might also be ectomycorrhizal as other members of the Endogonaceae family (Warcup, 1990). Indeed, Trappe and colleagues described the Pseudotsuga genus as the mycorrhizal host of Youngiomyces stratosus in the pacific northwest of the United States (USDA, 2015). Due to its limited distribution little is know about its ecological role, however, as other saprotrophs they might be important in the recycling of organic matter.
Most members of the Endogonaceae family produce an odor that attracts small mammals and encourage them to eat their fruiting bodies, and so spread their spores by their feces (Alexopoulos, Mims, & Blackwell, 1996). The sporocarp of some Youngiomyces spp. have been described as having the odor of burnt sugar which may be playing the attracting role mentioned above. Although, it has not been studied for all the species (Vidal et al., 1997).