Navigation Links
Early warning signs of population collapse
Date:4/10/2013

CAMBRIDGE, MA -- Many factors including climate change, overfishing or loss of food supply can push a wild animal population to the brink of collapse. Ecologists have long sought ways to measure the risk of such a collapse, which could help wildlife and fishery managers take steps to protect endangered populations.

Last year, MIT physicists demonstrated that they could measure a population's risk of collapse by monitoring how fast it recovers from small disturbances, such as a food shortage or overcrowding. However, this strategy would likely require many years of data collection by which time it could be too late to save the population.

In a paper appearing in the April 10 online edition of Nature, the same research team describes a new way to predict the risk of collapse, based on variations in population density in neighboring regions. Such information is easier to obtain than data on population fluctuations over time, making it potentially more useful, according to the researchers.

"Spatial data are more accessible," says Lei Dai, an MIT graduate student in physics and lead author of the study. "You can get them by satellite images, or you could just go out and do a survey."

Led by Jeff Gore, an assistant professor of physics, Dai and Kirill Korolev, a Pappalardo Postdoctoral Fellow, grew yeast in test tubes and tracked the populations as they approached collapse. Yeast cells cooperate with other members of the population: Each of the organisms secretes an enzyme that breaks down sucrose in the environment into smaller sugars that it can use as a food source. All of the yeast benefit from this process, so a population is most successful when it maintains a certain density neither too low nor too high.

In last year's study, the researchers found that in populations of yeast that are subjected to increasingly stressful conditions, populations become less and less resilient to new disturbances until they
'/>"/>

Contact: Sarah McDonnell
s_mcd@mit.edu
617-253-8923
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Brain & Behavior Research Foundation awards nearly $4 million in new NARSAD grants
2. Ocean plankton sponge up nearly twice the carbon currently assumed
3. JCI early table of contents for Mar. 15, 2013
4. More accurate, sensitive DNA test allows early identification of fungus causing WNS
5. Potential early indicator of kidney injury identified
6. Friend or foe: Babies choose sides early
7. NIH awards nearly $2 million to 3 NYC institutions for chronic fatigue syndrome research
8. Early antiretroviral treatment reduces viral reservoirs in HIV-infected teens
9. Early warning system provides 4-month forecast of malaria epidemics in northwest India
10. New model could lead to improved treatment for early stage Alzheimers
11. Prenatal DHA reduces early preterm birth, low birth weight
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/2/2014)... University of Warwick in the UK and the Ruhr-University ... Early Human Development , has found that both ... and the use of mechanical ventilation are key indicators ... abilities are crucial for lifelong academic attainment. Impairments in ... studies of children who are born very preterm (before ...
(Date:9/2/2014)... birds, also known as perching birds, that migrate by ... do in autumn to reach their destinations. This seasonal ... that only make short migratory flights, says researcher Cecilia ... Behavioral Ecology and Sociobiology . , Nilsson, ... a tracking radar to measure over three years the ...
(Date:9/2/2014)... spiky legs and their propensity for eating anything, including ... And now research from North Carolina State University finds ... across the eastern United States. , "The good news ... kind of threat to humans," says Dr. Mary Jane ... author of a paper about the research. , The ...
Breaking Biology News(10 mins):Mechanical ventilation a key indicator for pre-term children's math problems 2Migrating birds sprint in spring, but take things easy in autumn 2Researchers find Asian camel crickets now common in US homes 2
... Exotic bacteria that do not rely on oxygen may have ... early atmosphere, according to a theory that UChicago researcher Albert ... volcanic crater in Siberia. He has found that bacteria ... a surprising twist that scientists must take into account as ...
... WASHINGTON, April 26, 2011 The American Chemical Society ... " Global Challenges/Chemistry Solutions " podcast series showcasing ... friendly production of a key ingredient used to make ... and accompanying website focus on a new way to ...
... Group announced today that four individuals, representing Chile, Mexico ... in Marine Conservation. The 2011 Pew Marine ... dolphin populations, measure the economic and ecological tradeoffs of ... scientific foundation for the establishment of marine protected areas ...
Cached Biology News:Cold case: Siberian hot springs reveal ancient ecology 2Cold case: Siberian hot springs reveal ancient ecology 3Pew announces 2011 recipients of distinguished marine conservation fellowship 2
(Date:9/2/2014)... Quincy, MA (PRWEB) September 02, 2014 ... announced today the signage of a distribution agreement ... Azelis is now distributing Myriant’s bio-succinic acid in ... Kingdom and Ireland, targeting customers in the industrial ... chemical distribution powerhouse, Azelis offers a far-reaching chemical ...
(Date:9/2/2014)... Sept. 2, 2014  Xencor, Inc. (NASDAQ: ... engineered monoclonal antibodies for the treatment of autoimmune ... announced the appointment of Debra Zack , ... appointment of Lloyd Rowland , senior vice ... "Debra,s expertise in biologics clinical development ...
(Date:9/2/2014)... /PRNewswire/ - BIOREM Inc. (TSXV: BRM) ("Biorem" or "the Company") today ... of three large odour control systems for waste water treatment ... orders are consistent with the market resurgence in ... and CEO. "After a difficult period of restraint in our ... see sales growth. Our lower cost structure, technology improvements and ...
(Date:9/2/2014)... Massachusetts , September 2, 2014 ... to BioData,s research and lab management services  ... management service, is pleased to announce the appointment of ... Culot most recently served as VP Marketing and Business ... life science research and clinical applications. Previously, ...
Breaking Biology Technology:Myriant and Azelis Sign European Distribution Agreement for Bio-Succinic Acid 2Xencor Appoints Debra Zack, M.D., Ph.D., Vice President, Clinical Development and Lloyd Rowland, Senior Vice President, Chief Compliance Officer and General Counsel 2Xencor Appoints Debra Zack, M.D., Ph.D., Vice President, Clinical Development and Lloyd Rowland, Senior Vice President, Chief Compliance Officer and General Counsel 3Louis Culot Appointed as BioData's CEO 2
... Monogram,Biosciences, Inc. (Nasdaq: MGRM ) announced today ... Financial Officer, is,scheduled to present a corporate overview ... 13, 2007 at 11:00 a.m. (Eastern Time) at,the ... access the live audio broadcast or the subsequent ...
... CALL DATE: Oct. 31, 2007 TIME: 8:30 a.m. Eastern Time HOST: Dr. ... ... KNDL ),will conduct a telephone conference call and simultaneous webcast Oct. 31,at ... 2007. A question and answer session will follow. (Logo: http://www.newscom.com/cgi-bin/prnh/20030429/KNDLLOGO ...
... leading,management consulting firm specializing in the pharmaceutical and biotech,industries, ... of the best,places to work in the Research Triangle ... ranking third among midsize companies. The award,was presented to ... to Work luncheon and awards ceremony on September 27, ...
Cached Biology Technology:Monogram Biosciences to Present at the JMP Securities Healthcare Conference 2Kendle Invites You to Attend Its Third Quarter 2007 Earnings Conference Call and Webcast 2Campbell Alliance Named 'Best Place to Work' by Triangle Business Journal 2
Recombinant Feline IL-2, CF...
Recombinant Equine IL-4, CF...
Recombinant Rat Leptin, CF...
VACUGENE PUMP 110V, 1 EA. Category: Nucleid Acid Detection Systems....
Biology Products: