U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            NINO DE GUZMAN, G - University Of Marylanditem
                                            Hapeman, Cathleenitem
                                            Shelton, Danielitem
                                            Rice, Clifforditem
                                            Codling, Etonitem
                                            Millner, Patriciaitem
                                            TORRENTS, A - University Of Maryland
  Submitted to: BARC Poster Day
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 3/14/2010
                                    Publication  Date: 4/21/2010
                                    Citation: Nino De Guzman, G., Hapeman, C.J., Shelton, D.R., Rice, C., Codling, E.E., Millner, P.D., Torrents, A. 2010. Relating stream microbial ecology to land-use in the Choptank River Watershed. BARC Poster Day.Interpretive Summary:
                                Technical Abstract: The Choptank River is an estuary and tributary on the Eastern Shore of the Chesapeake Bay whose mouth is a tidal embayment that spans 2057 km2.  Approximately 60% of land use in the Choptank River Watershed is agricultural, with large acreages of corn (Zea mays), soybean (Glycine max), wheat (Triticum aestivum), and barley (Hordeum vulgare).  Much of the grain production supports small- and medium-sized animal feeding operations, mostly poultry with some dairy and horse husbandry.  Manure from poultry houses is routinely recycled as a fertilizer on agricultural production fields.  The purpose of this work is to examine the type and extent of agriculturally-related chemicals downstream of a poultry operation and to assess whether the local agricultural activities influence the microbial ecology and the water quality of adjacent surface water.  The potential relative contributions of poultry production are compared to other agricultural contributions.  The effectiveness of mitigation practices used to prevent surface water contamination is also considered.  Water and sediment samples were analyzed for antibiotics, nutrients, pesticides, heavy metals, and certain pathogenic bacteria.  Other water quality parameters and flow data were also analyzed.  Preliminary results indicate that As and P concentrations are not influenced by the poultry facility during the summer and fall, and that higher nitrogen concentrations may be due to shallow groundwater table and historic use of fertilizer.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov