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High viral infection rates in Antarctic and Arctic bacterioplankton
Umeå University, Faculty of Science and Technology, Ecology and Environmental Science.
2007 (English)In: Environmental Microbiology, Vol. 9, no 1, 250-255 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2007. Vol. 9, no 1, 250-255 p.
URN: urn:nbn:se:umu:diva-11884DOI: doi:10.1111/j.1462-2920.2006.01135.xOAI: diva2:151555
Available from: 2007-03-15 Created: 2007-03-15 Last updated: 2011-01-11Bibliographically approved

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Säwström, Christin
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Ecology and Environmental Science

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