Zooplankton impacts on chlorophyll and transparency in Onondaga Lake, New York, USA

Assessing the trophic state of Linhos lake: a first step towards ecological rehabilitation

“…This could be explained by lower levels of dissolved oxygen and also by the high densities of Ceratium sp., which were recorded in zooplankton samples from August to September. This large edible species could not be eaten by small cladocerans, such as Bosmina (Auer et al, 1990).…”

“…Generally, this process results in a zooplankton community dominated by rotifers and small bodied cladocerans (Gliwicz, 1990;Matsubara, 1993;Ejsmont-Karabin, 1995) which are less vulnerable to feeding interference by large inedible algae species (Gliwicz, 1990;Auer et al, 1990) and capable of feeding on detritus and bacterial size particles (Bogdan and Gilbert, 1982). The aim of the present study was to develop the first set of measures for the ecological rehabilitation of Linhos lake.…”

Supply of phosphorus to the water column of a productive hardwater lake: controlling mechanisms and management considerations

“…High productivity is a major water quality problem of Onondaga Lake (Auer et al, 1990). A number of costly measures have been taken to remediate this problem.…”

Changes in Primary Production in Onondaga Lake, NY: Magnitude, Metrics, and Drivers

“…Increasing inputs of domestic and industrial waste accompanied development of the region that led to severe degradation and loss of uses, including the cold-water fishery. Important features of the degradation were water quality manifestations of extreme cultural eutrophication, which have included: (1) high levels of phytoplankton biomass, including the occurrence of severe blooms of nuisance forms (Auer et al 1990, Effler 1996, (2) low SD values (Field 1980, Perkins andEffler 1996), (3) rapid loss of DO from the hypolimnion (Matthews and Effler 2004), (4) subsequent accumulations of reduced by-products of anaerobic metabolism (Effler et al 1988, Addess andEffler 1996), and (5) severe depletion of DO in the upper waters during fall mixing associated with oxidation of these constituents (Effler et al 1996a, Gelda and.…”

“…2c) that attended closure of the industry. This is primarily a result of the shift to increased top-down pressure on the phytoplankton community from the return of the salinity intolerant native large-bodied Daphnia (Auer et al 1990, Siegfried et al 1996, Hairston et al 2004. Before closure of the soda ash facility Chl e generally remained high (e.g., > 30 µg/L) and SD low (e.g., < 1.2 m) throughout the productive spring to fall interval of most years in the -1985interval (e.g., Field 1980, Effler 1996.…”