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

suggests that lakes should exhibit a two-phase response to load reductions. Initially, mercury in fish should decline rapidly (within years) as deposition to the lake itself is reduced. A slower, more prolonged decline (perhaps decades long) should follow in response to decreases in mercury deposition in the watershed.

The study was accomplished through an experimental addition of mercury to a small lake and its watershed at the Experimental Lakes Area, a Canadian federal research reserve. ELA is a remote, protected area set aside for the long-term study of lakes and watersheds, where deposition of mercury is low compared with sites in Europe and the United States. For three years, the mercury load to the lake ecosystem was increased by roughly three timesbringing the total annual mercury load up to a level comparable to that on the east coast of the United States. This large-scale, whole ecosystem approach was important because the complex behavior of ecosystems can be difficult to predict from smaller-scale experiments.

To distinguish the mercury they added to the lake from the existing mercury in the study ecosystem, the researchers used a sophisticated analytical method that had never been used in this way at such a large scale. Mercury in the natural environment is made up of seven stable isotopes that do not vary much in proportion to one another. To dose the lake, the scientists used mercury that is heavily enriched in one of those isotopes, enabling them to trace the mercury they added through the complex environmental mercury cycle.

Gilmour and her colleagues Andrew Heyes (University of Maryland) and Robert Mason (University of Connecticut) focused on one of the key processes in that cycle, the microbial production of methylmercury, which is produced by natural bacteria in sediments and soils and accumulates in food webs.

It will be important to monitor mercury during the next 20 years to make sure that emissions regul
'/>"/>

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:4/22/2014)... not only on weight loss but also on diabetes ... University of Cincinnati have shown that the health benefits ... size but by increased levels of bile acids in ... indicate that bile acids could be a new target ... the Sahlgrenska Academy has demonstrated that obesity surgery is ...
(Date:4/21/2014)... 2014 Performing brain research that can one day ... Houston (UH) junior Khanh (Kate) Nguyen has been recognized ... double major in mathematics and physics, Nguyen is among ... , One of the most prestigious awards available ... sophomore and junior students majoring in mathematics, the natural ...
(Date:4/21/2014)... predict which drug candidates offer the greatest potential has ... drug-like molecules and the amino acids of proteins vary ... cunningly managed to develop a method that has proven ... class of human target proteins for drugs are the ... per cent of all drugs on the market. These ...
Breaking Biology News(10 mins):Researchers identify a mechanism linking bariatric surgery to health benefits 2UH student named Goldwater Scholar, 2 more receive honorable mention 2UH student named Goldwater Scholar, 2 more receive honorable mention 3UH student named Goldwater Scholar, 2 more receive honorable mention 4Simulating in tiny steps gave birth to long-sought-after method 2
... Gent - VIB/UGent researchers have unveiled a mechanism that can ... For years, improving drought tolerance has been a major aim ... extreme drought stress. However, translating this research to the field ... in Nature Biotechnology and the Plant Cell ...
... the brain that uses hearing to determine sound location is ... a new study by a team of researchers from Virginia ... These findings propose a new theory for cross-modal plasticity: ... maintaining the original function of the brain region. ...
... Richmond, Va. (May 10, 2011) Cancer researchers ... for advanced prostate cancer after effectively combining an ... vivo using novel ultrasound-targeted microbubble-destruction (UTMD) technology. The ... University Massey Cancer Center, VCU Institute of Molecular ...
Cached Biology News:Drought tolerance in crops: Shutting down the plant's growth inhibition under mild stress 2For hearing parts of brain, deafness reorganizes sensory inputs, not behavioral function 2Microbubble-delivered combination therapy eradicates prostate cancer in vivo 2
(Date:1/15/2014)... 2014 A study has been launched to ... 1 track could help to tackle the problem of obesity. ... (a GP surgery based in Stowmarket) and academics at University ... Telemetry technology, which is inspired by equipment used to ...
(Date:1/15/2014)... January 15, 2014 2013 was a ... Brain State Technologies®. They saw continued independent research led ... who were awarded a $1 million grant from the ... “Brain and Behavior” a peer reviewed journal, Amy Grant ...
(Date:1/14/2014)... Carahsoft and CDS Federal Services have scheduled a ... EST (11am PST), “Natural Language Processing: Converting Raw Data ... can turn raw, heterogeneous data into actionable knowledge to ... webinar will last approximately one hour. , Synopsis: Big ...
(Date:1/14/2014)... Jan. 14, 2014 The largest international professional ... plants and therapeutic derivatives thereof has endorsed an ... researchers about the challenges of adulterated herb and ... The Society for Medicinal Plant ...
Breaking Biology Technology:Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3Webcast - 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 8
... June 13, 2011 K-V Pharmaceutical Company (the "Company") (NYSE: ... for the fiscal year ended March 31, 2011 with the ... be holding an investor conference call today at 4:30 p.m. ... a general update on other company matters. Participants can listen ...
... 2011 Cell Therapeutics, Inc. ("CTI") (NASDAQ: CTICD and MTA: ... list of preliminary additions to the Russell 3000® Index and ... 2011 at www.russell.com .  Russell Investments will finalize the ... on June 24, 2011. "We are very ...
... 10, 2011 /PRNewswire-Asia-FirstCall/ -- China Cord Blood Corporation (NYSE: ... of cord blood collection, laboratory testing, hematopoietic stem cell processing, ... results for the fourth quarter and fiscal year of 2011, ... Quarter of Fiscal 2011 Highlights Revenue in ...
Cached Biology Technology:K-V Pharmaceutical Company Announces Filing of Fiscal 2011 Form 10-K and Schedules Investor Conference Call 2K-V Pharmaceutical Company Announces Filing of Fiscal 2011 Form 10-K and Schedules Investor Conference Call 3K-V Pharmaceutical Company Announces Filing of Fiscal 2011 Form 10-K and Schedules Investor Conference Call 4K-V Pharmaceutical Company Announces Filing of Fiscal 2011 Form 10-K and Schedules Investor Conference Call 5K-V Pharmaceutical Company Announces Filing of Fiscal 2011 Form 10-K and Schedules Investor Conference Call 6K-V Pharmaceutical Company Announces Filing of Fiscal 2011 Form 10-K and Schedules Investor Conference Call 7Cell Therapeutics on Preliminary List of Additions to Russell 3000® Index and Russell Global Index 2Cell Therapeutics on Preliminary List of Additions to Russell 3000® Index and Russell Global Index 3China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 2China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 3China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 4China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 5China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 6China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 7China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 8China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 9China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011 10
... between the various commercial and lab-prepared glass ... the length and GC content of the ... protocol employed all influence the optimal hybridization ... all the different variables to consider, it ...
... Gel Stain combo offers these benefits: ... separately Offers a safer ... Eliminates risks to yourself, the environment and ... 100 bp to >30 kb. UltraPure Agarose is a ...
This is a PYREX replacement Allihn condenser with a 34/45 inner joint on the bottom for the No. CLS3840-S 125mL extractor system. The tubulation O.D. on the condenser is 10mm....
... 400 unique human proteins on a ... proteins, all extracellular proteins (EP) according ... in quadruplicate for high-quality results. Additional ... layout guarantee high validity and reproducibility., ...
Biology Products: