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.

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 August 20, 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 August 20, 2014).

Share This




More Earth & Climate News

Wednesday, August 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

AFP (Aug. 19, 2014) A solar cell that resembles a flower is offering a new take on green energy in Japan, where one scientist is searching for renewables that look good. Duration: 01:29 Video provided by AFP
Powered by NewsLook.com
Disquieting Times for Malaysia's 'fish Listeners'

Disquieting Times for Malaysia's 'fish Listeners'

AFP (Aug. 19, 2014) Malaysia's last "fish listeners" -- practitioners of a dying local art of listening underwater to locate their quarry -- try to keep the ancient technique alive in the face of industrial trawling and the depletion of stocks. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com
Wildfire Hits California's Angeles National Forest

Wildfire Hits California's Angeles National Forest

Reuters - US Online Video (Aug. 17, 2014) A wildfire sweeps across the Angeles National Forest prompting campers to quickly leave as officials began evacuating the area -- local media. Gavino Garay reports. Video provided by Reuters
Powered by NewsLook.com
Symphony Performs at Southern Utah's Red Rocks

Symphony Performs at Southern Utah's Red Rocks

AP (Aug. 16, 2014) The Utah Symphony hopes to complement the beauty of Utah's soaring red rocks and canyons with free desert performances near Utah's national parks this weekend. (Aug. 16) Video provided by AP
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:
from the past week

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