Low salinity and high-level UV-B radiation reduce single-cell activity in antarctic sea ice bacteria.
Experiments simulating the sea ice cycle were conducted by exposing microbes from Antarctic fast ice to saline and irradiance regimens associated with the freeze-thaw process. In contrast to hypersaline conditions (ice formation), the simulated release of bacteria into hyposaline seawater combined with rapid exposure to increased UV-B radiation significantly reduced metabolic activity.
Martin
Andrew
A
Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Hobart, TAS, Australia. Andrew.Martin@utas.edu.au
Hall
Julie
J
Ryan
Ken
K
D000864:Antarctic Regions; D001419:Bacteria / Q000187:drug effects / Q000378:metabolism* / Q000528:radiation effects; D046448:Ice Cover / Q000382:microbiology*; D007930:Leucine / Q000378:metabolism; D054712:Salinity; D014466:Ultraviolet Rays
D007930:Leucine