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- Author:
- Dungan, Robert S., et al. ; Bjorneberg, David L.; Show all 2 Author
- Source:
- Environmental pollution 2020 v.257 pp. 113568
- ISSN:
- 0269-7491
- Subject:
- antibiotic resistance; antibiotic resistance genes; droplets; integrases; irrigation; plasmids; ribosomal RNA; surface water; watersheds; Idaho
- Abstract:
- ... Surface waters could be a dominant route by which antibiotic resistance genes (ARGs) are disseminated. In the present study we explored the prevalence and abundance of ARGs [blaCTX₋M₋₁, erm(B), sul1, tet(B), tet(M), and tet(X)], class 1 integron-integrase gene (intI1), and IncP-1 and IncQ-1 plasmids in eight irrigation return flows (IRFs) and a background site (Main Line Canal, MLC) in the Upper S ...
- DOI:
- 10.1016/j.envpol.2019.113568
- https://dx.doi.org/10.1016/j.envpol.2019.113568
- Author:
- Dungan, Robert S., et al. ; Ducey, Thomas F.; Durso, Lisa M.; Ibekwe, Abasiofiok M.; Jackson, Charlene R.; Frye, Jonathan G.; Castleberry, B. Lana; Rashash, Diana M.C.; Rothrock, Michael J.; Boykin, Debbie; Whitehead, Terence R.; Ramos, Zeanmarj; McManus, Morgan; Cook, Kimberly L.; Show all 14 Authors
- Source:
- Journal of hazardous materials 2020 v.382 pp. 120991
- ISSN:
- 0304-3894
- Subject:
- Escherichia coli; animal production; antibiotic resistance genes; beef cattle; dairy cattle; humans; phenotypic variation; phylogeny; poultry; production technology; pulsed-field gel electrophoresis; swine; tetracycline; United States
- Abstract:
- ... There are limited numbers of Escherichia coli isolate panels that represent United States food animal production. The majority of existing Escherichia coli isolate panels are typically designed: (i) to optimize genetic and/or phenotypic diversity; or (ii) focus on human isolates. To address this shortfall in agriculturally-related resources, we have assembled a publicly-available isolate panel (Ag ...
- DOI:
- 10.1016/j.jhazmat.2019.120991
- https://dx.doi.org/10.1016/j.jhazmat.2019.120991
- Author:
- Dungan, Robert S., et al. ; McKinney, Chad W.; Leytem, April B.; Show all 3 Authors
- Source:
- The Science of the total environment 2018 v.635 pp. 1477-1483
- ISSN:
- 0048-9697
- Subject:
- agricultural soils; antibiotic resistance genes; copper; copper sulfate; crops; quantitative polymerase chain reaction; ribosomal RNA; soil sampling; wastewater; wastewater irrigation; wastewater treatment; wheat
- Abstract:
- ... The application of dairy wastewater to agricultural soils is a widely used practice to irrigate crops and recycle nutrients. In this study, small-scale field plots were irrigated monthly (6 times) with dairy wastewater (100%), wastewater diluted to 50% with irrigation (canal) water, and diluted wastewater spiked with copper sulfate (50 mg Cu L⁻¹), while control plots were irrigated with canal wate ...
- DOI:
- 10.1016/j.scitotenv.2018.04.020
- https://dx.doi.org/10.1016/j.scitotenv.2018.04.020
- Author:
- Dungan, Robert S., et al. ; Snow, Daniel D.; Bjorneberg, David L.; Show all 3 Authors
- Source:
- Journal of environmental quality 2017 v.46 no.6 pp. 1455-1461
- ISSN:
- 0047-2425
- Subject:
- agricultural watersheds; animal manures; antibiotic residues; aquatic environment; irrigation; irrigation water; metabolites; monensin; oxytetracycline; pollutants; river water; runoff; soil; sulfadimethoxine; sulfamethazine; sulfamethoxazole; surface water; trimethoprim; tylosin; wastewater; Idaho; Snake River
- Abstract:
- ... The polar organic compound integrative sampler (POCIS) is a tool that has been effectively used to passively sample organic pollutants over long periods in aquatic environments. In this study, POCIS were used to investigate the spatial and temporal occurrence of 21 antibiotics in irrigation return flows and upstream sites of an intensively managed agricultural watershed in south-central Idaho. The ...
- DOI:
- 10.2134/jeq2017.06.0229
- https://dx.doi.org/10.2134/jeq2017.06.0229
5. Spatial and temporal variation in physicochemical properties of dairy lagoons in south-central Idaho
- Author:
- Dungan, Robert S., et al. ; Leytem, April B.; Bjorneberg, David L.; Show all 3 Authors
- Source:
- Transactions of the ASABE 2017 v.60 no.2 pp. 439-447
- ISSN:
- 2151-0032
- Subject:
- air quality; ammonia; ammonium nitrogen; autumn; chemical oxygen demand; climate change; dairies; dissolved oxygen; electrical conductivity; forage quality; free stalls; greenhouse gas emissions; greenhouse gases; leaching; models; nutrients; pH; phosphorus; potassium; seasonal variation; spring; surveys; temperature; total solids; waste lagoons; wastewater; Idaho
- Abstract:
- ... Large quantities of wastewater are generated on dairies in south-central Idaho, which can be a source of valuable nutrients as well as contribute to air quality and climate change issues via ammonia (NH3) and greenhouse gas (GHG) emissions. The objective of this study was to examine the range of lagoon water properties among dairies in the region and to determine how they varied spatially and temp ...
- Handle:
- 10113/5801867
- DOI:
- 10.13031/trans.11991
- http://dx.doi.org/10.13031/trans.11991
- Author:
- Dungan, Robert S., et al. ; Leytem, April B.; Show all 2 Author
- Source:
- Aerosol science and technology 2016 v.50 no.1 pp. 71-75
- ISSN:
- 0278-6826
- Subject:
- Escherichia coli O157; ambient temperature; betaine; bioaerosols; evaporation; microorganisms; osmotolerance; peptones; probability; samplers; viability; viscosity
- Abstract:
- ... Collection fluids used in liquid-based bioaerosol samplers can influence the viability of microorganisms. In this study we determined the recovery efficiency of vegetative E. coli O157:H7 cells that were spiked into low viscosity evaporating collection fluids during operation of a BioSampler™ for up to 90 min at room temperature. The collection fluids tested were distilled (DI) water, phosphate-bu ...
- Handle:
- 10113/62021
- DOI:
- 10.1080/02786826.2015.1126666
- http://dx.doi.org/10.1080/02786826.2015.1126666
- Author:
- Dungan, Robert S., et al. ; Khalil, Tariq M.; Stöckle, Claudio O.; Carlson, Bryan R.; Uslar-Valle, Nicole; Nelson, Roger L.; Frear, Craig S.; Ma, Jingwei; Higgins, Stewart S.; Leytem, April B.; Show all 10 Authors
- Source:
- Computers and electronics in agriculture 2019
- ISSN:
- 0168-1699
- Subject:
- ammonia; anaerobic digestion; animal manure management; carbon; concentrated animal feeding operations; cropping systems; dairy industry; dairy manure; decision making; decision support systems; environmental protection; equations; greenhouse gas emissions; greenhouse gases; irrigation; land application; model validation; models; nitrogen; nitrous oxide production; nutrient management; nutrients; nutritive value; phosphorus; risk
- Abstract:
- ... Dairy concentrated animal feeding operations (CAFO) are required to implement nutrient management plans enforced by environmental protection agencies to minimizing the risk of water resource degradation and to report gaseous emissions when they exceed certain threshold values. Although tools exist to aid in completing such tasks, few of the tools integrate the impact of on-farm manure treatment un ...
- DOI:
- 10.1016/j.compag.2019.05.039
- https://dx.doi.org/10.1016/j.compag.2019.05.039
- Author:
- Dungan, Robert S., et al. ; Leytem, April B.; Show all 2 Author
- Source:
- Journal of environmental quality 2015 v.44 no.5 pp. 1550-1555
- ISSN:
- 0047-2425
- Subject:
- DNA; Marichromatium; Thiocapsa roseopersicina; Thiolamprovum pedioforme; carotenoids; chemical oxygen demand; dairies; denaturing gradient gel electrophoresis; genes; growth factors; livestock; manure storage; microbial detection; nitrogen; odors; ponds; ribosomal RNA; salinity; sampling; solids; sulfur; wastewater
- Abstract:
- ... The presence of purple bacteria in manure storage lagoons is often associated with reduced odors. In this study, our objectives were to determine the occurrence of purple sulfur bacteria (PSB) in seven dairy wastewater lagoons and to identify possible linkages between wastewater properties and purple blooms. Community DNA was extracted from composited wastewater samples, and a conservative 16S rRN ...
- Handle:
- 10113/61488
- DOI:
- 10.2134/jeq2015.03.0128
- https://dx.doi.org/10.2134/jeq2015.03.0128
- Author:
- Dungan, Robert S., et al. ; Niu, Mutian; Appuhamy, Jayasooriya A.D.R.N.; Kebreab, Ermias; Leytem, April B.; Show all 5 Authors
- Source:
- Agriculture, ecosystems & environment 2017 v.250 pp. 51-58
- ISSN:
- 0167-8809
- Subject:
- carbon; crude protein; dairy cattle; diet; environmental impact; excretion; forage; manure storage; methane; milk production; nitrogen; nitrogen content; nutrient use efficiency; physicochemical properties; slurries; soil
- Abstract:
- ... Altering dairy cattle diets to reduce both enteric methane (CH4) production and nitrogen (N) excretion are valuable tools for mitigating the environmental impact of dairy production. We examined the impact of altering diets on changes in physicochemical properties of manure during storage and short term plant N availability. Manure collected from cattle fed diets with differing forage and crude pr ...
- Handle:
- 10113/5823469
- DOI:
- 10.1016/j.agee.2017.08.034
- CHORUS:
- 10.1016/j.agee.2017.08.034
- https://dx.doi.org/10.1016/j.agee.2017.08.034
- Author:
- Dungan, Robert S., et al. ; Leytem, April B.; Tarkalson, David D.; Ippolito, James A.; Bjorneberg, David L.; Show all 5 Authors
- Source:
- Soil Science Society of America journal 2017 v.81 no.3 pp. 537-545
- ISSN:
- 0361-5995
- Subject:
- Hordeum vulgare; Medicago sativa; Zea mays; agricultural soils; alfalfa; autumn; barley; carbon dioxide; composted manure; conventional tillage; corn; crop rotation; crop yield; dairy manure; forage; forage crops; greenhouse gas emissions; greenhouse gases; irrigated farming; methane production; nitrification inhibitors; nitrogen; nitrogen content; nitrous oxide; oxidation; semiarid soils; silage; spring; sprinkler irrigation; urea; urea fertilizers; urease; Western United States
- Abstract:
- ... Information is needed regarding the effect of N source on greenhouse gas (GHG) emissions from irrigated semiarid agricultural soils. We report N₂O, CO₂, and CH₄ emissions from a silage corn (Zea mays L.) (2013)–barley (Hordeum vulgare L.) (2014)–alfalfa (Medicago sativa L.) (2015) rotation under conventional tillage and sprinkler irrigation. We evaluated the effectiveness of an enhanced-efficiency ...
- Handle:
- 10113/5801848
- DOI:
- 10.2136/sssaj2016.08.0254
- https://dx.doi.org/10.2136/sssaj2016.08.0254
- Author:
- Dungan, Robert S.
- Source:
- Environment international 2012 v.41 pp. 8
- ISSN:
- 0160-4120
- Subject:
- Actinobacteria; DNA; Proteobacteria; aerosols; airborne microorganisms; animal manures; bacteria; clones; dairies; dairy cows; emissions; feces; free range husbandry; human health; nucleotide sequences; pathogens; rumen; samplers; sequence homology; sprinkler irrigation; wastewater irrigation; zoonoses
- Abstract:
- ... Animal manures are known to harbor a variety of zoonotic pathogens, which are suspected of being transported off-site as aerosols from confined feeding operations. In this study, aerosols were collected using a high-volume sampler downwind from a 10,000 cow open-freestall dairy and nearby fields being sprinkler irrigated with wastewater. DNA extracts were prepared from the aerosol samples, then a ...
- Handle:
- 10113/55017
- DOI:
- 10.1016/j.envint.2011.12.004
- http://dx.doi.org/10.1016/j.envint.2011.12.004
- Author:
- Dungan, Robert S., et al. ; Leytem, April B.; Show all 2 Author
- Source:
- Journal of environmental quality 2014 v.43 no.4 pp. 1101-1110
- ISSN:
- 0047-2425
- Subject:
- Long-Term Agroecosystem Research Network; air quality; ammonia; animal housing; anthropogenic activities; databases; emissions factor; farms; feeding methods; greenhouse gases; land application; livestock; livestock production; manure spreading; particulate emissions; pollutants; production technology
- Abstract:
- ... Ammonia, greenhouse gases, and particulate emissions from livestock operations can potentially affect air quality at local, regional, and even global scales. These pollutants, many of which are generated through various anthropogenic activities, are being increasingly scrutinized by regulatory authorities. Regulation of emissions from livestock production systems will ultimately increase on farm c ...
- DOI:
- 10.2134/jeq2014.06.0264
- https://dx.doi.org/10.2134/jeq2014.06.0264
- Author:
- Dungan, Robert S.
- Source:
- Journal of occupational and environmental hygiene 2011 v.8 no.3 pp. 147–153
- Subject:
- endotoxins; airborne microorganisms; indoor environmental quality; kinetics; aerosols; samplers; animal housing; wastewater treatment; filters; air pollution; dairy farming; barns; farrowing; swine; occupational exposure
- Abstract:
- ... Airborne endotoxins in occupational environments are a potential respiratory hazard to individuals. In this study, airborne endotoxins were collected using open-face and button aerosol samplers from inside animal housing units and downwind from agricultural production sites and a wastewater treatment plant. Filter extracts were then diluted to examine the effect of interfering substances on the ki ...
- Handle:
- 10113/48558
- DOI:
- 10.1080/15459624.2011.555256
- http://dx.doi.org/10.1080/15459624.2011.555256
- Author:
- Dungan, Robert S., et al. ; Bougouin, Adeline; Leytem, April; Dijkstra, Jan; Kebreab, Ermias; Show all 5 Authors
- Source:
- Journal of environmental quality 2016 v.45 no.4 pp. 1123-1132
- ISSN:
- 0047-2425
- Subject:
- United States Environmental Protection Agency; ammonia; barns; cattle housing; crude protein; dairy cows; data analysis; dry matter accumulation; dry matter intake; emissions; environmental factors; excretion; humans; inventories; manure handling; meta-analysis; milk consumption; milk yield; models; nitrogen; nitrous oxide; odors; prediction; urine; United States
- Abstract:
- ... Nitrogen excreted in dairy manure can be potentially transformed and emitted as NH₃, which can create livestock and human respiratory problems and be an indirect source of N₂O. The objectives of this study were to: (i) investigate environmental factors influencing NH₃ emissions from dairy housing; and (ii) identify key explanatory variables in the NH₃ emissions prediction from dairy housing using ...
- Handle:
- 10113/62935
- DOI:
- 10.2134/jeq2015.07.0389
- https://dx.doi.org/10.2134/jeq2015.07.0389
- Author:
- Dungan, Robert S., et al. ; Leytem, April B.; Show all 2 Author
- Source:
- Journal of environmental quality 2013 v.42 no.5 pp. 1583
- ISSN:
- 0047-2425
- Subject:
- Actinobacteria; Archaea; DNA; DNA libraries; DNA primers; Proteobacteria; bacteria; cattle; clones; dairies; feces; genes; methanogens; nucleotide sequences; ribosomal RNA; rumen; species diversity; waste lagoons; wastewater
- Abstract:
- ... Dairy wastewaters from storage ponds are commonly land applied to irrigate forage crops. Given that diverse microbial populations are associated with cattle feces, the objective of this study was to use a culture-independent approach to characterize bacteria and archaea in dairy wastewaters. Using domain-specific primers, a region of the 16S rRNA gene was amplified from pooled DNA extracts from 30 ...
- Handle:
- 10113/57710
- DOI:
- 10.2134/jeq2013.04.0134
- https://dx.doi.org/10.2134/jeq2013.04.0134
- Author:
- Dungan, Robert S., et al. ; Miguel, Roberto E.; Reeves, James B.; Show all 3 Authors
- Source:
- Journal of analytical and applied pyrolysis 2014 v.107 pp. 332-335
- ISSN:
- 0165-2370
- Subject:
- aluminum; carbon; iron; pyrolysis; sand; soil; spectral analysis; spectroscopy; temperature; urethane; wastes
- Abstract:
- ... Foundries around the world discard millions of tons of sand each year even though they can be beneficially used in manufactured soils and geotechnical applications. Despite their usefulness as an aggregate replacement, some environmental authorities are concerned over potential negative impacts associated with residual organic binders in waste foundry sands (WFSs). In this study, chemically bound ...
- DOI:
- 10.1016/j.jaap.2014.02.007
- http://dx.doi.org/10.1016/j.jaap.2014.02.007
- Author:
- Dungan, Robert S., et al. ; Rothrock, Michael J.; Keen, Patricia L.; Cook, Kimberly L.; Durso, Lisa M.; Franklin, Alison M.; Show all 6 Authors
- Source:
- Journal of environmental quality 2016 v.45 no.2 pp. 420-431
- ISSN:
- 0047-2425
- Subject:
- agroecosystems; antibiotic resistance; bacteria; decision support systems; environmental health; monitoring; risk; terminology
- Abstract:
- ... Although historically, antibiotic resistance has occurred naturally in environmental bacteria, many questions remain regarding the specifics of how humans and animals contribute to the development and spread of antibiotic resistance in agroecosystems. Additional research is necessary to completely understand the potential risks to human, animal, and ecological health in systems altered by antibiot ...
- DOI:
- 10.2134/jeq2015.06.0327
- https://dx.doi.org/10.2134/jeq2015.06.0327
- Author:
- Dungan, Robert S.
- Source:
- Journal of residuals science & technology 2008 v.5 no.3 pp. 111
- Subject:
- soil pollution; heavy metals; metallurgy; sand; industrial wastes; polycyclic aromatic hydrocarbons; leaching; United States; Canada
- Abstract:
- ... Millions of tons of spent sand, used to create metal casting molds, are generated by the foundry industry each year in the United States. Not surprisingly, spent foundry sands (SFSs) are an excellent substitute for virgin sands that are currently used in manufactured soils and geotechnical applications. The purpose of this study was to characterize trace metals and EPA-priority polycyclic aromatic ...
- Handle:
- 10113/27497
- Author:
- Dungan, Robert S., et al. ; Leytem, April B.; Show all 2 Author
- Source:
- Journal of environmental quality 2011 v.40 no.2 pp. 462
- ISSN:
- 1537-2537
- Subject:
- dairies; concentrated animal feeding operations; airborne transmission; endotoxins; prediction; mathematical models; wind direction; wind speed; animal behavior; Idaho
- Abstract:
- ... Endotoxins are derived from gram-negative bacteria and are a potent inducer of inflammatory reactions in the respiratory tract when inhaled. To assess daily fluctuations of airborne endotoxin and their potential for transport from dairies, endotoxin concentrations were monitored over an 8-h period at upwind (background) and downwind (5 m from edge of dairy) locations on three separate days at two ...
- Handle:
- 10113/49274
- DOI:
- 10.2134/jeq2010.0363
- https://dx.doi.org/10.2134/jeq2010.0363
- Author:
- Dungan, Robert S., et al. ; Klein, Marcus; Leytem, April B.; Show all 3 Authors
- Source:
- Applied and environmental microbiology 2012 v.78 no.22 pp. 8089
- ISSN:
- 0099-2240
- Subject:
- Campylobacter jejuni; Cryptosporidium; DNA; Escherichia coli; Giardia; Leptospira; Listeria monocytogenes; Mycobacterium avium subsp. paratuberculosis; Salmonella enterica; Yersinia pseudotuberculosis; dairy industry; detection limit; pathogens; polymerase chain reaction; ponds; risk; sampling; wastewater; Idaho
- Abstract:
- ... Zoonotic pathogens in land-applied dairy wastewaters are a potential health risk. The occurrence and abundance of 10 pathogens and 3 fecal indicators were determined by quantitative real-time PCR (qPCR) in samples from 30 dairy wastewaters from southern Idaho. Samples tested positive for Campylobacter jejuni, stx(1)- and eaeA-positive Escherichia coli, Listeria monocytogenes, Mycobacterium avium s ...
- Handle:
- 10113/57926
- DOI:
- 10.1128/AEM.02470-12
- PubMed:
- 22983964
- PubMed Central:
- PMC3485929
- http://dx.doi.org/10.1128/AEM.02470-12
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