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Investigating the long-term legacy of drought and warming on the soil microbial community across five European shrubland ecosystems.

Rousk, Johannes LU ; Smith, Andrew R and Jones, Davey L (2013) In Global Change Biology 19(12). p.3872-3884
Abstract
We investigated how the legacy of warming and summer-drought affected microbial communities in five different replicated long-term (>10 years) field-experiments across Europe (EU-FP7 INCREASE infrastructure). To focus explicitly on legacy effects (i.e. indirect rather than direct effects of the environmental factors), we measured microbial variables under the same moisture and temperature in a brief screening, and following a pre-incubation at stable conditions. Specifically, we investigated the size and composition of the soil microbial community (PLFA) alongside measurements of bacterial (leucine incorporation) and fungal (acetate in ergosterol incorporation) growth rates, previously shown to be highly responsive to changes in... (More)
We investigated how the legacy of warming and summer-drought affected microbial communities in five different replicated long-term (>10 years) field-experiments across Europe (EU-FP7 INCREASE infrastructure). To focus explicitly on legacy effects (i.e. indirect rather than direct effects of the environmental factors), we measured microbial variables under the same moisture and temperature in a brief screening, and following a pre-incubation at stable conditions. Specifically, we investigated the size and composition of the soil microbial community (PLFA) alongside measurements of bacterial (leucine incorporation) and fungal (acetate in ergosterol incorporation) growth rates, previously shown to be highly responsive to changes in environmental factors, and microbial respiration. We found no legacy effects on the microbial community size, composition, growth rates or basal respiration rates at the effect sizes used in our experimental setup (0.6°C, about 30% precipitation reduction). Our findings support previous reports from single short-term ecosystem studies thereby providing a clear evidence base to allow long term, broad scale generalizations to be made. The implication of our study is that warming and summer drought will not result in legacy effects on the microbial community and their processes within the effect sizes here studied. While legacy effects on microbial processes during perturbation cycles, such as drying-rewetting, and on tolerance to drought and warming remains to be studied, our results suggest that any effects on overall ecosystem processes will be rather limited. Thus, the legacies of warming and drought should not be prioritised factors to consider when modelling contemporary rates of biogeochemical processes in soil. This article is protected by copyright. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
global climate change, carbon sequestration, soil C cycle, decomposition, mineralisation, ecosystem service, warming adaptation, temperature acclimation.
in
Global Change Biology
volume
19
issue
12
pages
3872 - 3884
publisher
Wiley-Blackwell
external identifiers
  • wos:000326836000026
  • pmid:23897832
  • scopus:84887492973
  • pmid:23897832
ISSN
1354-1013
DOI
10.1111/gcb.12338
project
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
45700a23-8a69-4136-b5b8-cbb3d40ea1d0 (old id 3955458)
date added to LUP
2016-04-01 11:13:22
date last changed
2020-02-23 04:24:36
@article{45700a23-8a69-4136-b5b8-cbb3d40ea1d0,
  abstract     = {We investigated how the legacy of warming and summer-drought affected microbial communities in five different replicated long-term (>10 years) field-experiments across Europe (EU-FP7 INCREASE infrastructure). To focus explicitly on legacy effects (i.e. indirect rather than direct effects of the environmental factors), we measured microbial variables under the same moisture and temperature in a brief screening, and following a pre-incubation at stable conditions. Specifically, we investigated the size and composition of the soil microbial community (PLFA) alongside measurements of bacterial (leucine incorporation) and fungal (acetate in ergosterol incorporation) growth rates, previously shown to be highly responsive to changes in environmental factors, and microbial respiration. We found no legacy effects on the microbial community size, composition, growth rates or basal respiration rates at the effect sizes used in our experimental setup (0.6°C, about 30% precipitation reduction). Our findings support previous reports from single short-term ecosystem studies thereby providing a clear evidence base to allow long term, broad scale generalizations to be made. The implication of our study is that warming and summer drought will not result in legacy effects on the microbial community and their processes within the effect sizes here studied. While legacy effects on microbial processes during perturbation cycles, such as drying-rewetting, and on tolerance to drought and warming remains to be studied, our results suggest that any effects on overall ecosystem processes will be rather limited. Thus, the legacies of warming and drought should not be prioritised factors to consider when modelling contemporary rates of biogeochemical processes in soil. This article is protected by copyright. All rights reserved.},
  author       = {Rousk, Johannes and Smith, Andrew R and Jones, Davey L},
  issn         = {1354-1013},
  language     = {eng},
  number       = {12},
  pages        = {3872--3884},
  publisher    = {Wiley-Blackwell},
  series       = {Global Change Biology},
  title        = {Investigating the long-term legacy of drought and warming on the soil microbial community across five European shrubland ecosystems.},
  url          = {http://dx.doi.org/10.1111/gcb.12338},
  doi          = {10.1111/gcb.12338},
  volume       = {19},
  year         = {2013},
}