Navigation Links
Confirmed: How plant communities endure stress
Date:1/30/2013

PROVIDENCE, R.I. [Brown University] Ecology is rife with predation, competition, and other dramatic "negative interactions," but those alone do not determine the course life on Earth. Organisms sometimes benefit each other, too, and according to the Stress Gradient Hypothesis, their "positive interactions" become measurably more influential when ecosystems become threatened by conditions such as drought. Ecologists have argued about the hypothesis ever since Brown University ecologist Mark Bertness co-proposed it in 1994; Bertness says a large new global meta-analysis he co-authored in Ecology Letters definitively shows that it is true.

The evidence, principally analyzed by former Brown visiting graduate student Qiang He of Shanghai Jiao Tong University in China, comes from 206 studies of 727 shifts of plant interactions amid varying degrees, or gradients, of stress on six continents. Examining the data from each paper and contacting original authors when necessary, He determined the overall trends across the many experiments.

In the vast majority of studies, as stress increased, the significance of interactions shifted toward mutual support in that positive interactions, such as those that promoted neighbors' survival, strengthened in influence, and negative interactions, such as those that hindered neighbors' growth, weakened. In some studies, stress did not change interactions, but negative interactions never increased as stress did, no matter what kinds of plants were involved, what kinds of conditions they were under, or where they were.

"Our results show that plant interactions generally change with increased environmental stress and always in the direction of an outright shift to facilitation (typical for survival responses) or a reduction in competition (typical from growth responses)," the authors wrote in the paper published online. "We never observed an increase in competition at higher stress. These findings wer
'/>"/>

Contact: David Orenstein
david_orenstein@brown.edu
401-863-1862
Brown University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. USDA grant advancing deadly plant disease, insect research
2. Breakthrough: How salt stops plant growth
3. Plants adapt to drought but limits are looming, study finds
4. How the protein transport machinery in the chloroplasts of higher plants developed
5. Giant tobacco plants that stay young forever
6. Invading species can extinguish native plants despite recent reports
7. Bugs need symbiotic bacteria to exploit plant seeds
8. Low extinction rates made California a refuge for diverse plant species
9. Study finds Jurassic ecosystems were similar to modern: Animals flourish among lush plants
10. Improving DNA amplification from problematic plants
11. Scientists join forces to bring plant movement to light
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Confirmed: How plant communities endure stress
(Date:8/20/2014)... are visible in in this image of the Para ... these were most likely intentionally set in order to ... forest or stand of trees where the land is ... include conversion of forestland to farms, ranches, or urban ... green of the Amazon Rainforest in the middle of ...
(Date:8/20/2014)... scientists have discovered that acral melanomas the rare type ... are genetically distinct from other more common types of ... in the journal Pigment Cell & Melanoma Research . ... hands, soles of the feet, nail-beds and other hairless parts ... it,s not caused by UV damage from the sun. , ...
(Date:8/20/2014)... Tech,s Wu Feng has built upon a National Science ... the Cloud" program, and synergistically complemented it with subsequent ... Air Force on "big computing" for mini-drones and a ... of Health on "big data" for the life sciences. ... from each grant, he was able to tell a ...
Breaking Biology News(10 mins):Scientists learn more about rare skin cancer that killed Bob Marley 2The internet was delivered to the masses; parallel computing is not far behind 2The internet was delivered to the masses; parallel computing is not far behind 3The internet was delivered to the masses; parallel computing is not far behind 4
... , July 14 Orbel,s Hi-Flex™ Fabric over Foam ... and wrapped with a durable high performance copper-nickel plated conductive fabric. ... low compression forces making them ideal for shielding seams, doors and ... , , ...
... U.S. Department of Energy,s Savannah River National Laboratory ... State University to decrease mold growth in flooded ... Funded by the Department of Homeland Security (DHS) ... State University asked SRNL and Tuskegee University to ...
... more blood banks to adopt so-called "extended blood group ... and recipients. Their report on a new, automated genetic ... appears in ACS, Analytical Chemistry , a semi-monthly ... most blood banks still use a century-old blood approach ...
Cached Biology News:Orbel Expands Fabric over Foam Gasket Product Line 2SRNL works to decrease hazards from mold in water damaged homes 2
(Date:8/21/2014)... BURLINGTON, Mass. , Aug. 21, 2014 /PRNewswire/ ... in Brazil and ... restrictions. The uptake of several newly approved agents, ... for this indication and the launch of emerging ... asthma markets. In particular, the emerging IL-5 inhibitors ...
(Date:8/21/2014)... Pursuit Solutions ( http://www.pursuit-solutions.com ), a ... for Life Sciences sales and marketing organizations, announced ... Commercial Sales Models” by Peter Robinson, co-founder and ... examines some innovative models used to improve sales ... the pharmaceutical market. Robinson grades the industry on ...
(Date:8/20/2014)... Clintrax Global, Inc., a worldwide provider ... Raleigh, NC , recently announced the addition ... of Administration. As Vice President ... including their alignment with company objectives and policies.  ... an HR executive, specializing in needs assessments, customer ...
(Date:8/20/2014)... Livermore, California (PRWEB) August 20, 2014 ... to develop and apply the most complete climate ... challenging and demanding climate change issues. , Eight ... combining forces with the National Center for Atmospheric ... in the new effort. Other participating national laboratories ...
Breaking Biology Technology:Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 2Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 3Pursuit's Peter Robinson Publishes "Grading Pharma's Use of New Commercial Sales Models" 2Clintrax Global, Inc. Announces Addition to Executive Team 2New Project Is the ACME of Addressing Climate Change 2New Project Is the ACME of Addressing Climate Change 3
... announced,the appointment of David J. Mazzo, Ph.D., as President ... to Regado almost 25,years of experience in the pharmaceutical ... Dr. Mazzo also has served as,President and CEO of ... Co., Ltd. of Japan, a member of the Roche ...
... In Single Port Access Surgery Achieves Another Milestone, ... a pioneer in,the rapidly emerging Single Port Access ... has been granted a CE Mark for its ... laparoscopic surgery, the surgeon makes four to six,"keyhole" ...
... Clinicians to Monitor Activity of New ... Class of Potent Antiretroviral Drugs, SOUTH ... MGRM ) today announced the launch of its,PhenoSense(R) Integrase assay, ... the susceptibility of,HIV to a new and potent class of ...
Cached Biology Technology:David J. Mazzo, Ph.D., Joins Regado Biosciences as President and CEO 2Autonomy(TM) Lapro-Angle(TM) Articulating Laparoscopic Instruments Granted CE Mark 2Monogram Biosciences Launches First Resistance Assay for HIV Integrase Inhibitors 2Monogram Biosciences Launches First Resistance Assay for HIV Integrase Inhibitors 3Monogram Biosciences Launches First Resistance Assay for HIV Integrase Inhibitors 4Monogram Biosciences Launches First Resistance Assay for HIV Integrase Inhibitors 5
... cocktail of 3 siRNAs specifically targeted to ... popular product. The siTrio reagent guarantees you ... target gene when used under standard conditions ... of optimal transfection with one of B-Bridges ...
... collection of phage display libraries, human ... and mouse tissues. All cDNA libraries ... size of cDNA inserts has been ... 1000bp by gel electrophoresis of DNA ...
... stability and convenience from the former kit #17295. ... this problem but also produced some advantages as ... of HRP conjugated antibody from lyophilized product to ... stability of the conjugate has improved so that ...
Mouse monoclonal [BC-4] to Aggrecan xxPEN ( Abpromise for all tested applications). entrezGeneID: 176 SwissProtID: P16112...
Biology Products: