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:12/8/2016)... , Dec. 8, 2016 Market Research Future published a ... The global Mobile Biometric Security and Service Market is expected to ... 2022. Market Highlights: ... , Mobile Biometric Security ... to the increasing need of authentication and security from unwanted cyber ...
(Date:12/8/2016)... , Dec. 8, 2016  Singulex, Inc., the leader ... technology, entered into a license and supply agreement with ... The agreement provides Singulex access to Thermo Scientific BRAHMS ... is used to diagnose systemic bacterial infection ... to aid in assessing the risk of ...
(Date:12/7/2016)... India , December 7, 2016 According to a ... Machine Learning), Software Tool (Facial Expression, Voice Recognition), Service, Application Area, End User, ... is estimated to grow from USD 6.72 Billion in 2016 to USD 36.07 ... Continue Reading ... ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... -- The Board of Directors of the Pittsburgh Life ... only pure life sciences investment firm, today announced ... plan developed by the Nominating and Governance Committee over ... F. Jordan is selected to serve as President ... , who is elected to the position of Executive ...
(Date:12/8/2016)... LONDON , Dec. 8, 2016 This report ... following Product Segments: Acid Based (Humic, Amino, & Fulvic), Extract ... by the following Crop Types: Ornamental & Turf, Row Crops, ... US, Canada , Japan ... , Latin America , and Rest of ...
(Date:12/8/2016)... ... December 08, 2016 , ... Lajollacooks4u, San Diego’s premier team building events ... building events, new program offerings and company expansion. , This is largely ... include groups of over 30 people. Ever since, Lajollacooks4u has seen significant demand for ...
(Date:12/8/2016)... SAN DIEGO, Dec. 8, 2016  OncoSec Medical ... company developing DNA-based intratumoral cancer immunotherapies, today announced ... "We are delivering on our ... melanoma with ImmunoPulse® IL-12. We are pleased with ... melanoma combination trial, and we are focused on ...
Breaking Biology Technology:
Cached News: