Regional Ecorisk Field investigation, upper Clark Fork River Basin
Conference
·
OSTI ID:201211
- PTI Environmental Services, Bellevue, WA (United States)
The Regional Ecorisk Field Investigation was conducted at the Clark Fork River Superfund Site (Montana) to evaluate the relationships between plant communities and tailings deposits in riparian habitats and to evaluate food-chain transfer of trace elements to selected wildlife species. Stations were selected to represent a range of vegetation biomass (or cover) values and apparent impact of trace elements, with some areas of lush vegetation, some areas of mostly unvegetated soil (e.g., < 30 percent plant cover), and a gradient in between. For the evaluation of risk to wildlife, bioaccumulation of metals was evaluated in native or naturalized plants, terrestrial invertebrates, and the deer mouse (Peromyscus maniculatus). Potential reproductive effects in the deer mouse were evaluated by direct measurements. For other wildlife species, bioaccumulation data were interpreted in the context of food web exposure models. Total biomass and species richness of riparian plant communities are related to tailings content of soil as indicated by pH and metals concentrations. Risk to populations of omnivorous small mammals such as the deer mouse was not significant. Relative abundance and reproductive condition of the deer mouse were normal, even in areas of high metals enrichment. Based on exposure models and site-specific tissue residue data for dietary species, risk to local populations of predators such as red fox and American kestrel that feed on deer mice and terrestrial invertebrates is not significant. Risk to herbivores related to metals bioaccumulation in plant tissues is not significant. Population level effects in deer and other large wildlife are not expected because of the large home ranges of such species and compensatory demographic factors.
- OSTI ID:
- 201211
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mining-related metals in terrestrial food webs of the upper Clark Fork River basin
Ecological risk assessment of small mammals at a zinc smelter
Water quality criteria/toxicological benchmarks for nitroaromatic munitions compounds
Conference
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:33568
Ecological risk assessment of small mammals at a zinc smelter
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:367507
Water quality criteria/toxicological benchmarks for nitroaromatic munitions compounds
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:455305