Rapid Recovery of Marine Bacterioplankton Activity after Inhibition by UV Radiation in Coastal Waters.

Applied and Environmental Microbiology
E Kaiser, Gerhard J Herndl

Abstract

Laboratory and in situ experiments were performed in order to evaluate the role of UV radiation on bacterial activity. Particular attention was given to the determination of the role of UV-A and photosynthetic active radiation (PAR) and different nutrient conditions on the recovery of bacterial activity. Laboratory experiments with nearly natural radiation intensities indicated a 20 to 40% reduction from the initial level of bacterial activity after UV-B exposure for 2 to 4 h. Bacterial activity in freshly collected seawater showed a more pronounced inhibition and faster recovery than bacterial activity in aged, nutrient-depleted seawater. The results of in situ experiments with filtered water (0.8-(mu)m-pore-size filter) and natural surface solar radiation levels agreed with those of the laboratory experiments and revealed that UV-A and PAR are important for the recovery of bacterial activity and result in levels of bacterial activity that are higher than those prior to exposure to full solar radiation. Bacterioplankton exposed to full solar radiation for 3 h and subsequently incubated at different depths within the upper mixed water column showed an increase in bacterial activity with increased depth; the highest bacterial ac...Continue Reading

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Citations

Feb 7, 2001·Applied and Environmental Microbiology·C WinterG J Herndl
Aug 27, 2009·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Sabine Matallana-SurgetFabien Joux
Nov 19, 2011·FEMS Microbiology Ecology·Clara Ruiz-GonzálezJosep M Gasol
Sep 6, 2014·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Donat-P HäderE Walter Helbling
Jan 30, 2015·Global Change Biology·Sébastien MoreauGustavo A Ferreyra
Apr 15, 2006·Photochemistry and Photobiology·Marc Tedetti, Richard Sempéré
Sep 3, 1999·Applied and Environmental Microbiology·F JouxD L Mitchell
Jun 8, 2004·Environmental Science & Technology·Foday M JawardKevin C Jones

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