Does soil ergosterol concentration provide a reliable estimate of soil fungal biomass

By Xiaorong Zhao, Q. Lin, P. Brookes. 2005

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Evaluation of methods to estimate production, biomass and turnover of ectomycorrhizal mycelium in forests soils : A review (2013, methodology): “However, other studies suggest a slow metabolism of ergosterol under certain circumstances, such as disruption of below ground C allocation, increased N loads, addition of toxic compounds like pesticides, or existence of substantial amounts of free ergosterol in soil for considerable periods with li”
Interactions Between Xenobiotics and Microbial and Enzymatic Soil Activity (2008, background): “The reliability of ergosterol assay (Zhao et al., 2005) in combination with plate counting to better understand the effects of agrochemicals on soil fungal population was recently confirmed by the findings of X.”
Methods for evaluating human impact on soil microorganisms based on their activity, biomass, and diversity in agricultural soils (2006, background): “However, neither PLFA nor ergosterol disappear immediately after cell death (Zelles et al., 1997; Zhao et al., 2005).”
Impact of salinity on soil microbial communities and the decomposition of maize in acidic soils (2006, background): “In addition, it cannot be totally excluded that ergosterol from dead fungi was measured (Zhao et al., 2005), as degradation of ergosterol is hampered especially in saline conditions.”