title: Reduction of germination frequency in Anabaena akinetes by sediment drying: a possible method by which to inhibit bloom formation.
abstract: The effect of desiccation on germination frequency of Anabaena akinetes was investigated to evaluate the practical usefulness of sediment drying in reservoirs as a measure of inhibition of Anabaena bloom formation. Sediment samples taken from a small reservoir, where an abundance of Anabaena blooms occur every summer were desiccated in the outdoors and in an incubator at 5, 10, 15, and 25 degrees C. As a result, the germination frequency of Anabaena akinetes was strongly inhibited in comparison with that of Anabaena akinetes preserved in a refrigerator without desiccation as a control. Greater inhibition of Anabaena germination found at a higher temperature was examined, and almost all akinetes lost the ability of germination at 25 degrees C after 3 days of the desiccation treatment. Therefore, sediment drying is considered to be a useful measure to reduce periods and scales of Anabaena blooms, and its effect will be enhanced by performance during the warmer seasons.
authors.affiliation: Lake Biwa Research Institute, 1-10 Uchidehama, Otsu 520-0806, Japan. tsujim@lbri.go.jp
authors.forename: Shigeo
authors.initials: S
authors.lastname: Tsujimura
mesh_terms: D017033:Anabaena / Q000254:growth & development*; D005068:Eutrophication; D019015:Geologic Sediments / Q000382:microbiology*; D007700:Kinetics; D012621:Seasons; D013696:Temperature; D014867:Water; D014881:Water Supply
chemical_list: D014867:Water