Walter A. Glooschenko

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Research on aquatic ecosystems has shown the presence of diel (24 hour) variations of chlorophylla. In order to investigate this phenomenon in the Great Lakes, an IFYGL program was set up in which 8 cruises were made roughly monthly between April and October 1972. Two Lake Ontario Stations were chosen, one inshore near Oshawa, Ontario and the other(More)
Dividing and nondividing cell populations of Chaetoceros costatum Pavillard were placed in light; nondividing populations were also placed in the dark, and one population was killed by formalin. No difference in(203) Hg uptake was seen in nondividing cells in the light and dark, while cells accumulated about 2 times as much(203) Hg as living cells,(More)
Samples of water, seston, and sediment from the upper Great Lakes were collected during the summer of 1974 for analyses of polychlorinated biphenyls (PCS's), 15 organochlorine pesticides, and 17 organophosphorus pesticides. Samples were taken from 9 sites in Lake Huron, 2 in the North Channel, 5 in Georgian Bay, and 17 in Lake Superior. In the water samples(More)
A biomonitoring study was made of the atmospheric deposition of arsenic and selenium across northern Canada utilizing Sphagnum fuscum moss. Intensive sampling was carried out adjacent to the smelter at Rouyn-Noranda, Quebec. An average background concentration of arsenic in the moss of 0.66 mg kg-1 was determined, while most selenium concentrations were(More)
Water samples were collected from Lake Jackson, near Tallahassee, Florida, and enriched with N, P, N + P, and Si in the laboratory in April, 1969 and January, 1970. After time intervals of 3 and 6 days in April, and 13 days additionally in January, phytoplanktonic algae in the cultures were enumerated as to species composition and cell numbers with an(More)
The effects of p, p′-DDT were determined on photosynthesis and chlorophyll a content in the marine diatom Nitzschia delicatissima Cleve at four light intensities. A consistent reduction in carbon fixation and chlorophyll a per cell over controls in a 24-hour period was observed with increasing DDT concentration between 9.4 ppb and 1000 ppb. The maximum(More)
The Attawapiskat River is one of the major rivers entering James Bay, Canada. Wetlands of the lower 12 km portion of the river were studied between the Cree Indian village of Attawapiskat and James Bay. This portion contains both freshwater, freshwater tidal and brackish/saline wetlands along a gradient downstream to the river mouth. Due to the high flow of(More)