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Fungal and bacterial recolonisation of acid and alkaline forest soils following artificial heat treatments

Barcenas-Moreno, Gema; Rousk, Johannes LU and Bååth, Erland LU (2011) In Soil Biology & Biochemistry 43(5). p.1023-1033
Abstract
The direct response and the short-term recolonisation of soil by fungi and bacteria were studied after heat treatments of a humus soil with high carbon content and low pH. and a calcareous soil with lower carbon content and high pH. Heating was administered using a muffle furnace or an autoclave, with different temperatures and times of heat exposure, after which fresh soil (1%) was added as inoculum. Autoclaved soil showed more marked increases in bacterial growth during the recovery phase than oven-heated soil, and the bacterial growth response was more rapid in calcareous than in humus soil. Fungal growth recovered more rapid and reached values higher than the control in humus soil, while it remained low until the end of the study in... (More)
The direct response and the short-term recolonisation of soil by fungi and bacteria were studied after heat treatments of a humus soil with high carbon content and low pH. and a calcareous soil with lower carbon content and high pH. Heating was administered using a muffle furnace or an autoclave, with different temperatures and times of heat exposure, after which fresh soil (1%) was added as inoculum. Autoclaved soil showed more marked increases in bacterial growth during the recovery phase than oven-heated soil, and the bacterial growth response was more rapid in calcareous than in humus soil. Fungal growth recovered more rapid and reached values higher than the control in humus soil, while it remained low until the end of the study in calcareous soil. Respiration rate showed similar patterns in both soils. Fungal biomass (ergosterol and PLFA 18:2w6.9) indicated that fungi benefited by autoclaving in humus soil, while they were disfavoured by this treatment in calcareous soil. The sum of bacterial PLFAs did not change due to heating, but some bacterial PLFAs (e.g. cy17:0) increased in both soils. We propose that the community assembly of the microbial communities after heating were mainly driven by pH, in that the high pH soil selected primarily for bacteria and the low pH soil for fungi. (C) 2011 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Forest fire, Soil, Fungal growth, Bacterial growth, Respiration, pH
in
Soil Biology & Biochemistry
volume
43
issue
5
pages
1023 - 1033
publisher
Elsevier
external identifiers
  • wos:000289219500020
  • scopus:79952447363
ISSN
0038-0717
DOI
10.1016/j.soilbio.2011.01.019
project
Interaction between fungi and bacteria in soil
Effect of environmental factors on fungal and bacterial growth in soil
Microbial carbon-use efficiency
Carbon drivers and microbial agents of soil respiration
BECC
language
English
LU publication?
yes
id
4004f90f-c79a-498b-9300-6a26232c2299 (old id 1918231)
date added to LUP
2011-05-13 12:01:31
date last changed
2017-08-06 04:21:42
@article{4004f90f-c79a-498b-9300-6a26232c2299,
  abstract     = {The direct response and the short-term recolonisation of soil by fungi and bacteria were studied after heat treatments of a humus soil with high carbon content and low pH. and a calcareous soil with lower carbon content and high pH. Heating was administered using a muffle furnace or an autoclave, with different temperatures and times of heat exposure, after which fresh soil (1%) was added as inoculum. Autoclaved soil showed more marked increases in bacterial growth during the recovery phase than oven-heated soil, and the bacterial growth response was more rapid in calcareous than in humus soil. Fungal growth recovered more rapid and reached values higher than the control in humus soil, while it remained low until the end of the study in calcareous soil. Respiration rate showed similar patterns in both soils. Fungal biomass (ergosterol and PLFA 18:2w6.9) indicated that fungi benefited by autoclaving in humus soil, while they were disfavoured by this treatment in calcareous soil. The sum of bacterial PLFAs did not change due to heating, but some bacterial PLFAs (e.g. cy17:0) increased in both soils. We propose that the community assembly of the microbial communities after heating were mainly driven by pH, in that the high pH soil selected primarily for bacteria and the low pH soil for fungi. (C) 2011 Elsevier Ltd. All rights reserved.},
  author       = {Barcenas-Moreno, Gema and Rousk, Johannes and Bååth, Erland},
  issn         = {0038-0717},
  keyword      = {Forest fire,Soil,Fungal growth,Bacterial growth,Respiration,pH},
  language     = {eng},
  number       = {5},
  pages        = {1023--1033},
  publisher    = {Elsevier},
  series       = {Soil Biology & Biochemistry},
  title        = {Fungal and bacterial recolonisation of acid and alkaline forest soils following artificial heat treatments},
  url          = {http://dx.doi.org/10.1016/j.soilbio.2011.01.019},
  volume       = {43},
  year         = {2011},
}