Navigation Links
Fish extinctions alter critical nutrients in water, study shows

Ecosystems are such intricate webs of connections that few studies have been able to explore exactly what happens when a species dies out.

Now, a Cornell study using computer simulations has teased out how the disappearance of a freshwater fish can affect the availability of certain nutrients that other species rely on.

Algae, at the base of the food chain, for example, rely on fish to cycle back into the water such nutrients as nitrogen and phosphorus, which are otherwise locked up in animal or plant cells. Fish excrete dissolved nutrients back into the water, making them available to algae, which need them to grow.

The study, published in the Feb. 27 issue of the Proceedings of the National Academy of Sciences, finds that overfishing could threaten the overall health of an ecosystem because it targets important fish species that play major roles in recycling nutrients. In fact, 20 percent of fish species accounted for more than half of all the recycled nutrients in the ecosystems studied, the computer simulations found.

"The loss of the most heavily fished species led to the fastest declines in nutrient recycling," said lead author Peter McIntyre, a postdoctoral researcher at Wright State University who was a graduate student in Cornell's Department of Ecology and Evolutionary Biology when he conducted the study. "Fishermen are targeting relatively large and abundant species that happen to play a major role in nutrient recycling."

The simulations, which relied on data from Rio Las Marias, a Venezeulan river, and Lake Tanganyika, a massive lake bordering Tanzania, Zaire, Zambia and Burundi, also shed light on the roles that surviving species might play in replacing the lost nutrients. In both ecosystems studied, when surviving species successfully picked up the slack in nutrient recycling left by an extinct species, nitrogen and phosphorus were maintained at 80 percent of their starting values until over half the total num
'"/>

Source:Cornell University News Service


Page: 1 2

Related biology news :

1. Super predators and mass extinctions
2. New study pinpoints epicenters of Earths imminent extinctions
3. Climate change drives widespread amphibian extinctions
4. Man may have caused pre-historic extinctions
5. Birth rate, competition are major players in hominid extinctions
6. Improved predictions of warming-induced extinctions sought
7. Products containing specific probes for detecting alternative splice forms protected
8. Compounds in plastic packaging act as environmental estrogens altering breast genes
9. Plant pathologists evaluate eco-friendly alternatives to methyl bromide
10. New technique could alter field of mouse genetics
11. Genetic variation alters response to common anti-clotting drug
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Fish extinctions alter critical nutrients water study shows

(Date:8/21/2014)... SHELTON, Conn. , Aug. 21, 2014 ... on the growing mobile commerce market, announced today that ... purchase common stock to be issued in its proposed ... been approved for listing on The Nasdaq Capital Market, ... of the common stock and warrants, and will trade ...
(Date:8/21/2014)... A landmark study aimed at improving the food intake, ... long-term care homes is among three projects at the ... grants from the Canadian Institutes of Health Research (CIHR). ... Applied Health Sciences at Waterloo, and a Schlegel research ... two years to investigate why many Canadians living in ...
(Date:8/21/2014)... Saturday to Wednesday, Oct. 18-22, 2014 , ... Harbor Drive, San Diego, CA 92101 , ... other presentations of the latest research in human ... session featuring high-scoring abstracts on rare genetic variants ... cancers, and treatment for sun sensitivity (Saturday, Oct. ...
Breaking Biology News(10 mins):Nxt-ID Approved for NASDAQ Capital Market Listing 2Nxt-ID Approved for NASDAQ Capital Market Listing 3Grants will fund landmark aging research at Waterloo 2American Society of Human Genetics 2014 Annual Meeting 2
... that resists infection, yet 10% of the world's agricultural ... fungi, and viruses. Understanding how disease resistance works may ... study published online this week in the open-access journal ... how one aspect of the plant immune system is ...
... and separate a wide class of swimming bacteria ... at Argonne National Laboratory, Illinois Institute of technology, ... UK. This device could have enormous applications in ... medical diagnostic kits and bioanalysis. , The technique ...
... person, it triggers a series of biochemical reactions in immune-system ... , Usually, the result is an effective immune response, leading ... recovery. But in the case of some of the world’s ... as well as the influenza virus strain responsible for the ...
Cached Biology News:Researchers develop technique for bacteria crowd control 2New study may show how to forestall a fatal, virus-caused immune-system meltdown 2New study may show how to forestall a fatal, virus-caused immune-system meltdown 3
(Date:8/21/2014)... Aug. 21, 2014  Four-dimensional (4-D) printing develops ... on external stimuli such as changes in temperature. ... disruptive effect in multiple industries.  In the near ... by printing objects ranging from human organs to ... Logo - http://photos.prnewswire.com/prnh/20140820/138289 ...
(Date:8/21/2014)... Wednesday of last week RENU 28, the world's first and ... for purchase in Australia and New Zealand, and the response ... is, if you think about the definition of aging, it's ... within your body. If you think about the definition of ... What RENU 28 does is it works with these tiny ...
(Date:8/20/2014)... , Aug. 20, 2014 Neurotrope, ... host a conference call to provide an update ... p.m. Eastern daylight timeDial-in numbers:(888) 505-4369 (U.S. and ... Live web cast: www.neurotropebioscience.com , under "Investor Relations"The ... after completion through September 2, 2014 at (888) ...
(Date:8/20/2014)... Toronto, Canada (PRWEB) August 20, 2014 ... wisdom that E&L studies should be performed late in ... system is known. But current regulatory trends suggest that, ... are on the rise. In recent years, multiple drug ... E&L packages or address specific questions during phase I/II. ...
Breaking Biology Technology:Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 2Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 3Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 4RENU 28 Skin Care Now Available in Australia and New Zealand 2Neurotrope To Host Conference Call 2Are Extractable and Leachables going Phase-Appropriate? New Webinar Hosted by Xtalks 2
... LSU associate professor of chemistry in the College of ... honor for scientists and engineers in the early stages ... Award for Scientists and Engineers, or PECASE. "I ... award. LSU is a rich environment for accomplishing nanoscience ...
... ... ... ... by longUrl, so we need to grab the first one. for (var r in data.results) { first_result = data.results[r]; ...
... ... ... var shortURL = ... need to grab the first one. for (var r in data.results) { first_result = data.results[r]; break; } for (var ...
Cached Biology Technology:LSU’s Jayne Garno receives early career award from President 2Atrium Innovations Announces Third Quarter Financial Results of 2010 2Atrium Innovations Announces Third Quarter Financial Results of 2010 3Atrium Innovations Announces Third Quarter Financial Results of 2010 4Atrium Innovations Announces Third Quarter Financial Results of 2010 5Atrium Innovations Announces Third Quarter Financial Results of 2010 6Atrium Innovations Announces Third Quarter Financial Results of 2010 7Atrium Innovations Announces Third Quarter Financial Results of 2010 8Atrium Innovations Announces Third Quarter Financial Results of 2010 9Atrium Innovations Announces Third Quarter Financial Results of 2010 10Atrium Innovations Announces Third Quarter Financial Results of 2010 11Atrium Innovations Announces Third Quarter Financial Results of 2010 12Atrium Innovations Announces Third Quarter Financial Results of 2010 13Neuro-Biotech Corp. Neuroceuticals® : A solution to feed the brain 2Neuro-Biotech Corp. Neuroceuticals® : A solution to feed the brain 3Neuro-Biotech Corp. Neuroceuticals® : A solution to feed the brain 4Neuro-Biotech Corp. Neuroceuticals® : A solution to feed the brain 5Neuro-Biotech Corp. Neuroceuticals® : A solution to feed the brain 6Neuro-Biotech Corp. Neuroceuticals® : A solution to feed the brain 7Neuro-Biotech Corp. Neuroceuticals® : A solution to feed the brain 8
Screening test for the detection of Salmonella sp. by means of DNA amplification, subsequent molecular hybridization and detection on a microtitre plate....
... 10X PCR Enhancer (with betaine) substantially ... sensitivity and specificity for amplification of ... Enhancer in PCR eliminates the base-pair ... enzyme?s thermal stability, suppresses pauses of ...
... be used with all 96-well ... stacking of covered plates ... with automated systems ... are available for use with ...
Designed for use with all 96-well SPRI reagent kits. Used with round bottom 96-well microplates, and 96-well thermal cycling plates....
Biology Products: