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:7/24/2014)... smog-free Los Angeles, where electric cars ply silent freeways, ... heat from beneath the earth, from howling winds and ... study finds that it is technically and economically feasible ... by clean, renewable energy. Published in Energy , ... and reliable energy supply in California that could create ...
(Date:7/24/2014)... own microbial terroir, meaning the microbial populations found on ... product, creating the final flavor according to research published ... Environmental Microbiology . This is the first time investigators ... , Many sake makers inoculate with both bacteria ... the University of California, Davis, but he and his ...
(Date:7/24/2014)... Iyer, O.D., a low vision specialist at The University ... School, has been awarded a grant to help Harris ... eyeglasses, medication or surgery. , Even with corrective lenses, ... best. However, there are a variety of low vision ... help offset their vision loss. , Iyer is using ...
Breaking Biology News(10 mins):Stanford study shows how to power California with wind, water and sun 2Stanford study shows how to power California with wind, water and sun 3Stanford study shows how to power California with wind, water and sun 4The microbes make the sake brewery 2UTHealth Dr. Bhavani Iyer awarded low vision grant 2
(Date:7/24/2014)... 24, 2014  ECC West Africa, LLC (ECC) signed ... with University College Hospital (UCH) Ibadan Board of Management ... finance, design, construct, and operate and maintain a new, ... . Under the first of the 4-phase project, ECC ... funding applications. UCH Ibadan intends to finance and develop ...
(Date:7/24/2014)... A research team led by group leader Yung-Eun ... technology to synthesize sulfur-doped and nitrogen-doped graphenes which ... secondary batteries and fuel cells. Yung-Eun Sung is ... Nanoparticle Research at Institute for Basic Science* (IBS) ... , This achievement has great significance with regards ...
(Date:7/24/2014)... at the University of Delaware, is known worldwide ... engineering, environmental sustainability and electronics. , His early ... a well-defined, crystalline structure. At the atomic scale, ... zeolites can separate molecules with size differences of ... a nanometer), making them useful to the chemical ...
(Date:7/24/2014)... , July 24, 2014 Research ... "Global Cell Culture Market 2014-2018" report to ... Cell culture is the in vitro growth ... as research, cell studies, and biopharmaceutical production. Cell culture ... production. Cell culture instruments and cell culture consumables are ...
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 2Global Cell Culture Market 2014-2018: Key Vendors are Becton, Dickinson and Co, EMD, GE Healthcare, Lonza Group, Sigma Aldrich and Thermo Fisher Scientific 2
Cached News: