Navigation Links
New study shows fish respond quickly to changes in mercury deposition
Date:9/19/2007

Reducing atmospheric mercury emissions should quickly reduce mercury levels in lake fish, according to a three-year study published this week in the Proceedings of the National Academy of Science. The study showed that an increase in mercury loading at rates relevant to atmospheric deposition resulted in a significant increase in methylmercury production and accumulation in fish in only three years.

This is good news. It means that a reduction in new mercury loads to many lakes should result in lower mercury in fish within a few years, said Cynthia Gilmour, scientist at the Smithsonian Environmental Research Center and a co-investigator in the study.

While recent federal and state regulations aimed at reducing mercury levels in fish require reductions in mercury emissions, the potential effectiveness of these controls and the time frame of the response were previously unknown.

Some have speculated that it could take decades to see the impact of emissions reductions on mercury levels in fish. Centuries of human-derived mercury releases to the atmosphere have resulted in elevated amounts of mercury in sediments and soils across most of the globe. If this historical mercury contamination contributes substantially to mercury in fish, reductions in current emissions may have little impact in the foreseeable future.

The study, Mercury Experiment to Assess Atmospheric Loading in Canada and the United States, found that methylmercury (the type that accumulates in fish) was more readily produced from newly deposited mercury than from historical mercury contamination already buried in lake sediments. This means that methylmercury in lakes should decline quickly if mercury deposition is reduced.

Additionally, the study team found that mercury added directly to the lake surface was rapidly accumulated into fish, while essentially none of the mercury deposited to the lakes watershed was found in fish after three years. This
'/>"/>

Contact: Kimbra Cutlip
cutlipk@si.edu
443-482-2325
Smithsonian
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Bioartificial kidney under study at MCG
2. Novel Asthma Study Shows Multiple Genetic Input Required; Single-gene Solution Shot Down
3. W.M. Keck Foundation funds study of friendly microbes
4. Yellowstone microbes fueled by hydrogen, according to U. of Colorado study
5. Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs
6. UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims
7. Study Demonstrates Gene Expression Microarrays are Comparable and Reproducible
8. Study Links Ebola Outbreaks To Animal Carcasses
9. Genome-wide mouse study yields link to human leukemia
10. Breakthrough Microarray-based Technology for the Study of Cancer
11. NYU Study Reveals How Brains Immune System Fights Viral Encephalitis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/29/2014)... German . ... nitrogen cycle on Earth and in biological wastewater treatment ... depend on nitrite as their source of energy. An ... microbiologist at the University of Vienna, has now shown ... source of energy. The oxidation of hydrogen with oxygen ...
(Date:8/29/2014)... nucleus, chromosomal DNA is tightly bound to structural ... chromatin. Until about two decades ago, histones were ... material around which the glamorous DNA strands were ... appreciation for how DNA/histone interactions govern gene expression. ... studying the sequence of the genome from cancer ...
(Date:8/28/2014)... called TX Invasives is now available from the Lady ... at Austin for identifying harmful non-native plant, insect and ... the United States cause about $137 billion in economic ... clog waterways, kill native plants and more. , "By ... reporting where invasive species occur, we,re more likely to ...
Breaking Biology News(10 mins):Hydrogen powers important nitrogen-transforming bacteria 2Hydrogen powers important nitrogen-transforming bacteria 3'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 2'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 3Mobile app makes ID of harmful plants, insects in Texas a snap 2
... Chimpanzees, orangutans, gorillas and bonobos make more sophisticated decisions ... success, based on what they know and the likelihood to ... Daniel Haun, published on December 21 in the online journal ... human decision-making as well. The authors of the ...
... elderly people with higher levels of several vitamins and omega ... mental acuity tests and less of the brain shrinkage typical ... the opposite result. The study was among the first ... blood nutrient levels instead of basing findings on less precise ...
... Dec. 22, 2011 The American Society for Biochemistry ... internal medicine and cell biology at the Yale University ... Alice and C.C. Wang award. Ullu received ... parasitology, for her laboratory,s work with the protozoan parasite ...
Cached Biology News:Diet, nutrient levels linked to cognitive ability, brain shrinkage 2Yale scientist wins inaugural ASBMB award for her work on regulation of gene expression 2
(Date:9/2/2014)... Australia (PRWEB) September 02, 2014 The ... a cure for chronic tinnitus are seeking support for ... on the Indiegogo platform ( http://igg.me/at/tinaway ), was launched ... be a therapeutic ‘mHealth’ app and is based on ... of a team of biomedical and software engineers, Dr. ...
(Date:8/31/2014)... September 01, 2014 Available spectra ... needs for research and cultivation of a wide ... Valoya’s proprietary LEDs with proven patented and pending ... uncompromised light uniformity in critical applications in contrast ... LEDs. , “Our customers have a large variety ...
(Date:8/29/2014)... Electronic circuits are based on electrons, but one of ... photonic circuits, i.e. circuits based on light (photons) instead ... to create a stream of single photons and control ... sorts of attempts to achieve this control, but now ... creating a steady stream of photons emitted one at ...
(Date:8/29/2014)... Local veterinarian, Dr. Keith Clement, and his ... to participate in an investigational study of donor stem ... of this study is to determine if a single ... arthritically affected joints can help reduce pain and inflammation ... current investigational study must be older than nine months, ...
Breaking Biology Technology:tinAway Pty. Ltd. launch a crowdfunding campaign to fund a clinical trial of tinAway, a new potential cure for chronic tinnitus 2tinAway Pty. Ltd. launch a crowdfunding campaign to fund a clinical trial of tinAway, a new potential cure for chronic tinnitus 3tinAway Pty. Ltd. launch a crowdfunding campaign to fund a clinical trial of tinAway, a new potential cure for chronic tinnitus 4tinAway Pty. Ltd. launch a crowdfunding campaign to fund a clinical trial of tinAway, a new potential cure for chronic tinnitus 5Breakthrough in light sources for new quantum technology 2Burnt Hills Veterinary Hospital Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2
... Carbon nanotubes are promising materials for many high-technology ... optical and electrical properties. , Now researchers at ... thin films that are semitransparent, highly conductive, flexible ... an appearance similar to stained glass. These results, ...
... Is the United States making,it too difficult ... post-9/11 America? What,are the implications of a ... research and industrial activities?, Michael Koeris, ... biomedical,engineering at Boston University, tackles these issues ...
... GmbH, the leading,provider of products and services enabling ... appointment of Annette Kassen, Ph.D., to,the newly created ... Kassen has spent the last 14 years of ... field of oncology. At Indivumed she will be,responsible ...
Cached Biology Technology:Carbon nanotubes made into conductive, flexible 'stained glass' 2Indivumed Appoints Annette Kassen as Vice President Clinical Research 2
Hygromycin resistance gene (hph), provided in a pORF plasmid. pORF is an expression plasmid selectable with Ampicillin....
These are replacement caps for No. CLS6980 5mm PYREX NMR tubes. Proper method to remove caps is to slice them from the tube. Caps come in eight assorted/mixed colors. Packed in bags of 100....
Standard Fluka For microscopy (Hist.) redox indicator...
... VSN-5 Nutating Mixer is a combination of ... a three dimensional action while providing gentle, ... quality unit can be used for a ... of specimens, tissue culture, immunoblots, staining/destaining, chromatography, ...
Biology Products: