Showing papers in "Journal of Great Lakes Research in 1992"

TL;DR: The research implies that a wetland must maintain a connection with a Great Lake to promote and enhance efficient fish utilization of the high productivity of marshes; that additional resilience is provided to species which spawn in wetlands since they can produce two cohorts and that fluctuating water levels are important in sustaining habitat diversity and productivity.

TL;DR: In this article, a major reduction of 38 years was found in the residence time for Lake Michigan (62 years as compared with the 100 year value previously reported) due to the consideration of flow exchange between Lakes Michigan and Huron, indicating that Lake Michigan may respond much faster to reductions in contaminant loadings than previously expected.

TL;DR: Waterfowl use of the Great Lakes has declined dramatically from presettlement times; the obvious cause is human encroachment on coastal wetlands and destruction of river delta and embayed wetland complexes.

TL;DR: These rearing experiments indicated that few, if any, of the observed C. anthracinus menta deformities were passed on to the next generation.

TL;DR: Coastal wetlands of Lake Erie fall into three categories, depending on the type of protection available to the wetland vegetation: (1) coastal lagoons behind barrier beaches, (2) managed marshes protected by earthern and rip-rap dikes, and (3) estuarine tributary mouths.

TL;DR: Growth rates, cohort development patterns, reproductive patterns, and production of the population at a deep water station over a 4-year period are determined.

TL;DR: In this paper, the authors reviewed the literature on PCBs and DDT in the Great Lakes ecosystem, in an attempt to explain between-basin and between-species variation in fish contamination.

TL;DR: The regulatory influences of wetlands to nutrient loading and as a source of DOM increase in the lower Great Lakes but are relatively small in comparison to those of smaller inland waters were studied in this paper.

TL;DR: The first product of the CoastWatch program is a set of surface water temperature images derived from NOAA AVHRR (Advanced Very High-resolution Radiometer) data.

TL;DR: The authors reviewed the possible physical effects on these regions by reviewing the relevant contributing physics known about the Great Lakes; contrasting possible marine estuary transport mechanisms with what little is published about the great lakes circumstances; and summarizing modeled results exemplifying these behaviors from a study ofSandusky Bay, Lake Erie.

TL;DR: Stomach contents of sport-caught and gill net-captured Lake Michigan lake trout were analyzed to compare the food habits of nearshore shallow water and offshore deep water trout as mentioned in this paper.

TL;DR: The frequency of significant diet overlaps among planktivores declined since an earlier study in the mid-1970s possibly indicating that competitive interactions have eased since 1975, and other factors such as increased eutrophication and predator mediated mortality likely played a role in planktivist community changes since the early 1970s.

TL;DR: In this article, the authors examined the aquatic macrophyte and algal floras of Old Woman Creek estuary (OWC) in light of work conducted in other Great Lakes coastal wetlands and found that primary productivity in OWC appears to be dominated by the algal communities rather than by macrophytes.

TL;DR: In this paper, a review summarizes the comparatively sparse information on the community structure, population dynamics, secondary productivity, and trophic relationships of invertebrates in coastal wetlands of the Laurentian Great Lakes.

TL;DR: DDE and PCB concentrations in both smelt and alewives were higher in the western end of Lake Ontario than in the eastern end, similar to the spatial trend observed for lake trout.

TL;DR: In this article, a system-oriented study of the wetlands of southwestern Lake Erie along Ohio's shoreline has been organized at two levels of hierarchy, at the ecosystem level, a specific wetland model was developed from data collected on hydrology, nutrient budgets, and aquatic metabolism.

TL;DR: Water samples freshly collected from southern Green Bay were innoculated with radiolabeled hydrophobic organic compounds (HOC) and, after equilibration, separated into particle bound, dissolved organic matter (DOM) bound and freely dissolved phases as mentioned in this paper.

TL;DR: Investigation of possible correlations between concentrations of individual polychlorinated biphenyl congeners (PCBs) or 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TCDD-EQ) and mortality in early life stages of Chinook salmon found them positively correlated with total concentrations of PCBs.

TL;DR: In this paper, the seasonal dynamics of thermal features in Lake Michigan were studied using numerous sea surface temperature images acquired from the NOAA Advanced Very High Resolution Radiometer from May-December, 1990.

TL;DR: In this paper, a conceptual model specific for coastal wetlands is presented that accounts for the wide range of redox potentials encountered over the short vertical span of the shallow OWC wetland ecosystem.

TL;DR: In this article, the spatial and temporal patterns of organochlorine contamination in lake trout from Wisconsin waters of the Great Lakes, examined laboratory contaminant analysis data of muscle tissue samples from Lake Michigan and Lake Superior (n = 317) fish.

TL;DR: In this article, the origin, characteristics, and geochemical composition of suspended matter in the nepheloid layer was investigated in the western, central, and eastern basins of Lake Ontario to evaluate the role of the Nepheloid Layer in transport of contaminants across the lake.

TL;DR: A tentative foodweb model for 1982 suggests that energy is inefficiently transferred from the primary producers to piscivorous fish and algae are consumed principally by rotifers which are eaten by cyclopoid copepods that are food for mysids.

TL;DR: In this paper, the authors compared the predictions of two different models (one of which was the new ICE-3G model) directly compared to historical water level data from Ontario and the United States and to a long-established model based on water-level data.

TL;DR: The Six Fathom Bank-Yankee Reef sanctuary as mentioned in this paper was created in the south-central portion of Lake Huron and includes the shallower portions of the six Fathom and Ipperwash scarps.

TL;DR: In this article, the authors used a 200 kHz echosoun-der and vertical net tows to study the dynamics of an aggregation of Macrohectopus branickii in Barguzin Bay, middle Lake Baikal between 27 and 30 September 1989.

TL;DR: The demonstration of equivalent concentrations of most of these organochlorine compounds in liver and muscle suggests that data on contaminant levels in muscle may be used to evaluate the potential for induction of hepatic monooxygenases in salmonids.

TL;DR: Larvae of 34 fish species were collected during 1985 and 1987 in Hamilton Harbour, a severely degraded ecosystem on Lake Ontario, where limited spawning and nursery habitat tends to confine most species to the western extremity of the harbor.