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High viral infection rates in Antarctic and Arctic bacterioplankton


Sawstrom, C and Graneli, W and Laybourn-Parry, J and Anesio, AM, High viral infection rates in Antarctic and Arctic bacterioplankton, Environmental Microbiology, 9, (1) pp. 250-255. ISSN 1462-2912 (2007) [Refereed Article]

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DOI: doi:10.1111/j.1462-2920.2006.01135.x


The frequency of visibly phage-infected bacterial cells (FVIB) and the average number of phages per cell [i.e. burst size (BS)] were determined in Antarctic and Arctic ultra-oligotrophic freshwater environments. Water samples were collected from two Antarctic freshwater lakes and cryoconite holes from a glacier in the Arctic. Data from this bipolar study show the highest FVIB (average 26.1%, range 5.1% to 66.7%) and the lowest BS (average 4, range 2–15) ever reported in the literature. The bacterial density is low in these ultra-oligotrophic freshwater environments but a large proportion of the bacteria are visibly infected. Our results suggest that a constant virioplankton population can be maintained in these extreme environments even though host density is low and often slow growing.

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:52793
Year Published:2007
Web of Science® Times Cited:49
Deposited By:Research Division
Deposited On:2008-08-01
Last Modified:2012-04-30

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