Navigation Links
Dartmouth researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem
Date:1/9/2008

A team of researchers, led by biologists at Dartmouth, has found potentially dangerous levels of mercury and arsenic in Lake Baiyangdian, the largest lake in the North China Plain and a source of both food and drinking water for the people who live around it.

The researchers studied three separate locations in Lake Baiyangdian, all at varying distances from major sources of pollution, such as coal emissions, agricultural runoff, and sewage discharge. They found concentrations of arsenic and mercury in fish were above the threshold considered by the U.S. Environmental Protection Agency (EPA) to pose a risk to humans and wildlife.

The findings were published online on Dec. 24, 2007, in the journal Water, Air, and Soil Pollution.

Its important to study this system because it is typical of many throughout China where human activity and industrialization are having detrimental effects on the environment with major human health implications, says Celia Chen 78, a research associate professor of biological sciences. It makes perfect sense to apply what were learning about lakes in the U.S. to other places in the world, like China, that have a growing global impact.

Chen and her team were curious to learn how arsenic and mercury, two toxic environmental metals, moved through the food web in a freshwater ecosystem known to be polluted and contaminated. In a process called bioaccumulation, mercury and arsenic were found throughout the food web, from the water, into the algae, through the tiny algae-eating zooplankton, to the fish. As expected, the researchers found that more nutrient-rich environments supported larger algal blooms, which resulted in lower concentrations of mercury and arsenic in the water due to uptake by the algae.

In their previous work, the researchers found that when there is a lot of algae present, mercury and arsenic are biodiluted, or more dispersed, so zooplankton that eat the algae are exposed to
'/>"/>

Contact: Sue Knapp
sue.knapp@dartmouth.edu
603-646-3661
Dartmouth College
Source:Eurekalert

Page: 1 2

Related biology news :

1. Dartmouth researchers show effects of low dose arsenic on development
2. Leading researchers and experts gather to discuss latest advancements in drug discovery
3. Medical breakthrough for organ transplants and cardiovascular diseases by Flemish researchers
4. Researchers uncover key trigger for potent cancer-fighting marine product
5. Worth a thousand words: Hopkins researchers paint picture of cancer-promoting culprit
6. Novel mechanism for long-term learning identified by Carnegie Mellon researchers
7. Cornell researchers prove how plants transport sugars
8. Researchers discover protein that controls bone growth
9. Dolphin therapy a dangerous fad, Emory researchers warn
10. ASU researchers use NASA satellites to improve pollution modeling
11. OHSU researchers reveal the science of shivering
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... If a restaurant ... he can expect his premises to be trashed. Warnings like ... is enough to make restaurant owners pay up. Similarly, mafia-like ... in other birds, nests. If the host birds throw the ... destroying the entire nest. Consequently, it is beneficial for hosts ...
(Date:4/17/2014)... IPCC meeting painted a stark warning on the possible ... a greenhouse effect 32 times that of carbon dioxide. ... humic substances act as fully regenerable electron acceptors which ... in wetlands instead of being released to the atmosphere. ... disrupted it may enter into a vicious cycle to ...
(Date:4/17/2014)... wild animals and plant life, but there,s an invisible ... in the soil, decomposing organic matter and releasing carbon ... fungi play in ecological systems, their identities have only ... generated a genetic map of more than 10,000 species ... this week in the Proceedings of the National ...
Breaking Biology News(10 mins):Fear of the cuckoo mafia 2Fear of the cuckoo mafia 3Methane climate change risk suggested by proof of redox cycling of humic substances 2Stanford biologists help solve fungal mysteries 2Stanford biologists help solve fungal mysteries 3
... on earth is threatened by chaos. In this sense, a ... sink in a sea of chaos. It must constantly consume ... going under metaphorically speaking, the infiltrating water of chaos ... Planck Institute of Molecular Physiology in Dortmund have now discovered ...
... 2010-Conventional agriculture production relies heavily on fossil fuels, particularly ... cost. However, the uncertain future of fossil fuel availability ... in other cropping systems. Most of the U.S. ... and soybean with heavy inputs of fertilizer, herbicides and ...
... April 28, 2010 In findings that could one day lead ... described some striking differences between the biochemistry of stem cells ... Associate Professor Sheng Ding and Senior Director of the Scripps ... an advance, online edition of the prestigious journal Nature ...
Cached Biology News:Transportation governed by simple rules 2Transportation governed by simple rules 3Transportation governed by simple rules 4Reducing fossil energy use on the farm 2Reducing fossil energy use on the farm 3Scripps Research team provides groundbreaking new understanding of stem cells 2Scripps Research team provides groundbreaking new understanding of stem cells 3
(Date:1/14/2014)... Carahsoft and CDS Federal Services have ... at 2pm EST (11am PST), “Natural Language Processing: Converting ... how technology can turn raw, heterogeneous data into actionable ... The online webinar will last approximately one hour. , ...
(Date:1/14/2014)... , Jan. 14, 2014 The largest ... research medicinal plants and therapeutic derivatives thereof has ... professionals, and researchers about the challenges of adulterated ... http://photos.prnewswire.com/prnh/20100430/DC95601LOGO ) The Society for ...
(Date:1/14/2014)... 2014 Global Record Systems, LLC, ... technology solutions for patients, physicians, the biopharmaceutical industry, ... today the signing of a three-year Research Collaboration ... Administration (FDA). This initiative is designed to ...
(Date:1/14/2014)... Altadena, CA (PRWEB) January 14, 2014 ... Angeles County), California, and Montreal, Canada, has big ideas ... and non-fiction. The press's goals are to produce high-quality, ... e-books to support local businesses. , The first ...
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
... announced today it has been chosen again ... of Wisconsin-Madisons Camp Randall Stadium and Kohl Center arena. ... the South Dakota-based company in the early 1990s. The ... scheduled to be complete before the start of the ...
... - Inacom Education , announced today that it is ... Microsoft Technology Trainers United Training. United Training ... training centers from around the country who have met an ... , , In order to qualify for membership, ...
... with attachments containing sensitive corporate information not intended for ... on a stolen notebook computer or sent by a ... Serious legal ramifications and breaches of national security may ... the recent DEMO 2004 conference, Adobe Systems recently introduced ...
Cached Biology Technology:Daktronics to provide Camp Randall and Kohl Center with scoreboards, display systems 2New solution protects corporate information 2
... High pH, Concentrated x 10 This ... target retrievel prior to immunohistochemical staining procedures. ... tissue sections mounted on glass slides. For ... 9.9, is especially effective. It should be ...
... off-white solid. Increases the expression of glutathione peroxidase. ... H 2 O. Unstable in aqueous solutions; ... CAS 3211-76-5, M.W. 196.1. References: Merck ... Junod, A.F. 1995. Biochem. J. ...
... UN-SCAN-IT gel Software converts any scanner into ... numerous options and features, the basic operation ... JPEG, PCX, BMP, etc.) into pixel density ... steps. Turn your scanner ...
The BioLogic Maximizer mixer is for use with the Maximizer valve system. The mixer improves gradient quality by mixing the output of the BioLogic DuoFlow workstation pumps....
Biology Products: