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:3/7/2017)... , March 7, 2017   HireVue , ... top global companies identify the best talent, faster, today ... Chief Sales Officer (CSO) and Diana Kucer ... round out a seasoned executive team poised to drive continued ... building on a year of record bookings in 2017. ...
(Date:3/2/2017)... 2017 Summary This report provides ... KGaA and its partnering interests and activities since 2010. ... Description The Partnering Deals and Alliance since 2010 report ... one of the world,s leading life sciences companies. ... to ensure inclusion of the most up to date ...
(Date:3/1/2017)... BEDFORD, Mass. , March 1, 2017  Aware, ... and services, announced that Richard P. Moberg ... Officer and co-President and Chief Financial Officer and Treasurer ... will continue to serve as a member of the ... T. Russell , Aware,s co-Chief Executive Officer and co-President, ...
Breaking Biology News(10 mins):
(Date:3/23/2017)... , March 23, 2017  SeraCare ... to global in vitro diagnostics manufacturers and ... the industry,s first multiplexed Inherited Cancer ... testing by next-generation sequencing (NGS). The Seraseqâ„¢ ... developed with input from industry experts to ...
(Date:3/23/2017)... 2017 NetworkNewsWire Editorial Coverage  ... Cancer remains one ... on health care systems, in terms of costs and resources. ... does the development of innovative and efficient therapies that demonstrate ... many types of cancer treatments, a growing number of patients ...
(Date:3/22/2017)... 2017 Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN), today announced ... U.K. Biobank and GSK to generate genetic sequence data from ... initiative will enable researchers to gain valuable insights to support ... range of serious and life threatening diseases. ... Genetic evidence has ...
(Date:3/22/2017)... 2017 Oramed Pharmaceuticals Inc. (NASDAQ: ... ), a clinical-stage pharmaceutical company focused ... announced today that Dr. Miriam Kidron , ... titled, "Oral Insulin for Diabetes Treatment: Bypassing the ... and Peptide Therapeutics (OPT) Boston Conference in ...
Breaking Biology Technology: