Featured Research

from universities, journals, and other organizations

Bacterial Persistence In Streams

Date:
August 6, 2008
Source:
American Society of Agronomy
Summary:
Ecological researchers have completed a study on an East Tennessee river to determine the connection between watershed hydrology and fecal bacteria statistical time series analysis. A new article presents a study of the temporal patterns and statistical persistence of total coliform based on data gathered from the Little River near an intake at a public water supply plant.

A research team from the University of Tennessee (UT) has completed a study on an East Tennessee river to determine the connection between watershed hydrology and fecal bacteria statistical time series analysis.

Related Articles


Shesh Koirala and colleagues report their findings in the Journal of Environmental Quality. The article presents a study of the temporal patterns and statistical persistence of total coliform based on data gathered from the Little River near an intake at a public water supply plant.

The presence of bacteria from fecal pollution continues to be a problem in both rural and urban streams in the United States. Since 1990, when the U.S. EPA adopted the Coliform Rule, the presence of total coliform in water distribution systems has been closely monitored as an indicator of fecal pollution and possible bacterial or viral enteric pathogens. Many public water supply operations have monitored total coliform presence in streams near water intakes to assess the quality of the water prior to treatment.

Coliform bacteria are often present in nature, however bacteria in certain streams, particularly total coliform, may indicate on-going and ever-present issues related to fecal pollution and bacterial transport within watersheds. The UT research team investigated the temporal relationship between watershed processes and the presence of bacteria to better determine management needs related to potential pollution sources.

For the UT study, daily samples were collected from the Little River by water plant personnel, and the time series was analyzed to determine the persistence of total coliform in the stream. The analysis included both time-domain and frequency-domain approaches for comparison purposes. Koirala’s team discovered that total coliform bacteria exhibit both short-term and long-term persistence at four-week and one-year intervals. Comparison of the total coliform time series with hydrologic data indicated that short-term persistence is dominated by runoff events, whereas longer-term persistence is likely related to baseflow, or groundwater, supply.

The UT research team’s study will help scientists develop better conceptual models and provide direct benefit to local communities contending with fecal pollution. The UT team has been working closely with regional watershed groups to facilitate technology transfer and guide use of these data in managing watersheds. The researchers continue to build upon this study, as well as previous efforts, to devise better tools for quantifying fecal bacteria loads and defining temporal behavior in hydrologic watershed processes. These outcomes will assist local communities in improving management of their water supplies.

The research was funded by UT’s Center for Environmental Biotechnology.


Story Source:

The above story is based on materials provided by American Society of Agronomy. Note: Materials may be edited for content and length.


Journal Reference:

  1. Koirala et al. Temporal Variation and Persistence of Bacteria in Streams. Journal of Environmental Quality, 2008; 37 (4): 1559 DOI: 10.2134/jeq2007.0310

Cite This Page:

American Society of Agronomy. "Bacterial Persistence In Streams." ScienceDaily. ScienceDaily, 6 August 2008. <www.sciencedaily.com/releases/2008/08/080805150810.htm>.
American Society of Agronomy. (2008, August 6). Bacterial Persistence In Streams. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2008/08/080805150810.htm
American Society of Agronomy. "Bacterial Persistence In Streams." ScienceDaily. www.sciencedaily.com/releases/2008/08/080805150810.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Antarctic Sea Ice Mystery Thickens... Literally

Antarctic Sea Ice Mystery Thickens... Literally

Newsy (Nov. 25, 2014) — Antarctic sea ice isn't only expanding, it's thicker than previously thought, and scientists aren't sure exactly why. Video provided by Newsy
Powered by NewsLook.com
3D Map of Antarctic Sea Ice to Shed Light on Climate Change

3D Map of Antarctic Sea Ice to Shed Light on Climate Change

Reuters - Innovations Video Online (Nov. 24, 2014) — A multinational group of scientists have released the first ever detailed, high-resolution 3-D maps of Antarctic sea ice. Using an underwater robot equipped with sonar, the researchers mapped the underside of a massive area of sea ice to gauge the impact of climate change. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Car Park Solution for Flexible Green Energy

Car Park Solution for Flexible Green Energy

Reuters - Innovations Video Online (Nov. 24, 2014) — A British solar power start-up says that by covering millions of existing car park spaces around the UK with flexible solar panels, the country's power problems could be solved. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Yellow-Spotted Turtles Rescued from Trafficking

Yellow-Spotted Turtles Rescued from Trafficking

Reuters - Light News Video Online (Nov. 24, 2014) — Hundreds of Amazon River turtles released into the wild in Peru. Sharon Reich reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins