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:


(Date:6/23/2017)... ARMONK, N.Y. and ITHACA, N.Y. ... IBM ) and Cornell University, a leader in dairy ... combined with bioinformatics designed to help reduce the chances ... breaches. With the onset of this dairy project, Cornell ... the Consortium for Sequencing the Food Supply Chain, a ...
(Date:5/16/2017)...  Veratad Technologies, LLC ( www.veratad.com ), an innovative ... verification solutions, announced today they will participate as a ... thru May 17, 2017, in Washington D.C.,s ... Identity impacts the lives of billions ... evolving digital world, defining identity is critical to nearly ...
(Date:4/24/2017)... , April 24, 2017 Janice ... partner with  Identity Strategy Partners, LLP (IdSP) , ... or without President Trump,s March 6, 2017 ... Entry , refugee vetting can be instilled with greater ... (Right now, all refugee applications are suspended by ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... BOSTON (PRWEB) , ... October 12, 2017 , ... ... name for two-dimensional representations of a complex biological network, a depiction of a ... a big mess,” said Dmitry Korkin, PhD, associate professor of computer science at ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... a United States multicenter, prospective clinical study that demonstrates the accuracy of ... capable of identifying clinically significant acute bacterial and viral respiratory tract infections ...
(Date:10/12/2017)... San Diego, CA (PRWEB) , ... ... ... BioInformatics (https://www.onramp.bio/ ) has launched Rosalind™, the first-ever genomics analysis platform ... eliminating all bioinformatics complexity. Named in honor of pioneering researcher Rosalind Franklin, ...
(Date:10/11/2017)... ... October 11, 2017 , ... Personal eye wash is a basic first aid supply for any ... So which eye do you rinse first if a dangerous substance enters both eyes? It’s ... Wash with its unique dual eye piece. , “Whether its dirt and debris, or ...
Breaking Biology Technology:
Cached News: