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:9/19/2014)... the sake of fairness per se but in order ... Frans de Waal, PhD, and Sarah Brosnan, PhD, co-authors ... is defined as a negative reaction to unequal outcomes. ... , Their conclusion comes after the co-authors reviewed more ... it is the evolution of forestalling partner dissatisfaction with ...
(Date:9/19/2014)... study shows that legume plants regulate their symbiotic ... that are transmitted through the plant structure from ... of bacteria-holding nodules in the roots. This collaborative ... Institute for Basic Biology, the Graduate University for ... Sustainable Resource Science in Japan. , Legumes, ...
(Date:9/18/2014)... A sleep-promoting circuit located deep in the primitive ... Discovered by researchers at Harvard School of Medicine and ... Sciences, this is only the second "sleep node" identified ... both necessary and sufficient to produce deep sleep. , ... the study demonstrates that fully half of all of ...
Breaking Biology News(10 mins):Evolution of responses to (un)fairness 2Evolution of responses to (un)fairness 3For legume plants, a new route from shoot to root 2No sedative necessary: Scientists discover new 'sleep node' in the brain 2
... number of rivers and lakes are being invaded by exotic ... Such species represent a threat to native species, as they ... the case of the mudsnail Potamopyrgus antipodarum ... and has spread throughout rivers, lakes or streams in Europe, ...
... found that silicone foul release coatings may be an important ... water and hydropower infrastructure. Allen D. Skaja, Ph.D., PCS, of ... metal alloys over three years at Parker Dam on the ... to reduce the rate of mussel settlement, and any attached ...
... Calif. ( www.ucr.edu ) Research by Nosang ... Riverside, Bourns College of Engineering, has enabled a ... that can detect small quantities of harmful airborne ... Economy Corporation company, has completed the prototype which ...
Cached Biology News:Survival without water: A key trait of an aquatic invader to spread 2'Electronic nose' prototype developed 2
(Date:9/20/2014)... (PRWEB) September 20, 2014 MediVet ... to perform a groundbreaking surgery at the specialized Wolvega ... mare's superficial digital flexor tendon was ruptured 90% and ... of injury is a death sentence for a horse. ... stem cell treatments . This revolutionary regenerative ...
(Date:9/19/2014)... to disease risks, the biological characteristics people care most ... for heightthe textbook example of a complex traitattributes like ... multiple genetic and environmental influences, making it challenging to ... geneticists typically mate two individuals that differ in key ... then study their descendents, looking for genes that tend ...
(Date:9/19/2014)... Chips that use light, rather than electricity, to ... and energy efficiency is a growing concern as ... chief components of optical circuits light emitters, ... to build. One promising light source for optical ... optical properties when deposited as a single, atom-thick ...
(Date:9/19/2014)... YORK , Sept. 19, 2014  An entire ... forms of inherited neuropathies – Charcot-Marie-Tooth disease (CMT) – ... and legs, causing extreme muscle atrophy, weakness, and foot ... the US and millions worldwide. CMT is a progressive ... of their legs, requiring mobility devices such as leg ...
Breaking Biology Technology:World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 2World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 3Want to link genes to complex traits? Start with more diversity 2Toward optical chips 2Toward optical chips 3September is Charcot-Marie-Tooth (CMT) Awareness Month - Scheduled events, activities and important partnerships announced throughout the month! 2
... 15, 2006, the Supreme Court in eBay Inc. v. ... proves infringement should be granted an injunction must be ... (1) irreparable injury; (2) inadequacy of remedies at law; ... The Court rejected the Federal Circuit's approach that an ...
... encounter, we reviewed the list of the leading Big Pharma companies of ... some of the leading pharmaceuticals products and deals of 2005. , ... Product/Company Disease Area ... Lipitor (Pfizer) Cholesterol Reduction $12.9 +6% ...
... Inc., a developer of protein chip technologies, has ... the National Institutes of Health to develop a test ... ,An estimated 50 million Americans suffer from mild to ... especially for children and senior citizens. GenTel's protein chips ...
Cached Biology Technology:Supreme Court decision in eBay case could affect value of patents 2Big Pharma's continued hunger and search for new products 2Big Pharma's continued hunger and search for new products 3Big Pharma's continued hunger and search for new products 4GenTel gets federal grant to develop allergy test 2GenTel gets federal grant to develop allergy test 3
RAT ANTI MOUSE F4/80 ANTIGEN:BIOTIN Immunogen: Thioglycollate stimulated peritoneal macrophages from C57/BL mice...
SHEEP ANTI FLECAINIDE...
ANTI PIG LDH H4...
RAT ANTI MOUSE F4/80 ANTIGEN:BIOTIN Immunogen: Thioglycollate stimulated peritoneal macrophages from C57/BL mice...
Biology Products: