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:10/29/2014)... compete with members of their own species. However, ... into their competitive ability. Some individuals are highly ... resources, while others seem to avoid competition, instead ... are left over for them. Moreover, the degree ... to fluctuate considerably over time. A theoretical study ...
(Date:10/28/2014)... in German . ... acquire sufficient food when times are lean? By studying ... d,Ivoire researchers of the Max Planck Institute for Evolutionary ... how great apes can acquire extra energy needed to ... their sleeping nests more en route to breakfast sites ...
(Date:10/28/2014)... be building a hybrid micro-grid which will integrate ... in the region, the hybrid micro-grid will test ... diesel, storage and power-to-gas technologies, and ensure these ... built under the new Renewable Energy Integration Demonstrator- ... located offshore at Semakau Landfill and is expected ...
Breaking Biology News(10 mins):Evolution of competitiveness 2Evolution of competitiveness 3The early chimp gets the fig 2The early chimp gets the fig 3NTU to build region's first renewable energy integration demonstration micro-grid 2NTU to build region's first renewable energy integration demonstration micro-grid 3
... the growing demand for organic food products has led to ... of Science, University of Copenhagen, a European research project will ... of a food product and deciding whether or not it ... as olive oil, coffee and wine are sold at a ...
... Among overweight and obese adults, a diet rich ... and other high-fiber foods, significantly reduces markers of inflammation ... by Fred Hutchinson Cancer Research Center. Such a "low-glycemic-load" ... also increases a hormone that helps regulate the metabolism ...
... Every year, a group of anti-whaling nonprofit organizations that ... spend, by conservative estimates, some $25 million on a ... And every year, commercial whaling not only continues, but ... number of whales harvested annually has doubled since the ...
Cached Biology News:Research prevents eco-fraud 2Research prevents eco-fraud 3A diet rich in slowly digested carbs reduces markers of inflammation in overweight and obese adults 2Can we save the whales by putting a price on them? 2Can we save the whales by putting a price on them? 3
(Date:10/26/2014)... October 26, 2014 The report "Protective ... Application - Global Trends & Forecast to 2019", defines ... and forecasting of volume consumed and value generated. The ... KT in 2014 to 6,701.3 KT by 2019, at ... Browse 91 market data tables and 22 figures spread ...
(Date:10/25/2014)... California (PRWEB) October 23, 2014 ... a specialty pharmaceutical company devoted to bringing new ... partnerships in 2015. , ViaDerma has developed an ... allows for rapid mass transfer of pharmaceutical active ... body to provide immediate localized therapy. The transdermal ...
(Date:10/25/2014)... According to new market research report "Data ... Enterprise, Telecom), by Design Types (Electrical, Mechanical), and ... 3, Tier 4) - Global Forecast to 2019", ... Center Construction Market into various segments with an ... report also identifies the factors driving this market, ...
(Date:10/25/2014)... The Workgroup for Electronic Data ... on the use of health IT to create ... of four new co-chairs to the organization’s Security ... ,     Peter Dumont, Senior Director – Privacy ... Deloitte Consulting LLP ,     Deidre Rodriguez, Director ...
Breaking Biology Technology:Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 2Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 3Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 4ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 2ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 3Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 2Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 3Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 4WEDI Appoints Four New Security and Privacy Workgroup Co-chairs 2
... works how people can tune in to a single ... solved this week in the journal Nature by ... Psychologists have known for decades about the so-called "cocktail ... in which it was coined. It is the remarkable human ...
... are single-cell plants that comprise nature,s smallest and ... thrive is water, light, and air. When bred ... to wastewater treatment to biofuels. Current microalgae breeding ... allowed by the laws of nature. Scientists at ...
... , Expanded clinical study ...   TMC435 and BMS-986094 (formerly ... in clinical trial , ... on the development of high-value treatments for infectious diseases, ...
Cached Biology Technology:How selective hearing works in the brain 2How selective hearing works in the brain 3Medivir Announces TMC435 in an Expanded Clinical Collaboration 2Medivir Announces TMC435 in an Expanded Clinical Collaboration 3Medivir Announces TMC435 in an Expanded Clinical Collaboration 4
Gamma delta T Lymphocytes Purified Anti-Porcine clone MAC320, Isotype Rat IgG 2a , kappa, 0.1 mg Consult technical datasheet for details....
...
SAPK/JNK Antibody...
Molecular Biology grade. Ideally suited for DNA and RNA separation and recovery. High gel strength. Gelling temp. 36C. Melting temp. 88C. EEO: 0.05-0.13 Resolution 0.2-40 kb; Rnase/Dnase: none detec...
Biology Products: