Navigation Links
New study shows fish respond quickly to changes in mercury deposition
Date:9/22/2007

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:7/9/2014)... Emerging fungal pathogens pose a greater threat to ... declines of amphibians, bats, corals, bees and snakes. ... published in the prestigious journal Nature ... resistance to a deadly chytrid fungus implicated in ... is important because it is the basis of ...
(Date:7/9/2014)... Rochelle, NY, July 9, 2014Biofuels derived from the oils ... to fossil fuels. To achieve this goal, optimization of ... in open pond systems, is needed. Sapphire Energy has ... of open pond algae cultivation systems, described in ... Liebert, Inc., publishers. The article is available on the ...
(Date:7/9/2014)... The Cancer Genome Atlas (TCGA) Research Network have ... in lung adenocarcinoma, the most common subtype of ... expand the number of possible therapeutic targets for ... of patients with treatable mutations because many potent ... , TCGA is jointly funded and managed by ...
Breaking Biology News(10 mins):USF study: Amphibians can acquire resistance to deadly fungus 2Controlling contamination in open algae ponds for biofuels 2Study identifies novel genomic changes in the most common type of lung cancer 2Study identifies novel genomic changes in the most common type of lung cancer 3
... potentially life-threatening challenge characterized by pauses in breathing that ... prematurity (AOP) affects more than 50 percent of premature ... preemies. Caused in part by an underdeveloped central nervous ... womb, especially during sleep, AOP is not yet fully ...
... or the American Chemical Society as publisher of this report. ... time in the United States, researchers are reporting in a ... fresh and canned food as well as food wrapped in ... almost 1,000 times lower than the "tolerable daily intake" levels ...
... study by the team headed by Llus Ribas de Pouplana, ... Barcelona), has been chosen as "Paper of the week" in ... , which is already available online. The article describes the ... melanogaster (fruit fly) that is crucial for mitochondria. The ...
Cached Biology News:UMass Medical School study points to genetic link in apnea of prematurity 2Scientists at IRB Barcelona discover a new protein critical for mitochondria 2
(Date:1/15/2014)... 15, 2014   Niagara Thermal Products is proud ... BioBlower Technologies LLC ("B3") as the critical thermal component ... from the Army Corps of Engineers.  B3 has developed ... biological contaminants and destroys VOCs and other chemical pollutants, ...
(Date:1/15/2014)... Toronto, Canada (PRWEB) January 15, 2014 ... perspectives on nonclinical and clinical safety assessment in biosimilars. ... a path for biosimilar drug development, however the complex ... regards to quality, safety and efficacy extremely challenging. Based ...
(Date:1/15/2014)... 15, 2014 DTS Language Services, Inc ... Web Portal for Life Science organizations who need document translations. ... subject matter of their documents in advance with a selection ... time-to-delivery of translations, often a critical factor in clinical and ...
(Date:1/14/2014)... Date: Friday, April 11, 2014 , Time: 6 p.m. – ... Warrington, Pa. , Details: The Hepatitis B Foundation, ... cure for hepatitis B and improving the quality of life ... on Friday, April 11 at Warrington Country Club in Warrington, ...
Breaking Biology Technology:Niagara Thermal Products LLC Selected as Critical Supplier for Buffalo BioBlower Air Purification Systems 2Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2DTS Improves Efficiency for Life Science Document Translations 2Hepatitis B Foundation to Host Annual Crystal Ball Gala 2
... to Exceed $8 Billion Globally by 2012VENTURA, Calif., ... a continuous, integrated and wearable remote patient monitoring ... executive officer Howard Baker will present at the ... the Marines Memorial Club and Hotel in San ...
... 7 Nuvelo, Inc.,(Nasdaq: NUVO ) ... approved,the issuance of Nuvelo Common Stock pursuant to ... between Nuvelo, ARCA biopharma and a Nuvelo,subsidiary. Nuvelo,s ... until January 23, 2009, to solicit additional proxies ...
... settled in for the,winter months and since the common ... days of school and work, now is the time ... Immunity Enhanced Beverage is designed,to do just that. , ... Products, Immunity Enhanced,Beverage is a ready-to-drink liquid supplement intended ...
Cached Biology Technology:VivoMetrics to Present at the 2009 Biotech Showcase 2VivoMetrics to Present at the 2009 Biotech Showcase 3Nuvelo Shareholders Approve Issuance of Common Stock Pursuant to Merger Agreement With ARCA biopharma 2Nuvelo Shareholders Approve Issuance of Common Stock Pursuant to Merger Agreement With ARCA biopharma 3Nuvelo Shareholders Approve Issuance of Common Stock Pursuant to Merger Agreement With ARCA biopharma 4Nuvelo Shareholders Approve Issuance of Common Stock Pursuant to Merger Agreement With ARCA biopharma 5Innovative Beverage Products Launches New Product Designed to Enhance the Body's Immune Defense 2
DAPI: 4', 6-Diamino-2-phenylindole dihydrochloride. Antifade Solution: p-Phenylenediamine and glycerol in PBS solution. 0.4g/mL DAPI suspended in Antifade....
... 13(S)-HODE-d4 contains 4 deuterium atoms at the ... intended for use as an internal standard for ... spectrometry. 13(S)-HODE is produced by incubation of linoleic ... been shown to inhibit the adhesion of tumor ...
...
...
Biology Products: