Navigation Links
Urban impacts on phosphorus in streams
Date:8/11/2011

MADISON, WI, JULY 11, 2011 -- 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. 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.


'/>"/>

Contact: Sara Uttech
suttech@sciencesocieties.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

Related biology news :

1. Re-inventing Americas urban water infrastructure
2. Models show Coho salmon at risk in US urbanizing watersheds
3. Soil samples reveal urban mercury footprints
4. Landscape coefficients prove useful for urban water conservation efforts
5. Dairy manure goes urban
6. Study finds widespread stream biodiversity declines at low levels of urban development
7. UF study finds cats No. 1 predator to urban mockingbird nests
8. UCSB urban ecosystem research featured in leading ecology journal
9. Large differences in mortality between urban and isolated rural areas
10. Nottingham researchers help bridge the urban and rural divide in the UK and India
11. Archaeologists explore Iraqi marshes for origins of urbanization
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/8/2017)... 2017 The biometrics market has reached ... of organizations, desires to better authenticate or identify ... and challenge questions), biometrics is quickly working its ... market is driven by use cases, though there ... enterprise uses cases, with consumer-facing use cases encompassing ...
(Date:2/6/2017)... , Feb. 6, 2017 According to ... are driving border authorities to continue to embrace ... there are 2143 Automated Border Control (ABC) eGates ... deployed at more than 163 ports of entry ... to 2016 achieving a combined CAGR of 37%. ...
(Date:2/2/2017)... 1, 2017  Central to its deep commitment ... worldwide, The Japan Prize Foundation today announced the ... pushed the envelope in their respective fields of ... scientists are being recognized with the 2017 Japan ... only contribute to the advancement of science and ...
Breaking Biology News(10 mins):
(Date:2/16/2017)... ... ... EIT Digital has launched work to develop a new Smart IOT ... to get under way for the framework, which is designed to reduce the use ... to be transferred eventually to other industries that also require efficient IoT and management ...
(Date:2/16/2017)... , Feb. 16, 2017  MDNA Life ... the development of liquid biopsy tests based on ... into an exclusive license agreement with its first ... proprietary liquid biopsy test for prostate cancer, the ... Korea . This is the first overseas ...
(Date:2/16/2017)... Feb. 16, 2017   Biostage, Inc. (Nasdaq: ... biotechnology company developing bioengineered organ implants to treat cancers ... trachea, announced today the closing on February 15, 2017 ... of common stock and warrants to purchase 20,000,000 shares ... million. The offering was priced at $0.40 per share ...
(Date:2/16/2017)... N.J. , Feb. 16, 2017  Champions Oncology, ... in the development and sale of advanced technology solutions ... oncology drugs, today announced the addition of new cohorts ... These new models will expand Champions, product line ... head and neck cancer, AML, and non-small cell lung ...
Breaking Biology Technology: