Effects of water levels on ecosystems: Bibliography Wlosinski, J. H., and E. R. Koljord. 1996. Effects of water levels on ecosystems: An annotated bibliography. U.S. Geological Survey, Environmental Management Technical Center, Onalaska, Wisconsin, December 1996. LTRMP 96-T007. 261 pp. (NTIS #PB97-134795) ABSTRACT This report contains annotations from more than 800 papers and reports describing the effects of water levels on ecosystem components, primarily in fresh waters. An index containing key words is included to facilitate the location of references on certain subjects. Key words are also grouped into general categories. The work was performed as part of the Upper Mississippi River System Long Term Resource Monitoring Program. KEYWORDS drawdown, ecosystem, ecosystem change, water level, water level effects, water level management