Seasonal variations in stream inorganic geochemistry are not well documented or understood. We sampled two mining-impacted and two relatively pristine streams in western Montana over a 12-month period, collecting samples every 4 weeks,... more
Seasonal variations in stream inorganic geochemistry are not well documented or understood. We sampled two mining-impacted and two relatively pristine streams in western Montana over a 12-month period, collecting samples every 4 weeks, with supplemental sampling (at least weekly) during spring runoff. We analyzed all samples for dissolved (operationally defined as <0.2 μm) and total recoverable concentrations. Generally, the trace
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Arsenic is a wide-spread contaminant of soils and sediments, and many watersheds worldwide regularly experience severe arsenic loading. While the toxicity of arsenic to plants and animals is well recognized, the geochemical and biological... more
Arsenic is a wide-spread contaminant of soils and sediments, and many watersheds worldwide regularly experience severe arsenic loading. While the toxicity of arsenic to plants and animals is well recognized, the geochemical and biological transformations that alter its bioavailability in the environment are multifaceted and remain poorly understood. This communication provides a brief overview of our current understanding of the biogeochemistry of arsenic in circumneutral freshwater sediments, placing special emphasis on microbial transformations. Arsenic can reside in a number of oxidation states and complex ions. The common inorganic aqueous species at circumneutral pH are the negatively charged arsenates (H2As(V)O4(-) and Has(V)O4(2-)) and zero-charged arsenite (H3As(III)O3(0)). Arsenic undergoes diagenesis in response to both physical and biogeochemical processes. It accumulates in oxic sediments by adsorption on and/or co-precipitation with hydrous iron and manganese oxides. Bu...
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Page 1. Mine waste contamination limits soil respiration rates: a case study using quantile regression Philip W. Ramsey a,*, Matthias C. Rilliga , Kevin P. Feris b , Johnnie N. Moore c , James E. Gannon a aMicrobial Ecology ...
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Before and during the first week of the March-April 1980 eruptions of Mount St. Helens, Washington, infrared thermal surveys were conducted to monitor the thermal activity of the volcano. The purpose was to determine if an increase in... more
Before and during the first week of the March-April 1980 eruptions of Mount St. Helens, Washington, infrared thermal surveys were conducted to monitor the thermal activity of the volcano. The purpose was to determine if an increase in thermal activity had taken place since an earlier airborne survey in 1966. Nine months before the eruption there was no evidence of an increase in thermal activity. The survey during the first week of the 1980 eruptions indicated that little or no change in thermal activity had taken place up to 4 April. Temperatures of ejected ash and steam were low and never exceeded 15 degrees C directly above the vent.
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In this paper, we present results from a large number of experiments aimed at quantifying method and instrument uncertainty associated with laser diffraction analysis. We analyzed the size distribution of fine-grained sediment (< 1-50... more
In this paper, we present results from a large number of experiments aimed at quantifying method and instrument uncertainty associated with laser diffraction analysis. We analyzed the size distribution of fine-grained sediment (< 1-50 µm) from Flathead Lake, Montana, along with samples ...
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... YiQiang Zhang* and Johnnie N. Moore ... Microbial reduc-tion of selenate is a major process transferring Se from water to sediment (Bender et al., 1991; Oremland et al., 1989, 1990; Steinberg and Oremland, 1990; Tokunaga et al., 1996;... more
... YiQiang Zhang* and Johnnie N. Moore ... Microbial reduc-tion of selenate is a major process transferring Se from water to sediment (Bender et al., 1991; Oremland et al., 1989, 1990; Steinberg and Oremland, 1990; Tokunaga et al., 1996; Zhang and Moore, 1996). This reduction ...
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... Eng., 11(3), 198220. Moore, JN, and Landrigan, EM (1999). Mobilization of metal-contaminated sediment by ice-jam floods. Environ. Geol., 37(12), 96101. Moore, JN, and Luoma, SN (1990). Hazardous wastes from large-scale metal... more
... Eng., 11(3), 198220. Moore, JN, and Landrigan, EM (1999). Mobilization of metal-contaminated sediment by ice-jam floods. Environ. Geol., 37(12), 96101. Moore, JN, and Luoma, SN (1990). Hazardous wastes from large-scale metal extraction: A case study. Environ. Sci. ...
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... P4C, 0.026 (4.9), 0.072 (13.6), 0.154 (29.0), 0.259 (48.8), 0.015 (2.8), 0.531, 0.511. P4C CNS h -1, 0.077 (2.6), 0.183 (6.2), 1.431 (48.5), 1.228 (41.6), 0.028 (1.0), 2.951, 3.052. P4C CNS h -2, 0.191 (3.9), 0.622 (12.6), 2.862... more
... P4C, 0.026 (4.9), 0.072 (13.6), 0.154 (29.0), 0.259 (48.8), 0.015 (2.8), 0.531, 0.511. P4C CNS h -1, 0.077 (2.6), 0.183 (6.2), 1.431 (48.5), 1.228 (41.6), 0.028 (1.0), 2.951, 3.052. P4C CNS h -2, 0.191 (3.9), 0.622 (12.6), 2.862 (58.1), 1.204 (24.4), 0.037 (0.8), 4.930, 4.912. a Soluble ...
