Abstract
Inland water environments cover about 2.5 percent of our planet and harbor huge numbers of known and still unknown microorganisms. In this report, we examined water samples for the abundance, prevalence, and genetic diversity of a group of infectious viruses (chloroviruses) that infect symbiotic chlorella-like green algae. Samples were collected on a weekly basis for a period of 24 to 36 months from a recreational freshwater lake in Lincoln, Nebraska, and assayed for infectious viruses by plaque assay. The numbers of infectious virus particles were both host- and site-dependent. The consistent fluctuations in numbers of viruses suggest their impact as key factors in shaping microbial community structures in the water surface. Even in low-viral-abundance months, infectious chlorovirus populations were maintained, suggesting either that the viruses are very stable or that there is ongoing viral production in natural hosts.
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Acknowledgments
Funding for this work was partially provided by the National Science Foundation-Experimental Program to Stimulate Competitive Research—Grant EPS-1004094 (JVE), Stanley Medical Research Institute—Grant 11R-0001 (JVE and DDD), and the Centers of Biomedical Research Excellence program of the National Center for Research Resources—Grant P20-RR15535 (JVE). OS and GW were supported by University of Nebraska Undergraduate Creative Activity and Research Experience and Agricultural Research Division scholarships. CM was supported by two summer fellowships from the Nebraska Center for Virology. We acknowledge Jim Gurnon for technical assistance. We thank Mike Archer at the Nebraska Department of Environmental Quality for providing the 2010 water analysis data.
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705_2016_2853_MOESM1_ESM.tif
Supplementary material 1 (TIFF 33070 kb) Supplementary Fig. S1 Plot representing the seasonal dynamics of chlorovirus populations over a 3-year period at site 1 and over a 2-year period at site 2 in Holmes Lake. Symbols represent the average values of plaque-forming units/ml (PFU/ml) for every week over each year. The x-axis indicates months, and the y-axis indicates PFU/ml of indigenous water. Each panel represents relative abundance for NC64A (A, B), Syngen (C, D) and SAG viruses (E, F) from each corresponding week and location
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Quispe, C.F., Sonderman, O., Seng, A. et al. Three-year survey of abundance, prevalence and genetic diversity of chlorovirus populations in a small urban lake. Arch Virol 161, 1839–1847 (2016). https://doi.org/10.1007/s00705-016-2853-4
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DOI: https://doi.org/10.1007/s00705-016-2853-4