Featured Research

from universities, journals, and other organizations

Animal Wastes Or Sewage Contribute To Salmon Migration Barrier In San Joaquin River

Date:
March 1, 2004
Source:
U.S. Geological Survey
Summary:
Migrating fall-run Chinook salmon can hit a stretch of the San Joaquin River in Central California with oxygen levels so low, the fish are forced to either wait around until conditions improve or to go elsewhere to spawn, thereby negatively affecting their spawning success.

Migrating fall-run Chinook salmon can hit a stretch of the San Joaquin River in Central California with oxygen levels so low, the fish are forced to either wait around until conditions improve or to go elsewhere to spawn, thereby negatively affecting their spawning success. Algae consume much of the oxygen and according to a recently published U.S. Geological Survey (USGS) report, animal wastes or sewage were a major source of nutrients for the algae growth.

Related Articles


“Whereas tributaries were important sources of nutrients and organic carbon in the San Joaquin River, they were a relatively minor source of algae” said the report’s lead author, Charles Kratzer, a USGS hydrologist. "Nitrate was an important nutrient source for the algae growth in the San Joaquin River and the isotopic signature of the nitrate in the river suggested that animal waste or sewage was a significant source of the nitrate at the time of sampling."

Samples were collected in the summer and fall of 2000 and 2001 at 7 sites on the San Joaquin River in the Sacramento-San Joaquin Delta and 14 sites on tributaries. Analyses of the samples looked at nutrients, organic carbon, chlorophyll-a, and isotopes of carbon, nitrogen, and oxygen in the water and in the particulate organic matter.

The California Department of Water Resources and the CALFED Bay-Delta Program funded the USGS study to provide additional information to the Central Valley Regional Water Quality Control Board for their development of a Total Maximum Daily Load regulation for dissolved oxygen levels in the Stockton Deep Water Ship Channel. The sampling in this study was coordinated with a study done by the University of California at Davis (UCD). The U.S. Fish and Wildlife Service funded the UCD study to evaluate the food resources to the Sacramento-San Joaquin Delta from the Sacramento and San Joaquin Basins. The UCD data is included and interpreted in the USGS report.

The USGS report entitled, “Sources and Transport of Nutrients, Organic Carbon, and Chlorophyll-a in the San Joaquin River Upstream of Vernalis, California, during Summer and Fall, 2000 and 2001,” by Charles R. Kratzer, Peter D. Dileanis, Celia Zamora, Steven R. Silva, Carol Kendall, Brian A. Bergamaschi, and Randy A. Dahlgren, can be found on the web at http://water.usgs.gov/pubs/wri/wri034127/

The USGS serves the nation by providing reliable scientific information to describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life.


Story Source:

The above story is based on materials provided by U.S. Geological Survey. Note: Materials may be edited for content and length.


Cite This Page:

U.S. Geological Survey. "Animal Wastes Or Sewage Contribute To Salmon Migration Barrier In San Joaquin River." ScienceDaily. ScienceDaily, 1 March 2004. <www.sciencedaily.com/releases/2004/02/040229233244.htm>.
U.S. Geological Survey. (2004, March 1). Animal Wastes Or Sewage Contribute To Salmon Migration Barrier In San Joaquin River. ScienceDaily. Retrieved March 6, 2015 from www.sciencedaily.com/releases/2004/02/040229233244.htm
U.S. Geological Survey. "Animal Wastes Or Sewage Contribute To Salmon Migration Barrier In San Joaquin River." ScienceDaily. www.sciencedaily.com/releases/2004/02/040229233244.htm (accessed March 6, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Friday, March 6, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

'Extinct' Bird Isn't Extinct At All, Scientists Find

'Extinct' Bird Isn't Extinct At All, Scientists Find

Buzz60 (Mar. 6, 2015) — Scientists rediscover a bird thought to be extinct, so we may be able to cross it off the "Gone For Good" list. Sean Dowling (@seandowlingtv) has more details. Video provided by Buzz60
Powered by NewsLook.com
China's Toxic Truth Goes Viral

China's Toxic Truth Goes Viral

Reuters - Business Video Online (Mar. 6, 2015) — Pollution in China has gone viral with a documentary highlighting the problems caused by major industries. But awareness may not be enough to clean up dirty producers. Jane Lanhee Lee reports. Video provided by Reuters
Powered by NewsLook.com
Lack of Snow Pushes Alaska Sled Dog Race North

Lack of Snow Pushes Alaska Sled Dog Race North

AP (Mar. 6, 2015) — A shortage of snow has forced Alaska&apos;s Iditarod Trail Sled Dog Race to move 300 miles north to Fairbanks. The ceremonial start through downtown Anchorage will take place this weekend, using snow stockpiled earlier this winter. (March 6) Video provided by AP
Powered by NewsLook.com
Why Were El Niño Predictions So Far Off Base?

Why Were El Niño Predictions So Far Off Base?

Newsy (Mar. 5, 2015) — Weather agencies say an El Niño event is officially underway, but they called for it months ago and warned it would be way stronger than it is. Video provided by Newsy
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