Specific antibiotics and nematode trophic groups agree in assessing fungal:bacterial activity in agricultural soil |
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| Institution: | 1. Terrestrial Ecology, Biological Institute, Copenghagen University, Universitetsparken 15, DK-2100 København Ø, Denmark;2. Institute for Agroecology, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark;1. Advanced Analysis and Testing Center, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China;2. Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, China;3. Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, 73019, USA;4. Administrative Bureau of Wuyishan National Nature Reserve, Wuyishan, Fujian, 354300, China;5. College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China;1. Department of Entomology, NY State Agricultural Experiment Station, Cornell University, Geneva, NY 14456, United States;2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;1. Laboratory of Ecology & Environmental Sciences, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece;2. Laboratory of Agricultural Zoology and Entomology, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece;3. Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, The Netherlands;1. Department of Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland;2. Heilongjiang Academy of Forestry, Haping Road 134, Harbin 150081, China;3. Institute of Environmental Sciences, Kazan Federal University, 420008 Kazan, Russia |
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| Abstract: | There are no methods at hand with a long and proven record for assessing the relative contribution of fungi and bacteria to decomposer activity in soil. Whereas a multitude of methods to determine fungal and bacterial biomass are available, activity assays traditionally relied on the substrate-induced respiration (SIR) inhibition approach. Here we compare fungal contribution to the microbial active biomass assessed by the SIR inhibition method with the contribution of fungal-feeding nematodes to the microbial-feeding nematode community. Four cultivation systems on the same soil that differ in carbon inputs with a factor two ranked exactly the same with the two methods. A conventionally farmed rotation with low organic input had the lowest fungal fraction, while three organically farmed soils ranked higher. |
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