Bruce A Manny (Former Employee)
Science and Products
Filter Total Items: 63
Additions of nutrients and major ions by the atmosphere and tributaries to nearshore waters of northwestern Lake Huron
Nutrient additions by the atmosphere and six tributaries to nearshore waters of northwestern Lake Huron were measured at weekly intervals from August 1975 to July 1976. The atmosphere contributed 43% of the nitrogen (N) and 10% of the phosphorus (P) that was added during the year. The 1975–76 atmospheric loading rate of total N to this area (11 kg/ha/yr) was one of the highest found to date in the
Authors
Bruce A. Manny, R.W. Owens
Loss of nitrogenous dissolved organic matter from small lakes
To determine how much organic nitrogen is lost from lakes during winter by natural processes, we collected water in fall and winter from six small lakes (area, 5-822 hectares) and separated organic matter dissolved in the water with n-butanol into three fractions--yellow organic acids, a white precipitate, and aqueous (nonextractable) organic matter. The nitrogen content of each fraction was measu
Authors
Bruce A. Manny, Akira Otsuki
Annual contribution of carbon, nitrogen, and phosphorus by migrant Canada geese to a hardwater lake
Each year more than 6,000 migrant Canada geese (Branta canadensis interior Todd) rest for 3 to 10 days during the months of March, October, November, and December on Wintergreen Lake, a productive 15 ha (33 acre) hardwater lake in the W. K. Kellogg Bird Sanctuary of Michigan State University in southwestern Michigan. For the past six years accurate weekly counts have been made of resident and migr
Authors
Bruce A. Manny, Robert G. Wetzel, W.C. Johnson
Science and Products
Filter Total Items: 63
Additions of nutrients and major ions by the atmosphere and tributaries to nearshore waters of northwestern Lake Huron
Nutrient additions by the atmosphere and six tributaries to nearshore waters of northwestern Lake Huron were measured at weekly intervals from August 1975 to July 1976. The atmosphere contributed 43% of the nitrogen (N) and 10% of the phosphorus (P) that was added during the year. The 1975–76 atmospheric loading rate of total N to this area (11 kg/ha/yr) was one of the highest found to date in the
Authors
Bruce A. Manny, R.W. Owens
Loss of nitrogenous dissolved organic matter from small lakes
To determine how much organic nitrogen is lost from lakes during winter by natural processes, we collected water in fall and winter from six small lakes (area, 5-822 hectares) and separated organic matter dissolved in the water with n-butanol into three fractions--yellow organic acids, a white precipitate, and aqueous (nonextractable) organic matter. The nitrogen content of each fraction was measu
Authors
Bruce A. Manny, Akira Otsuki
Annual contribution of carbon, nitrogen, and phosphorus by migrant Canada geese to a hardwater lake
Each year more than 6,000 migrant Canada geese (Branta canadensis interior Todd) rest for 3 to 10 days during the months of March, October, November, and December on Wintergreen Lake, a productive 15 ha (33 acre) hardwater lake in the W. K. Kellogg Bird Sanctuary of Michigan State University in southwestern Michigan. For the past six years accurate weekly counts have been made of resident and migr
Authors
Bruce A. Manny, Robert G. Wetzel, W.C. Johnson