Gessner M O, Schwoerbel J
Centre d'Ecologie des Ressources Renouvelables, CNRS, 29 rue Jeanne Marvig, F-31055, Toulouse Cedex, France.
Limnologisches Institut, Universität Konstanz, Mainaustr. 212, D-7750, Konstanz, Federal Republic of Germany.
Oecologia. 1991 Sep;87(4):602-603. doi: 10.1007/BF00320428.
Fungal biomass, measured as ergosterol content, was determined on alder leaf litter incubated during autumn in a softwater Pyrenean stream. The ergosterol content of the leaf litter increased rapidly to a maximum of 462 μg/g detrital dry mass. Ergosterol contents of aquatic Hyphomycetes grown in shake culture were typically ≤5 mg/g mycelial dry mass. Using the corresponding ergosterol-to-biomass conversion factor of 200, peak fungal mass accounted for 9.2% of total system mass, or 10.2% of leaf dry mass. For the period of highest activity (incubation days 7-28), net fungal production on leaf litter was estimated as 2.3 mg d g leaf mass. A conservative estimate of the growth efficiency for the same period was 105 mg mycelial mass per gram leaf mass degraded, assuming that non-leaf organic matter did not constitute an important carbon source supporting fungal production.
以麦角甾醇含量衡量的真菌生物量，是在比利牛斯山脉一条软水溪流中秋季培养的桤木叶凋落物上测定的。叶凋落物中的麦角甾醇含量迅速增加，最高达到462μg/g碎屑干重。在摇瓶培养中生长的水生真菌的麦角甾醇含量通常≤5mg/g菌丝体干重。使用相应的200的麦角甾醇-生物量转换因子，真菌生物量峰值占系统总质量的9.2%，或叶干重的10.2%。在活性最高的时期（培养第7 - 28天），叶凋落物上的真菌净产量估计为2.3mg d g叶质量。假设非叶有机物质不是支持真菌生长的重要碳源，同一时期生长效率的保守估计为每克降解叶质量产生105mg菌丝体质量。
