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:7/31/2014)... State University researchers have completed a 20-year study ... Hills prairie at different times of the year. ... late spring time frame has no measurable negative ... have multiple benefits. , The study was conducted ... Prairie Biological Station fire chief, and Joseph Craine, ...
(Date:7/31/2014)... July 31, 2014 -- Do people make a rational ... raise them that way? Is it a matter of ... and a colleague from Rice University say that neither ... people lean left while others lean right. , A ... deep-seated psychology are at the core of political differences, ...
(Date:7/31/2014)... the U.S. surgeon general issued a 101-page report about ... University published a paper breaking new ground on how ... responds when exposed to ultraviolet (UV) light. , The ... UV rays found in sunlight. This damage can lead ... , "Our paper advances foundational knowledge about how ...
Breaking Biology News(10 mins):Study finds benefits to burning Flint Hills prairie in fall and winter 2Study finds benefits to burning Flint Hills prairie in fall and winter 3Scientists find growing consensus: Political attitudes derive from body and mind 2New paper describes how DNA avoids damage from UV light 2New paper describes how DNA avoids damage from UV light 3
... RIVERSIDE, Calif. Huanglongbing (HLB) or citrus ... Asian citrus psyllid , and poses a serious threat ... bacteria kill citrus by disrupting the trees, food transportation ... need sophisticated tools that rapidly characterize citrus varieties and ...
... JOLLA, Calif. , Nov. 20, 2013  Wellspring Biosciences, a ... novel drugs for the treatment of cancer, announced today a ... founders and chairman of its scientific advisory board, in the ... molecules that bind irreversibly to a common oncogenic mutant, K-Ras ...
... be a significant source of arsenic exposure regardless of arsenic ... finds. The study also confirms that toenail clippings are ... alcohol, Brussels sprouts and dark meat fish. Exposure to arsenic ... cancer, vascular diseases and low birth weight. The findings ...
Cached Biology News:Geneticists receive funding to improve citrus production and health 2Geneticists receive funding to improve citrus production and health 3Wellspring Biosciences Founder Publishes In Nature On Discovery of Small Molecule Inhibitors of K-Ras 2Dartmouth-led study shows diet alone can be significant source of arsenic 2
(Date:7/31/2014)... 2014 The SNIS Foundation recognized its ... fund a translational research project.  The first award ... was presented at the Society of NeuroInterventional Surgery ... Colorado Springs, CO. ... neurovascular conditions, SNIS formed the SNIS Foundation, in ...
(Date:7/31/2014)... North Shore Towers, a luxury co-op community ... Energy, one of the nation’s leading combined heating and power ... its 43-year-old CHP system. The original CHP system had been ... extend the life of the plant, GI Energy was contracted ... heat recovery equipment, while maintaining continuous operation of the entire ...
(Date:7/31/2014)... SAN DIEGO, July 31, 2014 ... a leading company using proprietary taste science technologies ... for the food, beverage, and ingredient supply industries, ... 2014.  The Company ended the second quarter with ... "During the past quarter Senomyx ...
(Date:7/31/2014)... San Diego, CA (PRWEB) July 31, 2014 ... company announced today the integration of Omicsoft’s Array Suite ... to both platforms will be able to send data ... The integration works with all versions of tranSMART including ... of the art statistics, visualization and storage for the ...
Breaking Biology Technology:SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 2SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 3North Shore Towers Partners with GI Energy to Install Turnkey Natural Gas-Fired Combined Heat and Power Plant 2SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 2SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 3SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 4SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 5SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 6SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 7SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 8SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 9SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 10SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 11SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 12SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 13SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 14SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 15SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 16Rancho BioSciences, in Partnership with Omicsoft, have Integrated Array Suite with tranSMART 2Rancho BioSciences, in Partnership with Omicsoft, have Integrated Array Suite with tranSMART 3
... , ... combination of Edman sequence analysis and electrospray tandem mass spectrometry provides accurate and ... Purpose , ... disulfide bridged peptides is greatly facilitated using a combination of the Procise cLC ...
... , , ... pesticide residues in food and environmental samples requires the use ... technologies. In this , application note the benefits ... is described. In particular the role of the collision cell in the MS/MS , ...
... housands of engineers and ... applications: test and measurement, process control and automation, ... choice due to its unparalleled connectivity to instruments, powerful ... interface, scalability, and overall function completeness. One need ...
Cached Biology Technology:Efficient Primary Structure Elucidation of Disulfide-bridged Peptides 2Efficient Primary Structure Elucidation of Disulfide-bridged Peptides 3Efficient Primary Structure Elucidation of Disulfide-bridged Peptides 4Efficient Primary Structure Elucidation of Disulfide-bridged Peptides 5Fast Multi-Residue Pesticide Analysis in Soil and Vegetable Samples 2Fast Multi-Residue Pesticide Analysis in Soil and Vegetable Samples 3Fast Multi-Residue Pesticide Analysis in Soil and Vegetable Samples 4LabVIEW for Measurement and Data Analysis 2LabVIEW for Measurement and Data Analysis 3LabVIEW for Measurement and Data Analysis 4LabVIEW for Measurement and Data Analysis 5LabVIEW for Measurement and Data Analysis 6LabVIEW for Measurement and Data Analysis 7LabVIEW for Measurement and Data Analysis 8LabVIEW for Measurement and Data Analysis 9LabVIEW for Measurement and Data Analysis 10LabVIEW for Measurement and Data Analysis 11LabVIEW for Measurement and Data Analysis 12LabVIEW for Measurement and Data Analysis 13LabVIEW for Measurement and Data Analysis 14LabVIEW for Measurement and Data Analysis 15