Affiliation:
1. School of Biosciences, The University of Nottingham, Nottingham NG7 2RD, United Kingdom
2. Department of Limnology, Lund University, Lund S-223 62, Sweden
Abstract
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.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Reference41 articles.
1. High abundance of viruses found in aquatic environments
2. A Comparison of Methods for Counting Viruses in Aquatic Systems
3. Viruses as Partners in Spring Bloom Microbial Trophodynamics
4. Chen, F., J. R. Lu, B. J. Binder, Y. C. Liu, and R. E. Hodson. 1992. Application of digital image analysis and flow cytometry to enumerate marine viruses stained with SYBR Gold. Appl. Environ. Microbiol.67:539-545.
5. Cochlan, W. P., J. Wikner, G. F. Steward, D. C. Smith, and F. Azam. 1993. Spatial distribution of viruses, bacteria, and chlorophyll a in neritic, oceanic and estuarine environments. Mar. Ecol. Prog. Ser.92:77-87.
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