Navigation Links
CEAP study examines nitrogen, copper levels in Bay watershed
Date:8/20/2010

This release is available in Spanish.

A comprehensive study of pollutants in a major Chesapeake Bay tributary revealed troublesome levels of nitrogen and copper that could flow into the Bay, according to U.S. Department of Agriculture (USDA) scientists and their cooperators.

Scientists with USDA's Agricultural Research Service (ARS) and their collaborators conducted the study as part of the Conservation Effects Assessment Project (CEAP) for Maryland's Choptank River Watershed, which flows into the Chesapeake Bay. CEAP began in 2004 and focuses on the effects of conservation practices and Farm Bill conservation programs on 37 watersheds nationwide.

Greg McCarty, a soil scientist with the ARS Hydrology and Remote Sensing Laboratory at Beltsville, Md., and Laura McConnell, a chemist at the ARS Environmental Management and Byproducts Utilization Laboratory in Beltsville, lead the team's CEAP Choptank project. ARS is USDA's principal intramural scientific research agency.

Monitoring the Choptank provides information needed to develop new conservation practices, refine existing ones, and design programs to evaluate efforts to clean the endangered Bay.

Sampling the water every two months for three years, the scientists found that nitrate concentrations often exceeded levels that can cause algal blooms. Nitrate concentrations were highest at the headwaters where farming is concentrated, suggesting that agricultural fertilizers, including manure and poultry litter, are primary sources.

But phosphorus concentrations were similar throughout the river, suggesting multiple sources. While some evidence points to wastewater treatment plants as a likely primary source, agriculture is also a major contributor.

High copper concentrations were found in almost all samples at the lower reaches of the Choptank, but not in the upstream areas. This suggests that agriculture is not the primary source. The levels were high enough to be toxic to clams and other aquatic invertebrates that help feed and filter the Bay.

Herbicides and their byproducts were present year-round. Concentrations did not approach established levels of concern for aquatic organisms. Still, this research shows the importance of agricultural practices that reduce herbicide losses, particularly from springtime applications.

The results of this study were published in the journal Science of the Total Environment.


'/>"/>

Contact: Don Comis
donald.comis@ars.usda.gov
301-504-1625
United States Department of Agriculture-Research, Education, and Economics
Source:Eurekalert

Related biology news :

1. CCNY biologists study rainforest host-plant associations
2. Study explains why Alzheimers drug is both safe and effective
3. Study shows genes role in developing and maintaining cells key for a lifetime of memories
4. Grant to study effects of oil and dispersants on Louisiana salt marsh ecosystem
5. Blood stem cell, leukemia link illuminated in UCSF-led study
6. Landmark dental school study uses genetic test to help predict gum disease
7. Illinois researchers use pyrosequencing to study canine intestinal bacteria
8. Study to examine rising sea levels impact on estuaries, coastal communities
9. Tinnitus study looks for cure to ringing in the ears
10. Texas petrochemical emissions down, but still underestimated, says study
11. $22.5 million grant funds international study of membrane proteins
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/24/2016)... , Nov. 23, 2016 Cercacor today ... athletes and their trainers non-invasively measure hemoglobin, ... Pulse Rate, and Respiration Rate in approximately 30 seconds. ... users easy and immediate access to key data about ... of a training regimen. Hemoglobin carries ...
(Date:11/17/2016)... LONDON , Nov. 17, 2016 Global Market ... and Public Biobanks (Disease-Based Banks, Population-Based Banks and Academics) market ... Geographical analysis for Private Biobanks shows the highest Compounded Annual ... Asia-Pacific region during the analysis period 2014-2020. ... a CAGR of 9.95% followed by Europe ...
(Date:11/14/2016)... Technology, Inc. ("xG" or the "Company") (Nasdaq: XGTI, XGTIW), ... in challenging operating environments, announced its results for the ... a conference call to discuss these results on November ... Key Recent Accomplishments ... acquire Vislink Communication Systems. The purchase is expected to ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... DC (PRWEB) , ... December ... ... Consortiumâ„¢ (ETC), a consortium of pharmaceutical and biotechnology companies dedicated to collaboratively ... seeking companies interested in supplying a vendor-supported, portable online UHPLC, with robust, ...
(Date:12/2/2016)... The immunohistochemistry (IHC) market is projected ... of 7.3% during the forecast period of 2016 to 2021 dominated ... accounted for the largest share of immunohistochemistry (IHC) market, by end ... , , ... market spread across 225 pages, profiling 10 companies and supported with ...
(Date:11/30/2016)... announced the appointment of Joshua F. Coleman , M.D., ... Coleman will oversee clinical content development and curation of scientific ... suite empowers molecular pathologists with a seamless workflow for the ... quality control through reporting. ... , , Prior ...
(Date:11/30/2016)... , Nov. 30, 2016 Biotest Pharmaceuticals Corporation ... pleased to announce the addition of its newest plasma ... Kearney, Nebraska . The 15,200 square foot state-of-the-art ... 29th, 2016 and brings the total number of BPC,s ... Ileana Carlisle , BPC,s Chief Executive Officer said "We ...
Breaking Biology Technology: