Navigation Links
Study challenges long-held assumption about competition in disturbed ecosystems
Date:6/28/2010

role of competition between species under disturbance. Disturbance was imposed by the application of sound energy to the small ecosystems at 11 different levels, ranging from weak disturbances that had little effect on most species to strong disturbances that caused the direct extinction of most species.

First, the researchers placed all of the protist species in separate microcosms for one month and measured each species' change in population density to assess the ability of each to cope with disturbance. Next, the researchers assessed the competitive ability of species by compelling pairs of species to battle for resources for 10 weeks in the absence of disturbance.

The final set of experiments subjected groups of protist species to both disturbance and competition. The population densities of 11 species -- including three Paramecium species -- in each of 55 microcosms were recorded for five months. The results of the multi-species experiment showed that the number of species decreased with increased disturbance and that most species were no longer present across most levels of disturbance.

"One might think that the observed decline of species diversity with disturbance was because high levels of disturbances directly eliminated most or all species. But this idea was not supported by our first set of experiments, which showed that several species were able to sustain viable populations even at the highest disturbance intensities when they were not with other species," explained Jiang.

Instead, the species extinctions that occurred through different levels of disturbance could be partly attributed to competition between species. And the rate of extinctions attributable to competition was greater at higher levels of disturbance.

The findings contradict the intermediate disturbance hypothesis, which suggests that at high levels of disturbance, the species that survive will be those that are hardy under d
'/>"/>

Contact: Abby Vogel Robinson
abby@innovate.gatech.edu
404-385-3364
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
2. A study by the MUHC and McGill University opens a new door to understanding cancer
3. Study begins to reveal clues to the cause and progression of sepsis
4. Clones on task serve greater good, evolutionary study shows
5. New study warns limited carbon market puts 20 percent of tropical forest at risk
6. New study examines how rearing environment can alter navigation
7. Study links cat disease to flame retardants in furniture and to pet food
8. New continent and species discovered in Atlantic study
9. Study shows link between alcohol consumption and hiv disease progression
10. Feeling hot, hot, hot: New study suggests ways to control fever-induced seizures
11. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study challenges long-held assumption about competition in disturbed ecosystems
(Date:12/10/2014)... , Dec. 08, 2014 Research and ... the addition of the "Biometrics Market in ... http://photos.prnewswire.com/prnh/20130307/600769 ... projects such as rural banking and upgradation of ... trends witnessed in the market. Besides the aforementioned ...
(Date:12/3/2014)... 2014   Marvin Test Solutions , a ... for military, aerospace, and manufacturing organizations, today announced ... TS-900 PXI semiconductor test platform . The ... systems to customers at a fraction of the ... ATE. "Our semiconductor customers asked ...
(Date:11/21/2014)... , Nov. 20, 2014 C-Labs LLC, ... the Internet of Things (IoT), today announced the appointment ... chief operating officer. Previously a strategic advisor to the ... and operations. Mr. Traynor is based out of the ... He reports to Chris Muench , Chief Executive ...
Breaking Biology News(10 mins):Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3C-Labs Names Former Microsoft and Bsquare Executive as Chief Operating Officer 2
... the most important paradigms of contemporary society, given the large ... and finally thrown way, this type of waste not being ... working in the recycling sector will be able to save ... new system developed by Tecnalia Research & Innovation. This ...
... COPENHAGEN, DENMARKNatural products marketed as plant growth enhancers ... typically produced by small companies with limited research ... nor have claims about product effectiveness been documented ... Copenhagen investigated the growth regulatory effect of Tea ...
... from Bishop Museum, Honolulu has found the world,s ... world,s smallest tetrapods (non-fish vertebrates). The frogs belong to the genus ... adults of the two new species - named Paedophryne dekot ... length. The study was published in the open access journal ...
Cached Biology News:1,200 recycling sector companies will save up to 10 percent thanks to a new system developed by Tecnalia 2Plant growth affected by tea seed powder 2World's smallest frogs discovered in New Guinea 2
(Date:12/19/2014)... Dec. 18, 2014 Relmada Therapeutics, Inc. (OTCQB: ... treatment of chronic pain, announced the results of its ... "This was a transformational year in Relmada,s history and ... our company," said Sergio Traversa , chief executive ... executed on key financial, human resource and clinical development ...
(Date:12/17/2014)... Based on the revenues gained from ... is dominated by four major players contributing to ... players include GE Healthcare (U.K.), Siemens AG (Germany), ... Full Report Copy at http://www.marketsandmarkets.com/Market-Reports/surgical-imaging-market-210534462.html , ... attributed to its strong product portfolio, which includes ...
(Date:12/17/2014)... (PRWEB) December 17, 2014 Achim Noack ... administration for Stoller Group. In this position, Noack will ... on administrative matters, develop marketing strategy and supervise global ... , “Achim has tremendous knowledge and experience in ... Stoller Group. “His experience and innovative thinking will be ...
(Date:12/17/2014)... Once more, EMAAR has selected ... waste water treatment plant to phase one of BayLaSun, ... Two years ago Bioshaft successfully supplied and operated a ... residential towers with an occupancy of 900 residences. ... gallons per day and was signed on September 16th, ...
Breaking Biology Technology:Relmada Therapeutics Announces Results of Annual Shareholders Meeting 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 4Achim Noack Joins Stoller Group as Global Vice President of Marketing and Administration 2
... Fla., Oct. 30 Pasteuria Bioscience, Inc., (http://www.pasteuriabio.com ... for agriculture,s largest unmet pest problem, announced,today that ... the new Chief,Executive Officer. Dr. Duncan has also ... succeeds Dr. Kelly Smith who will remain active ...
... NEW YORK and MONTREAL, Oct. 30 /PRNewswire-FirstCall/ - ... 30% interest in,Bacteria Bank Ltd. Bacteria Bank ... over ten,thousand cryogenically stored bacteria for use in ... headed by Dr. Karl Weiss a world,renowned bacteriologist. ...
... SAN DIEGO, Oct. 30 CryoCor, Inc. (Nasdaq:,CRYO), ... of cardiac,arrhythmias, announced today that Edward F. Brennan, ... Chief Financial Officer, are,scheduled to present at the ... York, NY on Tuesday, November 6, 2007 at ...
Cached Biology Technology:Pasteuria Bioscience Taps New CEO David N. Duncan 2Pasteuria Bioscience Taps New CEO David N. Duncan 3ICBS acquires 30% interest in Bacteria Bank Ltd. 2CryoCor to Present at CIBC World Markets 18th Annual Healthcare Conference 2
... Shimadzu Biotech presents PsiPort Mass Directed ... review and data acquisition system designed ... for the life science and pharmaceutical ... designed specifically to simplify high throughput ...
... Anti-M13 polyclonal antibody was derived from rabbit ... particles.Recombinant protein domains such as antibody fragments ... pIII and displayed on phage using phagemid-based ... utilized in the Ph.D. libraries. Anti-M13 pIII ...
... The Rapid DNA Ligation Kit ... blunt-end DNA fragments in just ... Depending on the DNA ... concentration) or concatemeric (high DNA ...
... catalyzes the transfer of the ... 5-terminus of polynucleotides or to ... The enzyme, purified from recombinant ... to phosphorylate RNA, DNA and ...
Biology Products: