Bruce A Manny (Former Employee)
Science and Products
Filter Total Items: 63
The Detroit River, Michigan: an ecological profile
A part of the connecting channel system between Lake Huron and Lake Erie, the Detroit River forms an integral link between the two lakes for both humans and biological resources such as fish, nutrients, and plant detritus. This profile summarizes existing scientific information on the ecological structure and functioning of this ecosystem. Topics include the geological history of the region, clim
Authors
Bruce A. Manny, Thomas A. Edsall, Eugene Jaworski
The St. Clair River and Lake St. Clair, Michigan: an ecological profile
The St. Clair River and Lake St. Clair form a part of the connecting channel system between Lake Huron and Lake Erie. This report synthesizes existing information on the ecological structure and function of this ecosystem. Chapters include descriptions of climatology, hydrology, and geology of the region; biological characteristics; ecological relationships; and commercial and recreational uses,
Authors
Thomas A. Edsall, Bruce A. Manny, Nicholas Raphael
Use of low-altitude aerial photography to identify submersed aquatic macrophytes
The feasibility of using low-altitude aerial photography to identify beds of submersed macrophytes is demonstrated. True color aerial photos and collateral ground survey information for submersed aquatic macrophyte beds at 10 sites in the St.Clair-Detroit River system were obtained in September 1978. Using the photos and collateral ground survey information, a dichotomous key was developed for the
Authors
Donald W. Schloesser, Bruce A. Manny, Charles L. Brown, Eugene Jaworski
Acid rain stimulation of Lake Michigan phytoplankton growth
Three laboratory experiments demonstrated that additions of rainwater to epilimnetic lake water collected in southeastern Lake Michigan stimulated chlorophyll a production more than did additions of reagent-grade water during incubations of 12 to 20 d. Chlorophyll a production did not begin until 3–5 d after the rain and lake water were mixed. The stimulation caused by additions of rain acidified
Authors
Bruce A. Manny, G.L. Fahnenstiel, W.S. Gardner
Distribution of submersed macrophytes in the St. Clair-Detroit River System, 1978
An extensive survey was conducted in fall 1978 to determine the distribution and abundance of submersed macrophytes through the St. Clair-Detroit River system from Lake Huron to Lake Erie. Submersed macrophytes, representing 19 taxa, were widely distributed in the system, being found on 358 km2 (30%) of the total 1185 km2 of substrate surveyed. Of the 19 taxa identified, 8 common taxa were found o
Authors
Donald W. Schloesser, Bruce A. Manny
Growth of submersed macrophyte communities in the St. Clair - Detroit River system between Lake Huron and Lake Erie
Growth of submersed aquatic macrophytes was determined from observation and on the basis of biomass of samples collected from April to November 1978 at seven study sites in a major river system of the Great Lakes, the St. Clair – Detroit river system between Lake Huron and Lake Erie. Growth usually began between April and June, peaked between July and October, and decreased by late November. Maxim
Authors
Donald W. Schloesser, Thomas A. Edsall, Bruce A. Manny
Ecological effects of rubble-mound breakwater construction and channel dredging at West Harbor, Ohio (western Lake Erie)
The investigation reported herein indicated that breakwater construction and associated channel dredging activities by the US Army Corps of Engineers in western Lake Erie at the entrance to West Harbor (Ohio) had no detectable adverse impacts on the distributions or abundances of macrozoobenthos and fishes. Rather, increases were noted in the number of fish eggs and larvae and in the density and b
Authors
Bruce A. Manny, Donald W. Schloesser, Charles L. Brown, John R. P. French
Comparison of methods for measuring surface area of submersed aquatic macrophytes
The surface area of submersed macrophytes is often viewed from different perspectives such as substrate for colonization by periphyton, or protective cover for fishes. Consequently, several different methods have been used to measure it. We describe a method for measuring that area with an electronic surface area meter, a device that yields, for large samples of macrophytes, measurements in units
Authors
Charles L. Brown, Bruce A. Manny
Distribution of Eurasian watermilfoil, Myriophyllum spicatum, in the St. Clair-Detroit River system in 1978
Submersed macrophytes were surveyed at 595 stations located throughout the St. Clair-Detroit River system between Lakes Huron and Erie, 23 August to 13 October 1978. Eurasian watermilfoil (Myriophyllum spicatum), first recorded in the system in 1974, became the fourth most common submersed macrophyte in the system by 1978. However, it has not been reported as a widespread nuisance in this system a
Authors
Donald W. Schloesser, Bruce A. Manny
Rapid qualitative method for estimating the biomass of submersed macrophytes in large water bodies
Abstract has not been submitted
Authors
Donald W. Schloesser, Bruce A. Manny
Potential impacts of water diversion on fishery resources in the Great Lakes
Uses of Great Lakes water within the Great Lakes basin are steadily increasing, and critical water shortages elsewhere may add to the demands for diversions of water out of the basin in the near future. The impacts of such diversions on fish in the Great Lakes must be considered in the context of in-basin uses of the water, because in-basin uses already adversely affect the fishery resources. Temp
Authors
Bruce A. Manny
Nearshore phytoplankton of Hammond Bay, Lake Huron
To predict the effects of increased nutrient loading on nearshore phytoplankton populations in northern Lake Huron, we collected phytoplankton from a small, nearshore water intake at Hammond Bay four times per week from August 1973 to July 1975. Phytoplankton density, taxonomic composition, and biomass in the nearshore waters followed predictable, seasonal fluctuations during each of two 12-month
Authors
Charles L. Brown, Bruce A. Manny
Science and Products
Filter Total Items: 63
The Detroit River, Michigan: an ecological profile
A part of the connecting channel system between Lake Huron and Lake Erie, the Detroit River forms an integral link between the two lakes for both humans and biological resources such as fish, nutrients, and plant detritus. This profile summarizes existing scientific information on the ecological structure and functioning of this ecosystem. Topics include the geological history of the region, clim
Authors
Bruce A. Manny, Thomas A. Edsall, Eugene Jaworski
The St. Clair River and Lake St. Clair, Michigan: an ecological profile
The St. Clair River and Lake St. Clair form a part of the connecting channel system between Lake Huron and Lake Erie. This report synthesizes existing information on the ecological structure and function of this ecosystem. Chapters include descriptions of climatology, hydrology, and geology of the region; biological characteristics; ecological relationships; and commercial and recreational uses,
Authors
Thomas A. Edsall, Bruce A. Manny, Nicholas Raphael
Use of low-altitude aerial photography to identify submersed aquatic macrophytes
The feasibility of using low-altitude aerial photography to identify beds of submersed macrophytes is demonstrated. True color aerial photos and collateral ground survey information for submersed aquatic macrophyte beds at 10 sites in the St.Clair-Detroit River system were obtained in September 1978. Using the photos and collateral ground survey information, a dichotomous key was developed for the
Authors
Donald W. Schloesser, Bruce A. Manny, Charles L. Brown, Eugene Jaworski
Acid rain stimulation of Lake Michigan phytoplankton growth
Three laboratory experiments demonstrated that additions of rainwater to epilimnetic lake water collected in southeastern Lake Michigan stimulated chlorophyll a production more than did additions of reagent-grade water during incubations of 12 to 20 d. Chlorophyll a production did not begin until 3–5 d after the rain and lake water were mixed. The stimulation caused by additions of rain acidified
Authors
Bruce A. Manny, G.L. Fahnenstiel, W.S. Gardner
Distribution of submersed macrophytes in the St. Clair-Detroit River System, 1978
An extensive survey was conducted in fall 1978 to determine the distribution and abundance of submersed macrophytes through the St. Clair-Detroit River system from Lake Huron to Lake Erie. Submersed macrophytes, representing 19 taxa, were widely distributed in the system, being found on 358 km2 (30%) of the total 1185 km2 of substrate surveyed. Of the 19 taxa identified, 8 common taxa were found o
Authors
Donald W. Schloesser, Bruce A. Manny
Growth of submersed macrophyte communities in the St. Clair - Detroit River system between Lake Huron and Lake Erie
Growth of submersed aquatic macrophytes was determined from observation and on the basis of biomass of samples collected from April to November 1978 at seven study sites in a major river system of the Great Lakes, the St. Clair – Detroit river system between Lake Huron and Lake Erie. Growth usually began between April and June, peaked between July and October, and decreased by late November. Maxim
Authors
Donald W. Schloesser, Thomas A. Edsall, Bruce A. Manny
Ecological effects of rubble-mound breakwater construction and channel dredging at West Harbor, Ohio (western Lake Erie)
The investigation reported herein indicated that breakwater construction and associated channel dredging activities by the US Army Corps of Engineers in western Lake Erie at the entrance to West Harbor (Ohio) had no detectable adverse impacts on the distributions or abundances of macrozoobenthos and fishes. Rather, increases were noted in the number of fish eggs and larvae and in the density and b
Authors
Bruce A. Manny, Donald W. Schloesser, Charles L. Brown, John R. P. French
Comparison of methods for measuring surface area of submersed aquatic macrophytes
The surface area of submersed macrophytes is often viewed from different perspectives such as substrate for colonization by periphyton, or protective cover for fishes. Consequently, several different methods have been used to measure it. We describe a method for measuring that area with an electronic surface area meter, a device that yields, for large samples of macrophytes, measurements in units
Authors
Charles L. Brown, Bruce A. Manny
Distribution of Eurasian watermilfoil, Myriophyllum spicatum, in the St. Clair-Detroit River system in 1978
Submersed macrophytes were surveyed at 595 stations located throughout the St. Clair-Detroit River system between Lakes Huron and Erie, 23 August to 13 October 1978. Eurasian watermilfoil (Myriophyllum spicatum), first recorded in the system in 1974, became the fourth most common submersed macrophyte in the system by 1978. However, it has not been reported as a widespread nuisance in this system a
Authors
Donald W. Schloesser, Bruce A. Manny
Rapid qualitative method for estimating the biomass of submersed macrophytes in large water bodies
Abstract has not been submitted
Authors
Donald W. Schloesser, Bruce A. Manny
Potential impacts of water diversion on fishery resources in the Great Lakes
Uses of Great Lakes water within the Great Lakes basin are steadily increasing, and critical water shortages elsewhere may add to the demands for diversions of water out of the basin in the near future. The impacts of such diversions on fish in the Great Lakes must be considered in the context of in-basin uses of the water, because in-basin uses already adversely affect the fishery resources. Temp
Authors
Bruce A. Manny
Nearshore phytoplankton of Hammond Bay, Lake Huron
To predict the effects of increased nutrient loading on nearshore phytoplankton populations in northern Lake Huron, we collected phytoplankton from a small, nearshore water intake at Hammond Bay four times per week from August 1973 to July 1975. Phytoplankton density, taxonomic composition, and biomass in the nearshore waters followed predictable, seasonal fluctuations during each of two 12-month
Authors
Charles L. Brown, Bruce A. Manny