HOME >> BIOLOGY >> NEWS
Diversity of trees in forests may be caused by soil pathogens, IU biologists find

BLOOMINGTON, Ind. -- Microbes in the soil beneath a parent tree may kill most of the tree's seedlings in that particular area. This would clear the way for unaffected seeds of other species to take root and flourish near that tree, thereby promoting diversity of trees in forests, according to a study published in the March 16 issue of the journal Nature by Indiana University biologists Alissa Packer and Keith Clay.

The study is described in an article on Nature's Web site at http://helix.nature.com/nsu/000316/000316-12.html

"We showed that a soil pathogen causes the patterns of seedling mortality that we observed in a temperate tree, the black cherry -- high mortality close to the parent tree and low mortality farther away," said Clay, professor of biology. "Animal predators and herbivores may be less important than microbial pathogens in the soil in creating the diversity of tree species in temperate forests. Our results provide the most complete evidence that native pathogens influence tree distributions."

This work has both national and international significance because it extends to temperate forests one of the best-known ideas in ecology, the Janzen-Connell hypothesis. According to this hypothesis, the diversity of tropical forests is enhanced by the presence of host-specific natural enemies that kill offspring around parental trees, creating opportunities for other species to become established.

"While this hypothesis has often been tested in tropical forests, with some supporting results, our study demonstrates for the first time that the same process can occur in temperate forests," Clay said.

Black cherry (Prunus serotina) produces large numbers of bird-distributed fruits throughout the forests of eastern North America. Preliminary studies showed that black cherry seedlings experience high mortality in soil collected beneath black cherry adults, but low mortality in s
'"/>

Contact: Hal Kibbey
hkibbey@indiana.edu
812-855-0074
Indiana University
19-Mar-2000


Page: 1 2 3

Related biology news :

1. Fostering Diversity in the Sciences Symposium
2. Diversity: What people, grain sorghum have in common
3. Diversity hot spots at cold seeps?
4. Diversity of species triumphs
5. Undiscovered Biological Diversity: A Symposium On Bioprospecting
6. New Areas Of High Biological Diversity Discovered
7. Little-Explored African Genetic Diversity May Hold Key To Human Origins, Medical Questions
8. "Discovering Biological Diversity" Is AAAS Topic For USGS Manager
9. Study: Emission of smog ingredients from trees is increasing rapidly
10. Plumbing trees plumbing reveals their engineering skill
11. An exotic grass kills trees by hijacking their water

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Diversity trees forests may caused soil pathogens biologists find

(Date:11/6/2014)... a predator. Except when that predator runs so fast that ... its size, is the fastest creature on Earth. Some of ... (at about five miles per hour). The fastest human can ... from the tiger beetle, a person would have to hit ... a problem. At peak speeds, everything becomes a blur. They ...
(Date:11/5/2014)... Fidel Santamaria, associate professor of biology in the ... researchers in the nation selected to receive a ... Grant for Exploratory Research (EAGER). The funding supports ... support researchers to create new technology that will ... Santamaria, complex behaviors in neuroscience are broken into ...
(Date:11/5/2014)... great diversity in their ability to identify scents and ... in their perceptual evaluation of odors, with women outperforming ... , Sex differences in olfactory detection may play a ... to one,s perception of smell, which is naturally linked ... has been suggested to be cognitive or emotional, rather ...
Breaking Biology News(10 mins):The tiger beetle: Too fast to see 2UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3The female nose always knows: Do women have more olfactory neurons? 2
(Date:11/22/2014)... (PRWEB) November 21, 2014 CannLabs, ... cloud based analytics and scientific testing methodologies relating to ... for a $750,000 line of credit from an existing ... pleased to have secured this commitment from one of ... Officer of CannLabs. “This capital will help accelerate our ...
(Date:11/22/2014)... Respiratory therapy students will soon ... of life-like respiratory ailments using the latest in ... Rapids-based, Michigan Instruments Inc. developers of the world-renowned ... respiratory simulation units to the pro-gram, which cost ... Muskegon Community College are collaborating to offer Muskegon’s ...
(Date:11/21/2014)... , Nov. 21, 2014   TRU-D SmartUVC LLC ... their superbug-killing UVC automated disinfection robot, TRU-D SmartUVC, at FIS ... from Nov. 23 to 26 at Stand 23. ... United Kingdom,s largest infection-related event of ... societies to one of the leading events of its type ...
(Date:11/21/2014)... November 20, 2014 The ... policy research organization representing leading California academic institutions, ... PwC US today released a report ... sciences industry growth. The trend shows a 4 ... 2015 California Biomedical Industry Report indicates that, ...
Breaking Biology Technology:CannLabs Secures $750,000 Line Of Credit 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 3TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 2TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 3California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 2California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 3California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 4
Cached News: