Featured Research

from universities, journals, and other organizations

Urban impacts on phosphorus in streams

Date:
August 11, 2011
Source:
American Society of Agronomy
Summary:
Scientists have investigated the link between human sources of phosphorus and phosphorus concentrations in rivers draining into California's Central Valley.

Although phosphorus is an essential nutrient for all life forms, essential amounts of the chemical element can cause water quality problems in rivers, lakes, and coastal zones. High concentrations of phosphorus in aquatic ecosystems are often associated with human activities in the surrounding area, such as agriculture and urban development. However, relationships between specific human sources of phosphorus and phosphorus concentrations in aquatic ecosystems are yet to be understood.

Related Articles


Establishing these relationships could allow for the development, implementation, and evaluation of management strategies to reduce nutrient pollution.

Scientists from Washington State University-Vancouver and the University of California-Davis have investigated the link between human sources of phosphorus and phosphorus concentrations in rivers draining into California's Central Valley. Agricultural activity and human population density data was used to estimate the annual input of phosphorus from human sources to watersheds in the Central Valley for the early 2000s. The scientists then compared these estimates with data on phosphorus concentrations in rivers draining the watersheds from 2000 to 2003. Results from the study were published in the August issue of the Journal of Environmental Quality.This study was funded by California SeaGrant, the US Geological Survey, and NASA.

The research revealed that the majority of phosphorus input from human sources was located in a very small area in most of the river basins studied. Additionally, estimates of phosphorus inputs from fertilizer and livestock manure, rather than phosphorus input from human sewage, better predicted dissolved forms of phosphorus in rivers than generic data on agricultural and urban land use types in watersheds. The form of phosphorus in rivers is important, as different forms can have different environmental impacts.

"Establishing relationships between human sources of nutrients and nutrient concentrations in rivers is of interest because they may help to develop management strategies for reducing nutrient runoff to the environment," said Dan Sobota, who conducted the study along with John Harrison and Randy Dahlgren.

Research is ongoing at Washington State University-Vancouver and the University of California to find the link between human sources of nutrients in watersheds and aquatic nutrient levels.Further research is needed to examine how relationships between human sources of nutrients and aquatic nutrient concentrations change in other regions, and with different types of land use practices.

Article.


Story Source:

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


Cite This Page:

American Society of Agronomy. "Urban impacts on phosphorus in streams." ScienceDaily. ScienceDaily, 11 August 2011. <www.sciencedaily.com/releases/2011/08/110811141248.htm>.
American Society of Agronomy. (2011, August 11). Urban impacts on phosphorus in streams. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2011/08/110811141248.htm
American Society of Agronomy. "Urban impacts on phosphorus in streams." ScienceDaily. www.sciencedaily.com/releases/2011/08/110811141248.htm (accessed October 24, 2014).

Share This



More Earth & Climate News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

EU Gets Climate Deal, UK PM Gets Knock

EU Gets Climate Deal, UK PM Gets Knock

Reuters - Business Video Online (Oct. 24, 2014) EU leaders achieve a show of unity by striking a compromise deal on carbon emissions. But David Cameron's bid to push back EU budget contributions gets a slap in the face as the European Commission demands an extra 2bn euros. David Pollard reports. Video provided by Reuters
Powered by NewsLook.com
Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Raw: Tornado Rips Roofs in Washington State

Raw: Tornado Rips Roofs in Washington State

AP (Oct. 24, 2014) A rare tornado ripped roofs off buildings, uprooted trees and shattered windows Thursday afternoon in the southwest Washington city of Longview, but there were no reports of injuries. (Oct. 24) Video provided by AP
Powered by NewsLook.com
Fast-Moving Lava Headed For Town On Hawaii's Big Island

Fast-Moving Lava Headed For Town On Hawaii's Big Island

Newsy (Oct. 24, 2014) Lava from the Kilauea volcano on Hawaii's Big Island has accelerated as it travels toward a town called Pahoa. 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