Chen, F. University of Georgia,
Lu, J. University of Georgia,
Hodson, R. E. University of Georgia,

It is now known that viruses are numerically dominant in freshwater and marine microbial communities. Studies have been carried out to investigate the dynamics and distribution of viruses, and their relationship with bacterioplankton and chlorophyll a in many individual aquatic ecosystems. However, it is not clear how viruses and their hosts distribute along the coastal rivers with salinity gradients ranged from 0 to 33 . In this study, the abundance of cyanophages and cyanobacteria, total viruses and bacterioplankton in three Georgia coastal rivers (Savannah, Satilla and Altamaha rivers) was examined. The most probable number (MPN) of cyanophages which infect Synechococcus sp. WH7803 ranged from 6 x 104 to 4.4 x 107 l-1, and total virus abundance ranged from 0.15 to 5.23 x 1010 l-1 in the three coastal rivers. Distribution of cyanophages and total viruses along the three river transects followed a similar pattern. The highest concentrations of cyanophages and total viruses were at the stations with salinity greater than 10 , and the lowest concentrations occurred at the stations with salinity less than 1 . Cyanophage MPN and total virus concentration were significantly related to total bacterial counts, but not to unicellular cyanobacterial counts.
Day: Tuesday, Feb. 2
Time: Poster
Location: Sweeney Center
Code: SS40TU0553S