Contaminant biomonitoring at the Benton Lake National Wildlife Refuge in 1988
Technical Report
·
OSTI ID:6012148
Trace element concentrations in sediment samples from Benton Lake National Wildlife Refuge were not elevated relative to the western U.S. geometric mean concentrations. Boron concentrations in aquatic plants approached the concentration of boron in Mallard (Anas platyrhyncos) diets that reduced hatching success. Among the three invertebrate taxa sampled, only midge larvae (Chironomidae) bioaccumulated selenium. Selenium concentrations in Eared Grebe livers exceeded the levels found in the livers of Mallards that experienced reproductive problems. Four hundred thirty-eight water bird nests were located during nest searches, and 536 eggs were examined from 179 of those nests. A minimum of 8.4% of the eggs laid contained dead embryos, and 0.1% contained abnormal embryos. Rates of embryo death and abnormality were similar to rates of presumably unpolluted natural populations. Mean selenium concentrations in Eared Grebe, Northern Pintail (Anas acuta), Mallard, and American Coot (Fulica americana) eggs exceeded the 3 micrograms/g dry weight concentration typical of natural background levels. However, only one of three deformed bird embryos had a selenium concentration greater than 3 micrograms/g dry weight. Organochlorine residues in bird eggs did not exceed concentrations believed to be harmless.
- Research Organization:
- Fish and Wildlife Service, Helena, MT (United States). Montana State Office
- OSTI ID:
- 6012148
- Report Number(s):
- PB-92-105923/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BIOLOGICAL ACCUMULATION
BIOLOGICAL INDICATORS
BIRDS
BORON
CONTAMINATION
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ELEMENTS
FEDERAL REGION VIII
INVERTEBRATES
MONTANA
NATURE RESERVES
NORTH AMERICA
POLLUTION
RESOURCES
SEDIMENTS
SELENIUM
SEMIMETALS
USA
VERTEBRATES
WATER POLLUTION
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BIOLOGICAL ACCUMULATION
BIOLOGICAL INDICATORS
BIRDS
BORON
CONTAMINATION
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ELEMENTS
FEDERAL REGION VIII
INVERTEBRATES
MONTANA
NATURE RESERVES
NORTH AMERICA
POLLUTION
RESOURCES
SEDIMENTS
SELENIUM
SEMIMETALS
USA
VERTEBRATES
WATER POLLUTION