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Influence of humic substances on bacterial and viral dynamics in freshwaters

Anesio, Alexandre Magno LU ; Hollas, C; Granéli, Wilhelm LU and Laybourn-Parry, J (2004) In Applied and Environmental Microbiology 70(8). p.4848-4854
Abstract
Bacterial and viral abundances were measured in 24 lakes with dissolved organic carbon (DOC) concentrations ranging from 3 to 19 mg of C liter(-1). In addition, a laboratory experiment was performed to test the effects of different sources of carbon (i.e., glucose and fulvic acids) and nutrients on the dynamics of viruses and bacteria. In the lake survey, no correlation was found between virus abundance and DOC concentration, yet there was a significant positive correlation between bacterial abundance and DOC concentration. A negative correlation was found between the virus-to-bacteria ratio and DOC level. These results are in agreement with our findings in the laboratory, where virus counts were significantly lower in treatments with... (More)
Bacterial and viral abundances were measured in 24 lakes with dissolved organic carbon (DOC) concentrations ranging from 3 to 19 mg of C liter(-1). In addition, a laboratory experiment was performed to test the effects of different sources of carbon (i.e., glucose and fulvic acids) and nutrients on the dynamics of viruses and bacteria. In the lake survey, no correlation was found between virus abundance and DOC concentration, yet there was a significant positive correlation between bacterial abundance and DOC concentration. A negative correlation was found between the virus-to-bacteria ratio and DOC level. These results are in agreement with our findings in the laboratory, where virus counts were significantly lower in treatments with fulvic acid additions than in a control (mean, 67.4% +/- 6.5% of the control). Virus counts did not differ significantly among the control and treatments with glucose, indicating that it was the type of organic carbon and not quantity which had an impact on viruses. Results from this study suggest that the way viruses control bacterial assemblages in humic lakes is different from the mechanism in clear water systems. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied and Environmental Microbiology
volume
70
issue
8
pages
4848 - 4854
publisher
American Society for Microbiology
external identifiers
  • wos:000223290100057
  • pmid:15294823
  • scopus:4143071680
ISSN
0099-2240
DOI
10.1128/AEM.70.8.4848-4854.2004
language
English
LU publication?
yes
id
0ef391e5-aec5-4bfc-9f8d-14dac41c9306 (old id 136643)
date added to LUP
2007-06-28 12:06:07
date last changed
2017-01-01 05:19:18
@article{0ef391e5-aec5-4bfc-9f8d-14dac41c9306,
  abstract     = {Bacterial and viral abundances were measured in 24 lakes with dissolved organic carbon (DOC) concentrations ranging from 3 to 19 mg of C liter(-1). In addition, a laboratory experiment was performed to test the effects of different sources of carbon (i.e., glucose and fulvic acids) and nutrients on the dynamics of viruses and bacteria. In the lake survey, no correlation was found between virus abundance and DOC concentration, yet there was a significant positive correlation between bacterial abundance and DOC concentration. A negative correlation was found between the virus-to-bacteria ratio and DOC level. These results are in agreement with our findings in the laboratory, where virus counts were significantly lower in treatments with fulvic acid additions than in a control (mean, 67.4% +/- 6.5% of the control). Virus counts did not differ significantly among the control and treatments with glucose, indicating that it was the type of organic carbon and not quantity which had an impact on viruses. Results from this study suggest that the way viruses control bacterial assemblages in humic lakes is different from the mechanism in clear water systems.},
  author       = {Anesio, Alexandre Magno and Hollas, C and Granéli, Wilhelm and Laybourn-Parry, J},
  issn         = {0099-2240},
  language     = {eng},
  number       = {8},
  pages        = {4848--4854},
  publisher    = {American Society for Microbiology},
  series       = {Applied and Environmental Microbiology},
  title        = {Influence of humic substances on bacterial and viral dynamics in freshwaters},
  url          = {http://dx.doi.org/10.1128/AEM.70.8.4848-4854.2004},
  volume       = {70},
  year         = {2004},
}