Navigation Links
A tale of 2 lakes: One gives early warning signal for ecosystem collapse
Date:4/28/2011

cosystems are often transformed by overfishing, insect pests, chemical changes in the environment, overgrazing and shifting climate.

For humans, ecosystem change can impact economies and livelihoods such as when forests succumb to an insect pest, rangelands to overgrazing, or fisheries to overexploitation.

A vivid example of a collapsed resource is the Atlantic cod fishery.

Once the most abundant and sought-after fish in the North Atlantic, cod stocks collapsed in the 1990s due to overfishing, causing widespread economic hardship in New England and Canada. Now, the ability to detect when an ecosystem is approaching the tipping point could help prevent such calamities.

In the new study, the Wisconsin researchers, collaborating with scientists at the Cary Institute for Ecosystem Studies in Millbrook, N.Y., the University of Virginia in Charlottesville and St. Norbert College in De Pere, Wis., focused their attention on Peter and Paul Lakes, two isolated and undeveloped lakes in northern Wisconsin.

Peter is a six-acre lake whose biota were manipulated for the study and nearby Paul served as a control.

The group led by Carpenter experimentally manipulated Peter Lake over a three-year period by gradually adding predatory largemouth bass to the lake, which was previously dominated by small fish that consumed water fleas, a type of zooplankton.

The purpose, Carpenter notes, was to destabilize the lake's food web to the point where it would become an ecosystem dominated by large predators.

In the process, the researchers expected to see a relatively rapid cascading change in the lake's biological community, one that would affect all its plants and animals in significant ways.

"We start adding these big ferocious fish and almost immediately this instills fear in the other fish," Carpenter says.

"The small fish begin to sense there is trouble and they stop going into the open water and
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Sweet chemistry: Carbohydrate adhesion gives stainless steel implants beneficial new functions
2. Inventions of evolution: What gives frogs a face
3. Human networking theory gives picture of infectious disease spread
4. UF research gives clues about carbon dioxide patterns at end of Ice Age
5. Chromosomal break gives scientists a break in finding new puberty gene
6. Genome inversion gives plant a new lifestyle
7. Increase in Cambodias vultures gives hope to imperiled scavengers
8. Glorious gadolinium gives flash memory a future
9. Common orchid gives scientists hope in face of climate change
10. Greenland glacier gives birth to giant iceberg
11. Artificial bee eye gives insight into insects visual world
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/17/2014)... September 17, 2014 Researchers at UTSouthwestern Medical Center ... circulating protein apolipoprotein E, called apoE3, helps repair the ... apoE4, do not get the benefit of this repair, ... "We believe that we have identified one mechanism by ... a genetic variant, apoE4, is detrimental," said Dr. ...
(Date:9/17/2014)... University] After decades of decline, grasses have returned ... the eye, the marsh in those places seems healthy ... key service of the marsh coastal protection ... the ecosystem function hasn,t come back," said ecologist Mark ... of the study in the journal Biological Conservation ...
(Date:9/17/2014)... the United Kingdom forms a new crime unit designed ... uproar last year over horse meat being passed off ... technique for detecting meat adulteration. They describe their approach, ... ACS, Journal of Agricultural and Food Chemistry . ... is a major global economic problem. But they also ...
Breaking Biology News(10 mins):Protein variant may boost cardiovascular risk by hindering blood vessel repair 2Cape Cod saltmarsh recovery looks good, falls short 2Cape Cod saltmarsh recovery looks good, falls short 3
... issue of the Journal of General Physiology ... of British Columbia, Vancouver) and colleagues that explores pore ... in vivo nonsense suppression technology. The study will be ... to Riccardo Olcese (UCLA) in a commentary accompanying the ...
... in DNA sequencing make determining how living things ... which their genes have been rearranged on chromosomes. ... requires massive computing impossible even on the most ... $1 million project, funded by the National Science ...
... in high-throughput DNA sequencing have opened up the ... by analyzing the ways in which their genes ... evolutionary relationships from rearrangement events is computationally intensive ... today. Research recently funded by the American ...
Cached Biology News:Petascale computational tools could revolutionize understanding of genomic evolution 2Petascale computing tools could provide deeper insight into genomic evolution 2Petascale computing tools could provide deeper insight into genomic evolution 3
(Date:9/18/2014)... ST. LOUIS , Sept. 18, 2014 /PRNewswire/ ... ) announced today it has entered into a ... Michigan (U-M) Medical School,s Vector Core. Under the ... Sigma CRISPR technology, experimental design consultation, and dedicated ... poised to accelerate gene editing-based research at the ...
(Date:9/18/2014)... loss and diabetes prevention, could actually hasten the development ... it in a surprising way: by changing the composition ... population of bacteria residing in our intestines. These findings, ... published today in Nature . Among other things, ... Department, who led this research together with Prof. Eran ...
(Date:9/18/2014)... CA (PRWEB) September 18, 2014 ... which include Sartorius/Biohit, Socorex, Capp, and AccuPet brand ... volumes of 100 uL or less and are ... and forensic applications. , The micropipette promotions ... quality and economic alternative products to help customers ...
(Date:9/17/2014)... Sept. 17, 2014 The global consumption of squalene ... Squalene is a natural skin-identical chemical that finds applications in ... food supplements, pharmaceuticals, and in other applications like high grade ... has a few major players and is regionally segregated. Sophim ... Liver Oil Co. Ltd. ( Japan ), SeaDragon ...
Breaking Biology Technology:Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 2Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 3Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 4Gut bacteria, artificial sweeteners and glucose intolerance 2Gut bacteria, artificial sweeteners and glucose intolerance 3Major Pipette Distributor Pipette.com Announces Promotions on Sartorius/Biohit, Socorex, Capp, and AccuPet Micropipettes 2Major Pipette Distributor Pipette.com Announces Promotions on Sartorius/Biohit, Socorex, Capp, and AccuPet Micropipettes 3Squalene Market by Source (Animal & Vegetable) & by End-user Industry (Cosmetics, Pharmaceuticals & Food Industry) - Global Trends & Forecasts to 2019 2Squalene Market by Source (Animal & Vegetable) & by End-user Industry (Cosmetics, Pharmaceuticals & Food Industry) - Global Trends & Forecasts to 2019 3
... generation design reduces the amount of retraction needed for surgical ... ... 23 Pioneer Surgical Technology,today announces the market availability of the ... cervical fusion procedures while addressing the clinical needs of,anterior cervical discectomy ...
... Technology,Inc. (Nasdaq: EFUT ) (,eFuture,), a leading ... to China,s retail and consumer goods,industries, today announced ... its,mySHOP Retail Business Management System 3.0 (,mySHOP 3.0, ... Group,). eFuture will install,the system at Tiens Group,s ...
... company enters into a strategic supply chain agreement in preparation for ... ... July 23, 2008 -- CN Probes , an emerging nanotech ... (contract manufacturer). This agreement puts CN Probes closer to ramping up ...
Cached Biology Technology:Pioneer(R) Surgical Technology, Inc. Announces the Market Launch of the SlimFuse(TM) Anterior Cervical Plate System 2eFuture Signs Contract to Provide Tiens Group with Retail Business Management System 2eFuture Signs Contract to Provide Tiens Group with Retail Business Management System 3eFuture Signs Contract to Provide Tiens Group with Retail Business Management System 4eFuture Signs Contract to Provide Tiens Group with Retail Business Management System 5Carbon Nanoprobes, Inc Announces Production Agreement With Leading MEMS Foundry 2Carbon Nanoprobes, Inc Announces Production Agreement With Leading MEMS Foundry 3
... Normal;heading 1;heading ... types and experimental ... for standard transfection ... transduction systems. ViraPower ...
... Product Rabbit polyclonal to ... conjugated to KLH, corresponding to amino ... / Specificity Cross-reacts with Rat.Expected to ... Mouse (100% identity with immunogen), Rabbit (100% ...
RayBio Human Angiogenesis Antibody Array 2.1 (8 array membranes) with Accessory, detects 23 angiogenic factors (for lysate) Class: Antibody Array Products Product Group: Antibody Array...
... Inventory Racks for cryogenic vials. ... cardboard or stainless steel boxes ... cryo vials. Vapor phase ... Platform risers to be ...
Biology Products: