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Repeated disturbances affect functional but not compositional resistance and resilience in an aquatic bacterioplankton community

Sjöstedt, Johanna LU ; Langenheder, Silke; Kritzberg, Emma LU ; Karlsson, Christofer M G and Lindström, Eva S (2018) In Environmental microbiology reports 10(4). p.493-500
Abstract

Disturbances are believed to be one of the main factors influencing variations in community diversity and functioning. Here we investigated if exposure to a pH press disturbance affected the composition and functional performance of a bacterial community and its resistance, recovery and resilience to a second press disturbance (salt addition). Lake bacterial assemblages were initially exposed to reduced pH in six mesocosms whereas another six mesocosms were kept as reference. Seven days after the pH disturbance, three tanks from each treatment were exposed to a salt disturbance. Both bacterial production and enzyme activity were negatively affected by the salt treatment, regardless if the communities had been subject to a previous... (More)

Disturbances are believed to be one of the main factors influencing variations in community diversity and functioning. Here we investigated if exposure to a pH press disturbance affected the composition and functional performance of a bacterial community and its resistance, recovery and resilience to a second press disturbance (salt addition). Lake bacterial assemblages were initially exposed to reduced pH in six mesocosms whereas another six mesocosms were kept as reference. Seven days after the pH disturbance, three tanks from each treatment were exposed to a salt disturbance. Both bacterial production and enzyme activity were negatively affected by the salt treatment, regardless if the communities had been subject to a previous disturbance or not. However, cell-specific enzyme activity had a higher resistance in communities pre-exposed to the pH disturbance compared to the reference treatment. In contrast, for cell-specific bacterial production resistance was not affected, but recovery was faster in the communities that had previously been exposed to the pH disturbance. Over time, bacterial community composition diverged among treatments, in response to both pH and salinity. The difference in functional recovery, resilience and resistance may depend on differences in community composition caused by the pH disturbance, niche breadth or acquired stress resistance.

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author
organization
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Contribution to journal
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published
subject
keywords
Bacteria/classification, Bacterial Physiological Phenomena, Carbon/metabolism, Cellulose 1,4-beta-Cellobiosidase/metabolism, Hydrogen-Ion Concentration, Lakes/microbiology, Plankton/classification, RNA, Ribosomal, 16S/genetics, Salinity, Stress, Physiological/physiology, Water Microbiology, beta-Glucosidase/metabolism
in
Environmental microbiology reports
volume
10
issue
4
pages
493 - 500
publisher
Wiley-Blackwell
external identifiers
  • scopus:85050464256
ISSN
1758-2229
DOI
10.1111/1758-2229.12656
language
English
LU publication?
yes
id
f389fbe5-f4e5-4430-bee4-df2fdd71d2d3
date added to LUP
2019-05-15 14:40:39
date last changed
2019-10-15 07:04:26
@article{f389fbe5-f4e5-4430-bee4-df2fdd71d2d3,
  abstract     = {<p>Disturbances are believed to be one of the main factors influencing variations in community diversity and functioning. Here we investigated if exposure to a pH press disturbance affected the composition and functional performance of a bacterial community and its resistance, recovery and resilience to a second press disturbance (salt addition). Lake bacterial assemblages were initially exposed to reduced pH in six mesocosms whereas another six mesocosms were kept as reference. Seven days after the pH disturbance, three tanks from each treatment were exposed to a salt disturbance. Both bacterial production and enzyme activity were negatively affected by the salt treatment, regardless if the communities had been subject to a previous disturbance or not. However, cell-specific enzyme activity had a higher resistance in communities pre-exposed to the pH disturbance compared to the reference treatment. In contrast, for cell-specific bacterial production resistance was not affected, but recovery was faster in the communities that had previously been exposed to the pH disturbance. Over time, bacterial community composition diverged among treatments, in response to both pH and salinity. The difference in functional recovery, resilience and resistance may depend on differences in community composition caused by the pH disturbance, niche breadth or acquired stress resistance.</p>},
  author       = {Sjöstedt, Johanna and Langenheder, Silke and Kritzberg, Emma and Karlsson, Christofer M G and Lindström, Eva S},
  issn         = {1758-2229},
  keyword      = {Bacteria/classification,Bacterial Physiological Phenomena,Carbon/metabolism,Cellulose 1,4-beta-Cellobiosidase/metabolism,Hydrogen-Ion Concentration,Lakes/microbiology,Plankton/classification,RNA, Ribosomal, 16S/genetics,Salinity,Stress, Physiological/physiology,Water Microbiology,beta-Glucosidase/metabolism},
  language     = {eng},
  month        = {05},
  number       = {4},
  pages        = {493--500},
  publisher    = {Wiley-Blackwell},
  series       = {Environmental microbiology reports},
  title        = {Repeated disturbances affect functional but not compositional resistance and resilience in an aquatic bacterioplankton community},
  url          = {http://dx.doi.org/10.1111/1758-2229.12656},
  volume       = {10},
  year         = {2018},
}