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... Zhang, Johnnie N. Moore, and William T. Frankenberger, Jr.* . Department of Environmental Sciences, University of California, Riverside, California 92521-0424, and Department of Geology, University of Montana, Missoula, Montana... more
... Zhang, Johnnie N. Moore, and William T. Frankenberger, Jr.* . Department of Environmental Sciences, University of California, Riverside, California 92521-0424, and Department of Geology, University of Montana, Missoula, Montana 59812-1019. Environ. Sci. Technol. ...
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... Coarse-Grained River Floodplain Sediment: Clark Fork River, Montana, USA JOHNNIE N. MOORE, EDWARD J. BROOK, and CAROLYN JOHNS Department of Geology University of Montana Missoula, Montana 59812, USA ... 2, 107-115 © 1989... more
... Coarse-Grained River Floodplain Sediment: Clark Fork River, Montana, USA JOHNNIE N. MOORE, EDWARD J. BROOK, and CAROLYN JOHNS Department of Geology University of Montana Missoula, Montana 59812, USA ... 2, 107-115 © 1989 Springer-Verlag New York Inc. ...
Research Interests: Civil Engineering, Mass Transfer, Environmental Geology, Water Pollution, Earth and Environmental Sciences, and 11 moreCrystal structure, Aquatic Ecosystem, Developing Country, Solid waste, Surface Water, Grain size, North America, Geographic Variation, Surface Properties, Microstructures, and Interdisciplinary Engineering
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ABSTRACT Metal concentrations were determined in benthic biota, fish livers, water, and fine-grained sediment through 215 km of an intermontane river system (Blackfoot River, Montana, USA) affected by headwater inputs of acid-mine... more
ABSTRACT Metal concentrations were determined in benthic biota, fish livers, water, and fine-grained sediment through 215 km of an intermontane river system (Blackfoot River, Montana, USA) affected by headwater inputs of acid-mine effluent. Solute and particulate contaminants decreased rapidly downstream from headwater sources, but some extended through an extensive marsh system. Particulate contaminants penetrated through the marsh system, effectively resulting in food web contamination downstream of the marshes. Metals differed in their bioavailability within and below the marsh system. Cadmium was most consistently accumulated in the food web, and the general order of downstream mobilization of bioavailable metals appears to be Cd, Zn &gt; Cu &gt; As, Ni. Depauperate benthic communities and reduced fish populations occurred coincident with the sediment contamination.
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Research Interests: Geography, Water quality, Acid Mine Drainage, Cyanobacteria, Multidisciplinary, and 28 moreTemporal dynamics, Quantitative PCR, Heavy metals, Food web, Montana, Applied Environmental Microbiology, Heavy Metal, Bacteria, Polymerase Chain Reaction, Surface Water, Trophic Level, Riparian vegetation, Microbial Biomass, Heavy Metal Contamination, Alphaproteobacteria, Organic carbon, Water Quality, Water Microbiology, Large Scale, Long Term Effect, Base Sequence, Hyporheic Zone, Information Presentation, Microbial Community Structure, Seasonal Dynamics, Hyporheic microbial ecology, Betaproteobacteria, and Microbial community
Research Interests: Multidisciplinary, Seasonality, Heavy metals, Montana, Applied, and 14 moreApplied Environmental Microbiology, Heavy Metal, Polymerase Chain Reaction, Heavy Metal Contamination, Ecosystem, Fresh water, Seasons, Base Sequence, Organic Matter, Hyporheic Zone, Microbial Community Structure, Seasonal Dynamics, Geologic Sediments, and Hyporheic microbial ecology
Research Interests: Water Pollution, Multidisciplinary, Quantitative PCR, Heavy metals, Negative Affect, and 19 moreApplied, Factorial Design, Applied Environmental Microbiology, Heavy Metal, Polymerase Chain Reaction, Sterilization, Field Study, Heavy Metal Contamination, Repeated Measures, Electrophoresis, Ecosystem, Fresh water, Hyporheic Zone, Community Composition, Microbial Community Structure, Geologic Sediments, Hyporheic microbial ecology, Microbial community, and Proteobacteria
... Elevated metal concentrations in the floodplain of the Clark Fork River originate from tailings deposited onto the floodplain predominantly as overbank deposits and as point bars adjacent to abandoned channels ... Ee : :; : : 2.57 : :... more
... Elevated metal concentrations in the floodplain of the Clark Fork River originate from tailings deposited onto the floodplain predominantly as overbank deposits and as point bars adjacent to abandoned channels ... Ee : :; : : 2.57 : : :: 0.82 3.65 : : :::1.49: .:: ; 0.628 :. ...