title: Instability in a small hypereutrophic urban lake.
abstract: Two summer intensive monitoring programs were conducted on a small Louisiana urban lake following restoration. Monitoring objectives were directed towards providing high resolution data needed to examine lake temporal and spatial variability. During the first year of post-restoration (1983), anaerobic conditions developed in the lake and a major fish kill (Ictalurus sp.) was observed. Total phosphorus concentrations at stations nearest the lake bottom were exceedingly high (>0.400 mg L(-1)), suggesting the source of phosphorus was sediment release. Monitoring conducted in 1984 indicated the re-establishment of high benthic demand and internal nutrient recycling patterns. Mean phosphorus levels increased by more than 50% over the observed 1983 values, while dissolved oxygen concentrations demonstrated gradients from surface to bottom and were consistently below 2.0 mg L(-1) in the bottom waters.
authors.affiliation: Department of Civil Engineering, Louisiana State University, 70803, Baton Rouge, LA, USA.
authors.forename: D G
authors.initials: DG
authors.lastname: Burden
authors.forename: R F
authors.initials: RF
authors.lastname: Malone
authors.forename: P
authors.initials: P
authors.lastname: Gremillion