Specific antibiotics and nematode trophic groups agree in assessing fungal: bacterial activity in agricultural soil

Søren Christensen; Marie Dam; Mette Vestergård Madsen; Søren O. Petersen; Jørgen Eivind Olesen; Per Schjønning

doi:10.1016/j.soilbio.2012.05.018

Specific antibiotics and nematode trophic groups agree in assessing fungal: bacterial activity in agricultural soil

Søren Christensen, Marie Dam, Mette Vestergård Madsen, Søren O. Petersen, Jørgen Eivind Olesen, Per Schjønning

Terrestrial Ecology

6 Citations (Scopus)

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.

Original language	English
Journal	Soil Biology & Biochemistry
Volume	55
Pages (from-to)	17-19
Number of pages	3
ISSN	0038-0717
DOIs	https://doi.org/10.1016/j.soilbio.2012.05.018
Publication status	Published - Dec 2012

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title = "Specific antibiotics and nematode trophic groups agree in assessing fungal: bacterial activity in agricultural soil",

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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language = "English",

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T1 - Specific antibiotics and nematode trophic groups agree in assessing fungal

T2 - bacterial activity in agricultural soil

AU - Christensen, Søren

AU - Dam, Marie

AU - Madsen, Mette Vestergård

AU - Petersen, Søren O.

AU - Olesen, Jørgen Eivind

AU - Schjønning, Per

PY - 2012/12

Y1 - 2012/12

N2 - 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.

AB - 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.

U2 - 10.1016/j.soilbio.2012.05.018

DO - 10.1016/j.soilbio.2012.05.018

M3 - Journal article

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VL - 55

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EP - 19

JO - Soil Biology & Biochemistry

JF - Soil Biology & Biochemistry

ER -

Specific antibiotics and nematode trophic groups agree in assessing fungal: bacterial activity in agricultural soil

Abstract

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