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Viral dynamics and patterns of lysogeny in Antarctic saline lakes


Laybourn-Parry, J and Marshall, WA and Madan, NJ, Viral dynamics and patterns of lysogeny in Antarctic saline lakes, Polar Biology, 30, (3) pp. 351-358. ISSN 0722-4060 (2007) [Refereed Article]

DOI: doi:10.1007/s00300-006-0191-9


Antarctic lakes are extreme ecosystems with microbially dominated food webs, in which viruses may be important in controlling community dynamics. A year long investigation of two Antarctic saline lakes (Ace and Pendant Lakes) revealed high concentrations of virus like particles (VLP) (0.20-1.26 × 108 ml-1), high VLP: bacteria ratios (maximum 70.6) and a seasonal pattern of lysogeny differing from that seen at lower latitudes. Highest rates of lysogeny (up to 32% in Pendant Lake and 71% in Ace Lake) occurred in winter and spring, with low or no lysogeny in summer. Rates of virus production (range 0.176-0.823 × 106 viruses ml-1 h-1) were comparable to lower latitude freshwater lakes. In Ace Lake VLP did not correlate with bacterial cell concentration or bacterial production but correlated positively with primary production, while in Pendant Lake VLP abundance correlated positively with both bacterial cell numbers and bacterial production but not with primary production. In terms of virus and bacterial dynamics the two saline Antarctic lakes studied appear distinct from other aquatic ecosystems investigated so far, in having very high viral to bacterial ratios (VBR) and a very high occurrence of lysogeny in winter. © 2006 Springer-Verlag.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Microbial ecology
Objective Division:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Biodiversity in Antarctic and Southern Ocean environments
UTAS Author:Laybourn-Parry, J (Professor Johanna Laybourn-Parry)
ID Code:48996
Year Published:2007
Web of Science® Times Cited:47
Deposited By:Research Division
Deposited On:2007-11-10
Last Modified:2010-06-04

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