Abstract:
:Antibiotic resistance analysis (ARA) was used to determine if enterococci of human origin were present in a stream (Spout Run) that passes through a rural nonsewered community (Millwood, VA). Millwood consists of 82 homes, all served by individual septic systems, and Spout Run drains a 5,800-ha karst topography watershed that contains large populations of livestock and wildlife. Periodic monitoring by state regulatory officials had resulted in Spout Run being placed on the Virginia impaired stream list and Millwood being categorized as an at-risk community. Stream samples were collected monthly and analyzed for fecal coliforms and enterococci (May 1999-May 2000); ARA was performed on enterococci stream isolates on a quarterly basis. All 117 stream samples were positive for fecal coliforms, and 32% exceeded the Virginia recreational water standard (1,000 fecal coliforms/100 mL). A library of 1,174 known source Enterococcus isolate antibiotic resistance profiles was constructed, and yielded correct classification rates of 94.6% for 203 human isolates, 93.7% for 734 livestock isolates, and 87.8% for 237 wildlife isolates. Antibiotic resistance analysis of 2,012 enterococcal isolates recovered from stream samples indicated isolates of human origin appeared throughout the stream as it passed through Millwood, with a yearly average of approximately 10% human, 40% wildlife, and 50% livestock. There were no human origin isolates in samples collected upstream from Millwood, and the percent human origin isolates declined downstream from Millwood. While a human signature was found in Spout Run, it was small compared with the proportion of isolates from livestock and wildlife.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Graves AK,Hagedorn C,Teetor A,Mahal M,Booth AM,Reneau RB Jrdoi
10.2134/jeq2002.1300subject
Has Abstractpub_date
2002-07-01 00:00:00pages
1300-8issue
4eissn
0047-2425issn
1537-2537journal_volume
31pub_type
杂志文章abstract::Phosphorus (P) budgets for large watersheds are often used to predict trends in riverine P export. To test such predictions, we calculated annual P budgets for 1975-1995 for soils of the Maumee and Sandusky watersheds of northwestern Ohio and compared them with riverine P export from these watersheds. Phosphorus input...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2002.9600
更新日期:2002-01-01 00:00:00
abstract::The introduction of portable in situ ultraviolet-visual spectrometers has made possible the collection of water quality parameters at a high frequency in dynamic systems such as tidal marshes. The usefulness of this technology is inhibited by fouling of the instrument's optics. In this study, a spectrometer fitted wit...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2013.02.0049
更新日期:2013-11-01 00:00:00
abstract::One strategy to limiting eutrophication in waterways is to reduce the concentration of water-extractable P (WEP) in land-applied manure. In this study, we investigated the feasibility of using mine drainage residuals (MDR), waste solids produced in large quantities from coal mine drainage treatment, to reduce WEP in d...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20157
更新日期:2020-11-01 00:00:00
abstract::Pasture systems in Hawaii are based primarily on kikuyugrass (Pennisetum clandestinum Hochst. ex Chiov.). Relationships among kikuyugrass P concentration, animal P requirements, and various soil P determinations are needed to help identify source areas for implementing pasture management strategies to limit P loss via...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.0393
更新日期:2005-06-07 00:00:00
abstract::Sand-sized particles (>63 microm) in whole storm water samples collected from urban runoff have the potential to produce data with substantial bias and/or poor precision both during sample splitting and laboratory analysis. New techniques were evaluated in an effort to overcome some of the limitations associated with ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0147
更新日期:2007-01-09 00:00:00
abstract::Laboratory microcosm experiments were used to assess the effects of environmental parameters on the persistence of the Bacteroides 16S rRNA genes derived from equine fecal samples in stream water to investigate the utility of Bacteroides spp. as fecal indicator organisms. Quantitative real-time polymerase chain reacti...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0258
更新日期:2009-04-27 00:00:00
abstract::Denitrifying bioreactors (DNBRs) harness the natural capacity of microorganisms to convert bioavailable nitrogen (N) into inert nitrogen gas (N) by providing a suitable anaerobic habitat and an organic carbon energy source. Woodchip systems are reported to remove 2 to 22 g N m d, but the potential to enhance denitrifi...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.04.0179
更新日期:2016-05-01 00:00:00
abstract::Phosphorus dissolution often increases as soils become more reduced, but the mechanisms are not fully understood. The objectives of this research were to determine rates and mechanisms of P dissolution during microbial reduction of a surface soil from the North Carolina Coastal Plain. Duplicate suspensions of silt + c...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.1793
更新日期:2004-09-01 00:00:00
abstract::The management of artificially drained organic soils is a very important issue, since the accelerated mineralization and sometimes peat fires alter physical and chemical properties of soils and the availability of plant nutrients. This study was performed to determine relatively short- and long-term effects of peat fi...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0170
更新日期:2006-04-03 00:00:00
abstract::The contents and stable S isotope ratio (δS) values of total S, organic S, SO-S, and total reduced inorganic S (TRS) in typical limestone soil and yellow soil were analyzed in this study to examine the general distributions of S forms and their δS values in soils in karst areas of southwest China. Under a similar leve...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2013.09.0359
更新日期:2014-05-01 00:00:00
abstract::Cotton (Gossypium hirsutum L.) defoliant runoff was recently identified as an ecological risk. However, assessments are not supported by field studies. Runoff potential of three defoliant active ingredients, dimethipin (2,3-dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4-tetraoxide), thidiazuron (N-phenyl-N-1,2,3-thidiazol-5...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2003.2180
更新日期:2003-11-01 00:00:00
abstract::The efficacy of vegetative buffer strips (VBS) in removing herbicides deposited from surface runoff is related to the ability of plant species to promote rapid herbicide degradation. A growth chamber study was conducted to compare C-atrazine (ATR) degradation profiles in soil rhizospheres from different forage grasses...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2010.0440
更新日期:2011-07-01 00:00:00
abstract::Ultraviolet-B radiation is an environmental stress for plants and this situation could become aggravated in the next decades. In this study we used Italian ryegrass (Lolium multiflorum Lam.) as a model system to test whether an environmental stress derived from global change, such as UVB, can influence the efficacy of...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.1376
更新日期:2004-07-01 00:00:00
abstract::Repeated manure application can lead to excessive soil test P (STP) levels and increased P concentration in runoff, but also to improved water infiltration and reduced runoff. Research was conducted to evaluate soil P tests in prediction of P concentration in runoff and to determine the residual effects of composted m...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0084
更新日期:2006-03-01 00:00:00
abstract::When wetlands are disturbed by cattle, pulses of contaminants may be released. We studied nitrogen exports from a small pastoral wetland (1725 m) in the Lake Taupo Catchment, New Zealand, to which cattle and sheep had periodic access. Flow, turbidity, and water quality samples were collected at the wetland outlet over...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2010.0435
更新日期:2012-09-01 00:00:00
abstract::Nitrogen (N) and phosphorus (P) loading from the Mississippi/Atchafalaya River Basin (MARB) has been linked to hypoxia in the Gulf of Mexico. To describe where and from what sources those loads originate, SPAtially Referenced Regression On Watershed attributes (SPARROW) models were constructed for the MARB using geosp...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2013.02.0066
更新日期:2013-09-01 00:00:00
abstract::During recent decades, a change in land use in the mountainous regions of Northern Thailand has been accompanied by an increased input of agrochemicals. We identified lateral water flow and pesticide transport pathways and mechanisms in a Hapludult on a sloped litchi orchard in Northern Thailand. During two rainy seas...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0241
更新日期:2007-06-27 00:00:00
abstract::Stormwater infiltration basins, one of the typical stormwater best management practices, are commonly constructed for surface water pollution control, flood mitigation, and groundwater restoration in rural or residential areas. These basins have soils with better infiltration capacity than the native soil; however, th...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2012.0504
更新日期:2013-07-01 00:00:00
