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

Författare:
Publiceringsår: 2011
Språk: Engelska
Sidor: 1023-1033
Publikation/Tidskrift/Serie: Soil Biology & Biochemistry
Volym: 43
Nummer: 5
Dokumenttyp: Artikel
Förlag: Pergamon-Elsevier Science Ltd

Sammanfattning

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.

Disputation

Nyckelord

  • Earth and Environmental Sciences
  • Forest fire
  • Soil
  • Fungal growth
  • Bacterial growth
  • Respiration
  • pH

Övriga

Published
  • 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
Yes
  • Microbial Ecology
  • ISSN: 0038-0717

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