Navigation Links
Increase in metal concentrations in Rocky Mountain watershed tied to warming temperatures
Date:9/10/2012

Warmer air temperatures since the 1980s may explain significant increases in zinc and other metal concentrations of ecological concern in a Rocky Mountain watershed, reports a new study led by the U.S. Geological Survey and the University of Colorado Boulder.

Rising concentrations of zinc and other metals in the upper Snake River just west of the Continental Divide near Keystone, Colo., may be the result of falling water tables, melting permafrost and accelerating mineral weathering rates, all driven by warmer air temperatures in the watershed. Researchers observed a fourfold increase in dissolved zinc over the last 30 years during the month of September.

Increases in metals were seen in other months as well, with lesser increases seen during the high-flow snowmelt period. During the study period, local mean annual and mean summer air temperatures increased at a rate of 0.5 to 2.2 degrees Fahrenheit per decade.

Generally, high concentrations of dissolved metals in the Snake River watershed are primarily the result of acid rock drainage, or ARD, formed by natural weathering of pyrite and other metal-rich sulfide minerals in the bedrock. Weathering of pyrite forms sulfuric acid through a series of chemical reactions, and pulls metals like zinc from minerals in the rock and carries these metals into streams.

Increased sulfate and calcium concentrations observed over the study period lend weight to the hypothesis that the increased zinc concentrations are due to acceleration of pyrite weathering. The potential for comparable increases in metals in similar Western watersheds is a concern because of impacts on water resources, fisheries and stream ecosystems. Trout populations in the lower Snake River, for example, appear to be limited by the metal concentrations in the water, said USGS research biologist Andrew Todd, lead researcher on the project.

"Acid rock drainage is a significant water quality problem facing much
'/>"/>

Contact: Diane McKnight
Diane.McKnight@colorado.edu
303-492-4687
University of Colorado at Boulder
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Increase in Arctic shipping poses risk to marine mammals
2. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
3. Fertilizer use responsible for increase in nitrous oxide in atmosphere
4. NIST/UMass study finds evidence nanoparticles may increase plant DNA damage
5. Study finds soda consumption increases overall stroke risk
6. Scientists have discovered genes that increase the risk of osteoporosis and fractures
7. Family history of liver cancer increases risk of developing the disease
8. Research shows how PCBs promote dendrite growth, may increase autism risk
9. Increased fructose consumption may deplete cellular energy in patients with obesity and diabetes
10. NIH-led study finds genetic test results do not trigger increased use of health services
11. Flapping protective wings increase lift
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/23/2014)... French and German . ... other mammals, the difference between sexes depends on one single element ... males, where the two sexual chromosomes are X and Y, whereas ... for all the morphological and physiological differences between males and females. ... long time ago, the X and Y were identical, until the ...
(Date:4/23/2014)... their mid-thirties and forties, face a devastating prognosis: ... decades. "Mutant" protein clusters, long blamed for the ... primary focus of therapies in development by pharmaceutical ... Gerardo Lederkremer and Dr. Julia Leitman of Tel ... in collaboration with Prof. Ulrich Hartl of the ...
(Date:4/23/2014)... (Apr. 23 2014) A team of ... cells (hNSCs) into the brains of nonhuman primates ... and 24 months found that the hNSCs had ... not cause tumors. , The study will be ... Transplantation but is currently freely available on-line ...
Breaking Biology News(10 mins):Male or female? 2Male or female? 3On the defensive 2On the defensive 3Study finds long-term survival of human neural stem cells transplanted into primate brain 2
... from males can damage relationships between females is revealed in ... Centre for Research in Animal Behaviour at the University of ... B , the research uncovers the effect of sexual harassment ... with each other. The study focused on guppies, a ...
... 2009Exploring the psychology of human-nature relationships and understanding the ... at the core of the evolving discipline called ecopsychology ... journal, Ecopsychology , published by Mary Ann Liebert, ... free online at www.liebertpub.com/eco The goal ...
... has announced the university teams who won the annual ... award competition encourages college students to apply technology in ... designs must be economically profitable, which is why each ... designs. "Scientific innovation has long been a ...
Cached Biology News:Sexual harassment from males prevents female bonding, says study 2Premier issue of Ecopsychology launched by Mary Ann Liebert Inc. publishers 2Premier issue of Ecopsychology launched by Mary Ann Liebert Inc. publishers 3EPA's P3 award winners celebrate a green future 2
(Date:1/14/2014)... DC (PRWEB) January 14, 2014 Carahsoft ... for Thursday, January 23, 2014 at 2pm EST (11am ... Knowledge.” The topic focuses on how technology can turn ... critical decisions for government agencies. The online webinar will ...
(Date:1/14/2014)... 2014 The largest international professional organization of ... therapeutic derivatives thereof has endorsed an educational program ... the challenges of adulterated herb and botanical products. ... The Society for Medicinal Plant and Natural ...
(Date:1/14/2014)... Global Record Systems, LLC, (GRS), ... solutions for patients, physicians, the biopharmaceutical industry, regulators, ... the signing of a three-year Research Collaboration Agreement ... (FDA). This initiative is designed to generate ...
(Date:1/14/2014)... CA (PRWEB) January 14, 2014 Independent ... County), California, and Montreal, Canada, has big ideas for ... non-fiction. The press's goals are to produce high-quality, low-cost, ... to support local businesses. , The first major ...
Breaking Biology Technology:Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8Global Record Systems Announces Research Collaboration Agreement with FDA to Create a Novel “Big Data” Paradigm for Collection of Patient Safety and Outcomes Information 2Bitingduck Press Looks Forward to 2014 With Multimedia E-books 2
... -- GE Healthcare reported Monday that it ... Virginia Health System to develop new, minimally ... will use GE Healthcare's surgical navigation tools, the InstaTrak ... invasive methods of therapeutic and surgical intervention for the ...
... - Gov. Jim Doyle on Monday expressed hope ... Majority Leader Bill Frist's recent decision to support removal ... , ,Doyle made his comments at the groundbreaking of ... also praised Wisconsin's medical development scene. , ,In remarks ...
... -- Dr. Carlos Perez has been appointed to the ... Madison. Perez is a former president of the American ... years of experience in radiation oncology. , ,Perez ... at Mallinckrodt Institute of Radiology, Siteman Cancer Center, Washington ...
Cached Biology Technology:Doyle praises Frist's new stem cell research position 2Doyle praises Frist's new stem cell research position 3