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:12/5/2014)... Utah , Dec. 4, 2014  Tute Genomics, ... raised $2.3 million in Series A1 funding led by ... investors also participated in the investment round. ... the healthcare community adopts next-generation sequencing and seeks new ... said Reid Robison , MD MBA, and CEO ...
(Date:11/21/2014)... NEW YORK , Nov. 19, 2014  Earlier ... Board at New York College, and one of the ... for biosensor signals that are transmitted from Smartphones to ... there were Smartphones and has one of the earliest ... are discussing its usage in the military, child care, ...
(Date:11/18/2014)... 2014   News Highlights: ... develop The Partners Data Lake, an agile data ... Lake will allow researcher and clinicians to explore ... the lives of patients , The Partners ... across the Partners system, breaking down physical barriers ...
Breaking Biology News(10 mins):Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 3Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 5
... cute exteriors, according to University of British Columbia-led study that ... pick on individuals who are different from them. ... kind actors, the new study published by the Association ... infants condone antisocial behavior when it is directed at individuals ...
... whether to approve hydraulic fracturing for natural gas in the ... been proposed. But a new study finds that it ... energy infrastructure to one powered by wind, water and sunlight ... Energy Policy , shows the way to a sustainable, inexpensive ...
... reefs not only provide the world with rich, productive ... economic boost valued at hundreds of billions of dollars. ... variety of threatsfrom pollution to climate warminghas lent urgency ... health. A new study by Scripps Institution of ...
Cached Biology News:Friend or foe: Babies choose sides early 2Stanford researchers map out an alternative energy future for New York 2Stanford researchers map out an alternative energy future for New York 3Fluorescent light revealed as gauge of coral health 2
(Date:12/19/2014)... December 18, 2014 Ed Bilsky, Ph.D., ... the Center for Excellence in the Neurosciences (CEN), and ... has been selected as a member of the prestigious ... first neuroscientist from Maine to receive this honor. , ... supported entirely by the Dana Foundation. Its mission ...
(Date:12/19/2014)... (PRWEB) December 19, 2014 The ... to the rising ageing population and technological innovations ... and nutraceutical industries are catalysing the growth of ... @ http://www.marketsandmarkets.com/Market-Reports/empty-capsules-market-218018190.html , Scope of Report ... as well as new entrants/smaller firms to gauge ...
(Date:12/19/2014)... , Dec. 18, 2014   ISN ... & Safety Performance Indicators publication series. With ... of activity reported in 2013 within its online contractor ... and safety key performance indicator (KPI) statistics. ... Clients, U.S. publication is available in two ...
(Date:12/17/2014)... 16, 2014 “Never say, ‘I ... Universität Marburg’s Department of Physics, advises young women ... newly released SPIE Women in Optics 18-month ... shy to ask questions.” , In the annual ... mathematics) occupations ranging from university professor and laboratory ...
Breaking Biology Technology:UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 3Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 2Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 3Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 4ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 2ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 3Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3
... that a new stem cell gene and enzyme replacement treatment ... Tay-Sachs disease on November 2, 2010. Tay-Sachs is a devastating ... and in very rare cases families of Eastern European background ... normal at birth but about six months of age they ...
... Regenicin, Inc . (OTC Bulletin Board: WDST), a biotechnology ... restore the health of damaged tissues and organs, today announced ... Board from "WDST" to "RGIN.OB" effective at the opening of ... CEO, Randall McCoy said the change in ticker symbol was ...
... Nov. 10, 2010 Marshall Edwards, Inc.(Nasdaq: MSHL ... novel anti-cancer therapeutics, announced today that Daniel P. Gold, Ph.D., ... Marshall Edwards and its lead oncology programs at the Lazard ... 3:15 p.m. EST from the St. Regis New York. A ...
Cached Biology Technology:Tay-Sachs Disease Stem Cell Gene Enzyme Treatment 2