Fig. 8. Relationship between the bioluminescent ratio and salinity of bacterial communities at five estuarine sites in Chatham County (Georgia, USA), and from 64 km offshore in the South Atlantic Bight. Savannah River at downtown Savannah (•), Little Ogechee River at Fort McAllister (), Skidaway River estuary at Skidaway Institute of Oceanography main dock (), Isle of Hope Marina (), Tybee Island south beach (), South Atlantic Bight approximately 64 km east of the Savannah Sea Buoy (). Error bars represent one standard deviation of the mean.