title: Thresholds in eutrophication of natural waters.
abstract: The population density of bacterioplankton and the concentration of dissolved organic carbon combined is a useful indicator to monitor subtle variations in the amount of eutrophication. Both parameters can be measured precisely and readily by widely accepted routine techniques that require little skill. Thresholds of eutrophication can be established to maintain the 'Health of Natural Waters' using this indicator.
authors.affiliation: Institute of Biological Sciences, University of Tsukuba, 305, Sakuramura, Ibaraki, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Seki