Open AccessLow Salinity and High-Level UV-B Radiation Reduce Single-Cell Activity in Antarctic Sea Ice Bacteria
Author(s) -
Andrew Martin,
Julie Hall,
Ken G. Ryan
Publication year - 2009
Publication title -
applied and environmental microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.552
H-Index - 324
eISSN - 1070-6291
pISSN - 0099-2240
DOI - 10.1128/aem.00829-09
Subject(s) - seawater , salinity , sea ice , bacteria , irradiance , environmental science , oceanography , radiation , atmospheric sciences , ice formation , environmental chemistry , chemistry , biology , geology , physics , optics , genetics
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.