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

isturbed conditions. At low disturbance, the hypothesis suggests that the ecosystem will be dominated by species that are good competitors. At some intermediate disturbance level, the good competitors will have an opportunity to gain a foothold without being destroyed by disturbance, but will not be able to out-compete the hardier species or exclude less-fit species.

In this study, the 11 species differed markedly in their competitive ability and in their ability to tolerate disturbance. When considered together, there was a strong tradeoff between the two traits, according to Jiang.

"Each species was most vulnerable to inter-species competition at its upper disturbance limit, which is when its population density was the most severely reduced," noted Jiang.

While this study provided unique experimental evidence that competition can consistently regulate species extinction and community richness over broad disturbance gradients, three characteristics of this experiment may influence the applicability of these results to other systems, according to Jiang.

First, since the protist species in these experiments competed for shared food resources and affected each other by reducing the availability of those resources, these findings may not apply to communities competing in other ways, such as those physically or chemically fighting with each other. Second, there was no outside immigration into the experimental microcosms, unlike natural communities in which other organisms can join the competition.

Finally, given the size of the microcosms, disturbance in the experiments could be considered "global", which contrasts with the more common situation in nature where disturbance is heterogeneous over an area.

In the future, more attention should be focused on examining other mechanisms that may potentially contribute to intermediate disturbance hypothesis patterns, says Jiang.

"Our results challenge conventiona
'/>"/>

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:7/25/2014)... The routine use of a molecular testing panel ... performing the correct initial surgery for patients with ... University of Pittsburgh Cancer Institute (UPCI), partner with ... Multidisciplinary Thyroid Center and other diagnostic testing agencies, ... initial surgery by 30 percent, according to the ...
(Date:7/24/2014)... loss leads to conflict among people around the world, ... (WCS) Health & Ecosystems: Analysis of Linkages (HEAL) Program ... to tackle global biodiversity decline. , The harvest of ... people and provides protein for more than a billion ... surprise that today,s unprecedented loss of wildlife, is bringing ...
(Date:7/24/2014)... use of native animal species for food or commercial ... significant factor in the decline of many species of ... indicates that more than half of the species being ... hornbills., "By surveying not only the meat made available ... inside the forest by hunters and brought to villages ...
Breaking Biology News(10 mins):Test increases odds of correct surgery for thyroid cancer patients 2Test increases odds of correct surgery for thyroid cancer patients 3New study draws links between wildlife loss and social conflicts 2
... 2013 As an expert in molecular genetics, Colin E. ... Medical Center,s Institute for Regenerative Medicine is to apply the ... human organs. But, with a background specifically in reproductive ... the over-population of homeless dogs and cats. Bishop has been ...
... provides the same quality of fuel for athletes as a ... nutrients that are more commonly found in animal products, according ... (IFT) Annual Meeting & Expo. The research was compiled ... He was unable to attend the meeting, so his presentation ...
... Health has awarded Virginia Commonwealth University a grant totaling ... work which may one day point researchers to ... inflammatory conditions such as rheumatoid arthritis, multiple sclerosis and ... by John Ryan, Ph.D., associate professor in the Department ...
Cached Biology News:Low-cost sterilization method for cats and dogs is focus of new research project 2Monitoring nutrient intake can help vegetarian athletes stay competitive 2VCU receives NIH grant to examine the biology of allergic disease 2
(Date:7/24/2014)... , July 24, 2014  ECC West Africa, LLC ... with University College Hospital (UCH) Ibadan Board ... project to finance, design, construct, and operate and maintain ... Nigeria . Under the first of the 4-phase ... documents and funding applications. UCH Ibadan intends to finance ...
(Date:7/24/2014)... Distinguished Professor of Engineering at the University of ... solve problems in energy engineering, environmental sustainability and ... zeolites, porous rock with a well-defined, crystalline structure. ... so precisely decided that zeolites can separate molecules ... an angstrom (one-tenth of a nanometer), making them ...
(Date:7/24/2014)... 24, 2014 Your cell phone ... modeling lithium-ion battery storage capacity. , New research ... theoretical model created at Lawrence Livermore National ... predicts how carbon components will perform as electrodes. ... the urgent need for higher-performance batteries. Several key ...
(Date:7/24/2014)... 24, 2014 2014 Deep Research ... is a professional and in-depth research report on ... Sulphate basic information, including its definition, classification, ... This research covers the international market analysis, including ... analysis covering macroeconomic environment & economic situation analysis, ...
Breaking Biology Technology:ECC Signs a Contract for the Finance, Design, and Construction of a Premier Cancer Institute in Ibadan, Nigeria 2University of Delaware researcher describes new approach for creating organic zeolites 2Getting More Life out of Lithium-ion Batteries 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 4
... Spanish . , Scientists at the University ... time different antioxidant compounds from foods such as olive oil, ... have used two new techniques, capillary electrophoresis and high resolution ... a great part of the phenolic compounds contained in these ...
... Dec. 8 Transgenomic, Inc. (OTC Bulletin Board: TBIO) announced ... first in a family of mutation detection kits the company ... ® HS DHPLC platform. SURVEYOR Scan technology is ... amplification reaction and hybridization to form heteroduplex DNA molecules in ...
... Dec. 8 PharmAthene, Inc. (NYSE Amex: PIP ) ... medical countermeasures against chemical and biological threats, announced today that ... Time, on Wednesday, December 9, 2009 to provide an update ... The dial-in number for U.S. callers is 866-383-8108 and for ...
Cached Biology Technology:New antioxidant compounds have been identified in foods such as olive oil, honey and nuts 2Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 2Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 3Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 4PharmAthene Announces Updated Time for Conference Call to Review BARDA rPA Decision 2
Tris-Hepes kit of BG-163 & BG-165 (order number BG-166)...
... ideal for both radioactive and nonradioactive labeling ... Provides five pre-mixed nucleotide solutions for flexibility ... 8 cpm/g control DNA using [-32P]-dCTP ... performance of the system Labels 1 ...
Activating Agents, 7-azabenzotriazol-1-yloxy-tris-(pyrrolidino)phosphonium hexafluorophosphate...
... Immunogen: Fusion protein derived from ... ASIP/PAR-3 (atypical PKC isotype-specific interacting protein/ ... not related to the protease-activated-receptors also ... Xenopus (positive controls: Caco-2 MDCK A6 ...
Biology Products: