Fungi-to-bacteria ratio in soils of European Russia
| Autor: | Nadezhda Ananyeva, V. N. Kudeyarov, Simona Castaldi, E. V. Stolnikova, Riccardo Valentini |
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| Přispěvatelé: | Ananyevaa, N. D., Castaldi, Simona, Stolnikovaa, E. V., Kudeyarova, V. N., Valentini, R. |
| Rok vydání: | 2014 |
| Předmět: |
geography
geography.geographical_feature_category Steppe Ecology Soil organic matter Taiga Soil Science Soil classification Soil carbon complex mixtures Tundra soil selective inhibition Agronomy substrate-induced respiration fungi-to-bacteria ratio microbial biomass carbon Soil pH Soil water Environmental science Agronomy and Crop Science |
| Zdroj: | Archives of Agronomy and Soil Science. 61:427-446 |
| ISSN: | 1476-3567 0365-0340 |
| Popis: | The selective inhibition technique by specific antibiotics (streptomycin, cycloheximide) applied to substrate-induced respiration (SIR) measurement was used to test the relative contribution of fungi to bacteria (F/B ratio) to the overall microflora-induced activity in soils of European Russia. Investigated soils covered a wide climatic transect and different ecosystem types including managed vs. natural ecosystems. Before direct comparison among sites, the antibiotic inhibition technique was optimized for soil characteristics. Once the optimal concentration was set, the combined effect of the two antibiotics resulted in average 60% inhibition of SIR. The analyzed sites (in total 47) including various biomes (tundra, middle taiga, southern taiga, subtaiga, dark coniferous forests outside the boreal region, steppe, mountain forests and arable sites), were characterized by a wide range of soil pHw (3.95–7.95), soil organic carbon (0.69–24.08%), soil microbial biomass carbon (149–5028 µg C g−1 soil) and soil basal respiration (0.24–8.28 µg CO2-C g−1 soil h−1). In all the analyzed sites, a predominance of fungal over bacteria activity was observed with F/B ratios always higher than one (4.9 on average). Natural sites were characterized by higher F/B ratios (on average 5.6) compared to agricultural ones (on average 3.5). |
| Databáze: | OpenAIRE |
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