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Microbial growth responses upon rewetting soil dried for four days or one year

Meisner, Annelein LU ; Bååth, Erland LU and Rousk, Johannes LU (2013) In Soil Biology & Biochemistry 66. p.188-192
Abstract
A pulse of respiration is induced by rewetting dry soil. Here we study the microbial responses underlying this pulse of respiration when rewetting soil dried for 4-days or 1-year. In the 4-days dried soil, respiration increased to a maximum rate immediately upon rewetting after which it decreased exponentially. In the 1-year dried soil, respiration also increased immediately, but then remained high for 16 h, after which it increased further, exponentially, with a peak rate after 20 h. The level of bacterial growth was initially lower in rewetted than in constantly moist soil, but started to increase linearly immediately upon rewetting 4-days dried soil. In 1-year dried soil, bacterial growth started only after a 16 h lag period of zero... (More)
A pulse of respiration is induced by rewetting dry soil. Here we study the microbial responses underlying this pulse of respiration when rewetting soil dried for 4-days or 1-year. In the 4-days dried soil, respiration increased to a maximum rate immediately upon rewetting after which it decreased exponentially. In the 1-year dried soil, respiration also increased immediately, but then remained high for 16 h, after which it increased further, exponentially, with a peak rate after 20 h. The level of bacterial growth was initially lower in rewetted than in constantly moist soil, but started to increase linearly immediately upon rewetting 4-days dried soil. In 1-year dried soil, bacterial growth started only after a 16 h lag period of zero growth, and then increased exponentially to a peak after 30 h, at rates superseding those in continually moist soil. Fungal growth started to increase immediately upon rewetting, and reached the rate of the control soil after 2 days for the 4-days dried soil, and after a week for the 1-year dried soil. Thus, prolonged drying altered the pattern of bacterial and fungal growth after rewetting. Our results suggest that both fungal and bacterial growth are uncoupled from the initial respiration pulse and that growth responses and microbial C-use efficiency can be affected by prolonged drying. (C) 2013 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bacterial growth, C-use efficiency, Microbial growth efficiency, Drying-rewetting, Drought, Fungal growth, Respiration, Mineralization
in
Soil Biology & Biochemistry
volume
66
pages
188 - 192
publisher
Elsevier
external identifiers
  • wos:000325665400023
  • scopus:84882951653
ISSN
0038-0717
DOI
10.1016/j.soilbio.2013.07.014
project
Interaction between fungi and bacteria in soil
Responses of soil microbes to drought and rewetting
Effect of environmental factors on fungal and bacterial growth in soil
Microbial carbon-use efficiency
language
English
LU publication?
yes
id
8a7564e7-6d24-4836-a8f2-ff7996f34f02 (old id 4160384)
date added to LUP
2016-04-01 12:59:17
date last changed
2020-01-12 10:38:11
@article{8a7564e7-6d24-4836-a8f2-ff7996f34f02,
  abstract     = {A pulse of respiration is induced by rewetting dry soil. Here we study the microbial responses underlying this pulse of respiration when rewetting soil dried for 4-days or 1-year. In the 4-days dried soil, respiration increased to a maximum rate immediately upon rewetting after which it decreased exponentially. In the 1-year dried soil, respiration also increased immediately, but then remained high for 16 h, after which it increased further, exponentially, with a peak rate after 20 h. The level of bacterial growth was initially lower in rewetted than in constantly moist soil, but started to increase linearly immediately upon rewetting 4-days dried soil. In 1-year dried soil, bacterial growth started only after a 16 h lag period of zero growth, and then increased exponentially to a peak after 30 h, at rates superseding those in continually moist soil. Fungal growth started to increase immediately upon rewetting, and reached the rate of the control soil after 2 days for the 4-days dried soil, and after a week for the 1-year dried soil. Thus, prolonged drying altered the pattern of bacterial and fungal growth after rewetting. Our results suggest that both fungal and bacterial growth are uncoupled from the initial respiration pulse and that growth responses and microbial C-use efficiency can be affected by prolonged drying. (C) 2013 Elsevier Ltd. All rights reserved.},
  author       = {Meisner, Annelein and Bååth, Erland and Rousk, Johannes},
  issn         = {0038-0717},
  language     = {eng},
  pages        = {188--192},
  publisher    = {Elsevier},
  series       = {Soil Biology & Biochemistry},
  title        = {Microbial growth responses upon rewetting soil dried for four days or one year},
  url          = {http://dx.doi.org/10.1016/j.soilbio.2013.07.014},
  doi          = {10.1016/j.soilbio.2013.07.014},
  volume       = {66},
  year         = {2013},
}