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Reduced diversity and changed bacterioplankton community composition do not affect utilization of dissolved organic matter in the Adriatic Sea

Sjöstedt, Johanna LU ; Pontarp, Mikael LU ; Tinta, Tinkara; Alfredsson, Hanna; Turk, Valentina; Lundberg, Per LU ; Hagstrom, Ake and Riemann, Lasse (2013) In Aquatic Microbial Ecology 71(1). p.15-132
Abstract
To obtain insights into the coupling between community composition, diversity and community function, bacterioplankton assemblages from the Gulf of Trieste (Northern Adriatic Sea) were exposed to increasing environmental stress throughout 2 wk in continuous seawater cultures to construct communities differing in composition and diversity. The assemblages were exposed to (1) decreased temperature, (2) decreased temperature and phosphate addition or (3) decreased temperature, phosphate addition and lowered oxygen level. Bacterial and viral abundances as well as bacterial community composition stabilized during the second week of the experiment. Denaturing gradient gel electrophoresis and pyrosequencing of 16S rRNA genes showed dramatic... (More)
To obtain insights into the coupling between community composition, diversity and community function, bacterioplankton assemblages from the Gulf of Trieste (Northern Adriatic Sea) were exposed to increasing environmental stress throughout 2 wk in continuous seawater cultures to construct communities differing in composition and diversity. The assemblages were exposed to (1) decreased temperature, (2) decreased temperature and phosphate addition or (3) decreased temperature, phosphate addition and lowered oxygen level. Bacterial and viral abundances as well as bacterial community composition stabilized during the second week of the experiment. Denaturing gradient gel electrophoresis and pyrosequencing of 16S rRNA genes showed dramatic reductions in bacterial diversity in all treatments and major compositional differences relative to the inoculum. Nevertheless, no differences in the ability to exploit dissolved organic carbon (DOC) were found for the acquired communities relative to the inoculum, indicating that the bacterial communities were functionally redundant. We speculate that oscillations in exploitation of the DOC pool in situ are mainly governed by factors limiting the overall bacterial growth, rather than perturbations affecting only subsets of the microbial biota. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Diversity, Functional redundancy, Community structure, Continuous, cultures, DOC
in
Aquatic Microbial Ecology
volume
71
issue
1
pages
15 - 132
publisher
Inter-Research
external identifiers
  • wos:000327552900002
  • scopus:84889049698
ISSN
0948-3055
DOI
10.3354/ame01660
language
English
LU publication?
yes
id
0e213b76-e5c4-4781-b594-4446e9ad7fda (old id 4275324)
date added to LUP
2014-01-28 11:07:03
date last changed
2019-02-20 04:56:55
@article{0e213b76-e5c4-4781-b594-4446e9ad7fda,
  abstract     = {To obtain insights into the coupling between community composition, diversity and community function, bacterioplankton assemblages from the Gulf of Trieste (Northern Adriatic Sea) were exposed to increasing environmental stress throughout 2 wk in continuous seawater cultures to construct communities differing in composition and diversity. The assemblages were exposed to (1) decreased temperature, (2) decreased temperature and phosphate addition or (3) decreased temperature, phosphate addition and lowered oxygen level. Bacterial and viral abundances as well as bacterial community composition stabilized during the second week of the experiment. Denaturing gradient gel electrophoresis and pyrosequencing of 16S rRNA genes showed dramatic reductions in bacterial diversity in all treatments and major compositional differences relative to the inoculum. Nevertheless, no differences in the ability to exploit dissolved organic carbon (DOC) were found for the acquired communities relative to the inoculum, indicating that the bacterial communities were functionally redundant. We speculate that oscillations in exploitation of the DOC pool in situ are mainly governed by factors limiting the overall bacterial growth, rather than perturbations affecting only subsets of the microbial biota.},
  author       = {Sjöstedt, Johanna and Pontarp, Mikael and Tinta, Tinkara and Alfredsson, Hanna and Turk, Valentina and Lundberg, Per and Hagstrom, Ake and Riemann, Lasse},
  issn         = {0948-3055},
  keyword      = {Diversity,Functional redundancy,Community structure,Continuous,cultures,DOC},
  language     = {eng},
  number       = {1},
  pages        = {15--132},
  publisher    = {Inter-Research},
  series       = {Aquatic Microbial Ecology},
  title        = {Reduced diversity and changed bacterioplankton community composition do not affect utilization of dissolved organic matter in the Adriatic Sea},
  url          = {http://dx.doi.org/10.3354/ame01660},
  volume       = {71},
  year         = {2013},
}