abstract::Coastal aquatic ecosystems are increasingly affected by diffuse source nutrient water pollution from agricultural activities in coastal catchments, even though these ecosystems are important from a social, environmental and economic perspective. To warrant sustainable economic development of coastal regions, we need t...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2011.0400
更新日期:2014-01-01 00:00:00
abstract::DIMBOA (3,4-dihydro-2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3-one), a major benzoxazinone of Poaceae plants, was isolated and purified from corn seedlings. The effect of isolated and purified DIMBOA on the degradation of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine], and its toxic breakdown produc...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.0409
更新日期:2005-11-07 00:00:00
abstract::Field-scale relationships between soil test phosphorus (STP) and flow-weighted mean concentrations (FWMCs) of dissolved reactive phosphorus (DRP) and total phosphorus (TP) in runoff are essential for modeling phosphorus losses, but are lacking. The objectives of this study were (i) to determine the relationships betwe...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0502
更新日期:2007-07-17 00:00:00
abstract::The interaction of sulfonamide antimicrobial agents with smectite clay minerals and humic acid (HA)-clay complexes was investigated in batch experiments to assess the influence of adsorbed humic acid on sulfonamide sorption. Soil HA-clay complexes were produced at HA:clay ratios of 1:5, 1:50, and 1:100 (w/w). Vibratio...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0274
更新日期:2009-12-30 00:00:00
abstract::A lysimeter trench was established at the Gardermoen delta (50 km north of Oslo, Norway) to study the flow of water and transport and degradation of aromatic jet fuel components (toluene and o-xylene) in the undisturbed unsaturated zone. Site investigations with ground-penetrating radar revealed the presence of dippin...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2002.1809
更新日期:2002-11-01 00:00:00
abstract::Microbial mineralization of urea and uric acid in poultry litter results in the production of ammonia, which can lead to decreased poultry performance, malodorous emissions, and loss of poultry litter value as a fertilizer. Despite the fact that this is a microbial process, little is known about how the microbial popu...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2008.0024
更新日期:2008-10-23 00:00:00
abstract::Vegetation that develops spontaneously on metal-contaminated soils presents an opportunity to evaluate both metal bioavailability and the risks posed to biota. The behavior of Cd and Zn in the species of a spontaneously developed woodland, colonizing a canal embankment, has been investigated. Nitric-acid-extractable m...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0218
更新日期:2007-06-27 00:00:00
abstract::Spray irrigation of forested land can provide an effective system for nutrient removal and treatment of municipal wastewater. Evolution of N2 + N2O from denitrifying activity is an important renovation pathway for N applied to forested land treatment systems. Federal and state guidance documents for design of forested...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2001.3041411x
更新日期:2001-07-01 00:00:00
abstract::Potent estrogenic hormones are consistently detected in the environment at low concentration, yet these chemicals are strongly sorbed to soil and are labile. The objective of this research was to improve the understanding of the processes of sorption, mobility, and transformation for estrogens in natural soils, and th...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.0290
更新日期:2005-07-05 00:00:00
abstract::Water resources protection from nitrate nitrogen (NO3-N) contamination is an important public concern and a major national environmental issue. The abilities of the SOIL-SOILN model to simulate water drainage and nitrate N fluxes from orchardgrass (Dactylis glomerata L.) were evaluated using data from a 3-yr field exp...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2001.302584x
更新日期:2001-03-01 00:00:00
abstract::Biosolids can be a source of metals and metal nanoparticles. The objective of this study was to quantify and characterize the accumulation and transport of silver (Ag) in a natural soil that has received agronomically recommended rates of biosolids as fertilizer from 1994 to 2017. Total Ag concentrations were measured...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20156
更新日期:2020-11-01 00:00:00
abstract::In Britain, frequent rainfall means that there is a high potential for rapid, direct (incidental) losses of phosphorus (P) to occur after fertilizer or manure application. However, despite the known contribution of P to the eutrophication of water bodies in Britain, such incidental transfers have received little exper...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2001.2105
更新日期:2001-11-01 00:00:00