Accession Number : ADA304542

Title :   Establishing Native Submersed Aquatic Plant Communities in Southern Reservoirs.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB

Personal Author(s) : Smart, R. M. ; Doyle, Robert D. ; Madsen, John D. ; Dick, Gary O.

PDF Url : ADA304542

Report Date : JAN 1996

Pagination or Media Count : 47

Abstract : Some reservoirs appear to remain turbid and unvegetated for many years, while others develop extensive macrophyte communities and are much clearer. In fact, ecological theory has long recognized the possibility that ecosystems may have multiple stable equilibria that might diverge drastically from each other (May 1977). Aquatic environments with intermediate nutrient inputs appear to have two stable equilibrium states: a clear state characterized by transparent water and an abundance of aquatic macrophytes, and an alternative turbid state characterized by high turbidity (plankton and resuspended sediments) and a virtual absence of aquatic macrophytes (Scheffer 1990; Scheffer et al. 1993). While some species of submersed aquatic plants cause serious management problems, most species contribute significantly to the aquatic environment by stabilizing the sediments and improving water clarity (Carpenter and Lodge 1986), taking up nutrients from the water (Kufel and Ozimek 1994) and providing quality habitat for fish (Engel 1985; French 1988; Killgore, Morgan, and Rybicki 1989). In addition, some native species are highly competitive and may offer protection from invasion by nuisance exotic species (McCreary, McFarland, and Barko 1991; Smart, Barko, and McFarland 1994).

Descriptors :   *WATER, *NUTRIENTS, *HABITATS, *RESERVOIRS, *PLANKTON, *AQUATIC PLANTS, ENVIRONMENTS, MANAGEMENT, THEORY, TRANSPARENCE, QUALITY, VISIBILITY, ECOSYSTEMS, SEDIMENTS, SOUTH(DIRECTION), ECOLOGY, TURBIDITY.

Subject Categories : Biology
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE