Navigation Links
Forest tree species diversity depends on individual variation
Date:2/25/2010

It's a paradox that's puzzled scientists for a half-century.

Models clearly show that the coexistence of competing species depends on those species responding differently to the availability of resources. Then why do studies comparing competing tree species draw a blank?

Competitors like black gums and red maples have coexisted for millennia in the shaded understories of eastern U.S. forests, yet species-level data offer scant proof that they respond differently to environmental fluctuations that limit access to light, soil moisture and other essential resources.

These are the very differences required for their long-term coexistence. Are the models and theory flawed? Or is it the data?

A paper in this week's issue of the journal Science offers new insights that may resolve the puzzle.

"Species differences do exist, consistent with theory, but species-level data don't show them," says forest ecologist James Clark of Duke University, the paper's author. In order to see them, he says, you have to go to the individual level.

"Scientists working to address pressing ecological issues, such as the spread of invasive species, will benefit from this finding," says Todd Crowl, program director in the National Science Foundation (NSF)'s Division of Environmental Biology, which funded the research.

Species-level studies--the preferred approach in nearly all past research on forest tree diversity--rely on average responses from sample populations to infer information such as average growth, reproduction and survival rates for entire species over time.

They're useful for many purposes, Clark says, but because they assess species' responses in only the handful of environmental dimensions that can be measured, they miss most of the subtle ways in which species differ.

"The environment varies in thousands of ways," he says. "Species can differ in how they respond in all these dimensions, a
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. New research reveals threat to monkey numbers from forest decline
2. Presence of snails points to forest recovery
3. Ecologists discover forests are growing faster
4. Rwandas Forest of Hope to expand by 21 percent, begin corridor for endangered chimpanzees
5. Effects of forest fire on carbon emissions, climate impacts often overestimated
6. Seeing the forest through the trees and seeing the trees through the leaves
7. Northern forests do not benefit from lengthening growing season
8. First phase of pan-tropical forest mapping debuting at COP15
9. Breakthrough in monitoring tropical deforestation announced in Copenhagen
10. Tropical forests affected by habitat fragmentation store less biomass and carbon dioxide
11. Forest deal at Copenhagen must avoid creating carbon refugees
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/24/2014)... TORONTO, June 24, 2014 Some sticky research out ... fight against a certain species of toxic grass fungus: ... this month,s Biology Letters , "Ungulate saliva inhibits ... when applied to red fescue grass (which hosts a ... results in slower fungus growth and less toxicity. , ...
(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 ...
(Date:7/24/2014)... fire hazard in the United States, wildland managers often ... and suppressed trees (ladder fuels). These cuttings and ... low fire danger in order to dispose of the ... pollutants, managers often cover all or part of the ... as agricultural plastic, in order to keep water out. ...
Breaking Biology News(10 mins):Moose drool inhibits growth of toxic fungus: York U research 2UTHealth Dr. Bhavani Iyer awarded low vision grant 2Study gives new perspective on agricultural plastic, debris burning, and air quality 2
... and a half acres of Appalachia have been strip-mined, whole ... and communities devastated. Not exactly a promising place for a ... For his startling and bold proposal to clean-up this ... of Appalachia, John Todd, a research professor in the Rubenstein ...
... drug reverses the brain dysfunction inflicted by a genetic ... of TSC patients also suffer from autism, the findings ... autism. Nature Medicine publishes the findings ... mouse model for TSC, the scientists tested rapamycin, a ...
... the Smithsonian,s National Zoo detected a secondary rise in ... Mei Xiang (may-SHONG) earlier this month. The results from ... believe the hormone rise indicates that it would be ... to a cub or comes to the end of ...
Cached Biology News:Buckminster Fuller takes on big coal 2Buckminster Fuller takes on big coal 3Drug reverses mental retardation caused by genetic disorder 2
(Date:7/24/2014)... 2014 Research and Markets has ... Proteomics Analytical Instruments Market 2014-2018" report to their ... Genomics is the study of the gene and ... structure and functions of proteomes or sets of proteins ... Genomics involves the mapping of genes and DNA sequencing ...
(Date:7/24/2014)... PARK, Calif. , July 24, 2014 ... seven-year contract with the National Institute of Allergy and ... Health, to conduct preclinical development of potential therapies for ... of drugs to treat HIV and AIDS and the ... well as microbicides for preventing sexual transmission of HIV. ...
(Date:7/24/2014)... Francisco, CA (PRWEB) July 24, 2014 ... to be semi-finalists in Livestrong’s Big C Competition. Out ... Health are each headed to the semi-final round. In ... Livestrong’s exclusive three-month accelerator program, complete with mentoring from ... , As part of the angelMD commitment to ...
(Date:7/24/2014)... 2014  Neogen Corporation (Nasdaq: NEOG ) ... potential revenue from new rodenticide research are premature. In ... on July 22, 2014, Neogen,s CEO commented about several ... "It was my intent Tuesday at our ... a new type of rodenticide, but certainly not to ...
Breaking Biology Technology:Global Genomics and Proteomics Analytical Instruments Market 2014-2018: Key Vendors are Agilent, Bio-Rad , F. Hoffmann, La Roche, Illumina, PerkinElmer and Thermo Fisher Scientific 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 33 angelMD Startups Make Livestrong Big C Semi-finals 2Neogen comments on SenesTech 2
... Brad Thompson, President,and CEO of Oncolytics Biotech Inc. (TSX: ... Company at the Maxim Group Growth Conference at,2:30 p.m. ... being held at the,Grand Hyatt Hotel in New York., ... is available at, http://www.wsw.com/webcast/maxim/oncy/ on the company,s website ...
... Engineering and Operations Appointed -, CLINTON, N.J., ... appointment of Michael Kennedy as Senior Vice President,Engineering ... responsible for,drug-device technology strategy and development., "Michael,s ... critical care as we continue to advance our ...
... Oct. 2 ,ImpediMed Ltd, a pioneer in ... Inc., a global leader in science-based,nutraceutical products, ... announced an agreement to distribute ImpediMed technology,in ... affiliate, Health,World, Ltd, has been a long-standing ...
Cached Biology Technology:Media Advisory - Oncolytics Biotech Inc. to Present at Maxim Group Growth Conference 2Ikaria Strengthens Executive Leadership Team 2ImpediMed and Metagenics Announce Agreement 2
Form: Ready to use Applications: ELISA...
Form: Ready to use Applications: ELISA...
X-prolyl aminopeptidase (aminopeptidase P) 1, soluble...
2,4,6, Trinitrophenyl hapten is conjugated to lipopolysaccharide (LPS)....
Biology Products: