Reservoir Plankton Communities 
89 
Fig. 1. Map of Sutton Reservoir, New Hanover County, N.C., showing 
sampling stations and baffle dikes. 
( Tilapia zilli) in 1980 subsequently controlled the bladderwort (CP&L 
1984b). In 1982 dense growths of pondweed ( Potamageton berchtoldii), 
southern naiad ( Najas guadalupensis ), and coontail ( Ceratophyllum 
demersum) supplanted the bladderwort and were not effectively 
controlled by the tilapia. A dense blue-green algal bloom occurred 
during the summer of that year as well (CP&L 1984a). The macrophytes 
were controlled and nearly eliminated by the use of herbicides in 
subsequent years (Schiller 1985). Increased densities of blue-green algae 
still occur during summer, but nuisance blooms have not occurred since 
the macrophytes were eliminated in 1983. 
