Abstract
A major goal in attempting to understand plant succession is to assess the implications of fungal and bacterial biomass changes over time as plant-soil systems develop. In this study, the soil fungal and bacterial biomass of three successional semi-arid steppe communities, sampled 4, 12, and 38 years after cultivation ended, were compared with an uncultivated native plant community using microscopic procedures. In the course of the succession, significant increases in fungal hyphal lengths occurred, reaching a maximum in the oldest successional (38-year) community. Active (cytoplasm filled) hyphae decreased along the chronosequence, with the native plant community having the lowest values. Similar decreases in active bacterial biomass values occurred. In contranst, microscopically determined total bacterial numbers did not differ in soils associated with the 4-year-old and native plant communities. The ratio of active bacterial to fungal biomass, which increased over the chronosequence tested in this study, appears to provide a valuable integrative measure of plant-soil resource system development and ecosystem maturity.
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Klein, D.A., McLendon, T., Paschke, M.W. et al. Saprophytic fungal-bacterial biomass variations in successional communities of a semi-arid steppe ecosystem. Biol Fertil Soils 19, 253–256 (1995). https://doi.org/10.1007/BF00336168
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DOI: https://doi.org/10.1007/BF00336168