Navigation Links
Stress and trade-offs explain life's diversity: New Smithsonian model
Date:2/16/2010

Plants and people alike face critical choices as they reproduce: to make a few big, well-provisioned seedsor babies--or many small, poorly-provisioned ones. Different species make strikingly different choices, resulting in a great diversity of life forms: Darwin's "endless forms most beautiful.

Helene Muller-Landau, staff scientist at the Smithsonian Tropical Research Institute argues that these diverse strategies coexist because different levels of stress favor different choices.

"I love to figure out the reasons behind patterns I see in the forest," said Muller-Landau, who, as head of the HSBC Climate Partnership's effort to quantify carbon in forests worldwide, has traveled to forests in China, Malaysia, Ecuador, Panama and beyond. "The mathematical model I've developed explains why different plant species have different size seeds, and may also provide insight into the variation in offspring size and provisioning among animal species."

Coconut palms produce enormous seeds while figs produce tiny seeds. Muller-Landau wasn't happy with the textbook explanation that a tradeoff between competitive ability and seed arrival at a site accounts for this range of seed sizes: "The standard explanation is that big seeds beat out small seeds everywhere that the big seeds arrivebut that just isn't always the case," she explains. "Big seeds don't necessarily do any better than small seeds when conditions are good. Where big seeds really have the advantage is in stressful conditions like shade or drought small seeds often can't make it at all at stressful sites. In contrast, small-seeded species have an advantage at favorable sites, just because they've got more seeds in the game."

"This simple, elegant theory, so well grounded in sound natural history, reminds me of the glory days of Robert MacArthur. It is a considerable advance in our understanding of the contrast between fugitive ("r") and equilibrium ("K") species and
'/>"/>

Contact: Beth King
kingb@si.edu
011-507-6673-8514
Smithsonian Tropical Research Institute
Source:Eurekalert  

Page: 1 2

Related biology news :

1. High sensitivity to stress isnt always bad for children
2. Stress peptide and receptor may have role in diabetes
3. Post-traumatic stress disorder diagnosed with magnetism
4. A new method to measure childhood stress
5. Ford and MIT Team Up To Improve Safety by Reducing Driver Stress
6. Studying hair of ancient Peruvians answers questions about stress
7. Seeing family for the holidays? Scientists discover how the stress might kill you
8. The benefits of stress ... in plants
9. New evidence that dark chocolate helps ease emotional stress
10. Prolonged stress sparks ER to release calcium stores and induce cell death in aging-related diseases
11. New method monitors early sign of oxidative stress in cancer
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Stress and trade-offs explain life's diversity: New Smithsonian model
(Date:9/30/2014)... pregnanteven with IVF? Here,s some hope: A new research ... The FASEB Journal , explains how scientists developed ... PAWP, which induced embryo development in human and mouse ... by the sperm cell during fertilization. , "We believe ... paradigm shift in our understanding of human fertilization by ...
(Date:9/30/2014)... KONG , Sept. 30, 2014 Winners of ... Economist Events, Innovation Summit scheduled to take place at the JW ... the summit, the award winners will share their experiences and the ... who have made a proven innovation over the past decade, will ... the night before the summit. It will be the first ...
(Date:9/29/2014)... According to a NASA story from 2009, "human activities in ... fire emissions issue. Palm oil is increasingly grown for use ... fats in processed foods. It has become the most widely ... in recent years to surpass that of soybean oil. , ... has to be cleared to grow the crop, and the ...
Breaking Biology News(10 mins):Synthetic sperm protein raises the chance for successful in vitro fertilization 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 3Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 4Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 5Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 6Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 7
... announced promising data from a clinical study showing ... cells and immune cells were well tolerated and ... with metastatic melanoma whose disease had been minimized ... entitled "Phase II Trial of Dendritic Cells Loaded ...
... , , , ... http://www.neurotechnology.com ), a biometric identification technologies provider, ... engine for the Indonesian Integrated Biometric Passport Issuance System. ... X/LINK Software, working with ICT Solution Provider PT. Berca Hardayaperkasa, ...
... developed to perform a wide range of medical uses ... Rather than settling for just one of these, researchers ... in one tiny package. , The result is ... for medical imaging and therapy. The structure is described ...
Cached Biology News:Study shows cancer vaccines led to long-term survival for patients with metastatic melanoma 2Indonesia Now Using MegaMatcher Biometric Technology in Integrated Passport Issuance System 2Indonesia Now Using MegaMatcher Biometric Technology in Integrated Passport Issuance System 3Indonesia Now Using MegaMatcher Biometric Technology in Integrated Passport Issuance System 4All-in-1 nanoparticle: A Swiss Army knife for nanomedicine 2All-in-1 nanoparticle: A Swiss Army knife for nanomedicine 3
(Date:10/1/2014)... New applications of structures and materials ... in nature over millennia are featured in a ... applications in biophotonics in the October issue of the ... published by SPIE, the international society for optics and ... peer-reviewed articles are accessible via open access. , “Biomimetic ...
(Date:10/1/2014)... San Francisco, California (PRWEB) October 01, 2014 ... grant from the National Science Foundation to expand their ... approaches to build and modify DNA. The Small Business ... help commercialize the “j5” technology under exclusive license from ... the Joint BioEnergy Institute , an LBNL laboratory ...
(Date:10/1/2014)... 2014 Industry leaders from ... engage around the theme, ,Commercial Opportunities in the Era ... Elsevier , a world-leading provider of ... host a gathering of some of the industry,s most ... healthcare today and in the future. The ...
(Date:9/30/2014)... German . ... have demonstrated a new kind of building block for ... chips could be based on three-dimensional arrangements of nanometer-scale ... of the semiconductor industry CMOS fabrication of silicon ... collaborators at the University of Notre Dame are exploring ...
Breaking Biology Technology:Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 2Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 3TeselaGen Receives $750k NSF SBIR Phase II Award 2TeselaGen Receives $750k NSF SBIR Phase II Award 3Elsevier Healthcare and Pharmaceutical Economics Conference 2014 To Convene Industry Leaders to Discuss Top Healthcare Business Issues 2Elsevier Healthcare and Pharmaceutical Economics Conference 2014 To Convene Industry Leaders to Discuss Top Healthcare Business Issues 3A new dimension for integrated circuits: 3-D nanomagnetic logic 2A new dimension for integrated circuits: 3-D nanomagnetic logic 3
... , , , , , , ... Ependorf Micromanipulator for electro-physiology, , PatchMan, was tested ... Chemistry in Gttingen (Germany)., , , , , ... The Micromanipulator PatchMan was used at MPI for a variety of patch clamp ...
...
... CELLocate Log Sheets for Easily Locating Adhererent , Cells ... , , , ... cells that have been used for microinjection. These ... Using the CELLocate protocol blocks , with the ...
Cached Biology Technology:PatchMan - Test Report 2
... of DNA from agarose gels The SpinPrep Gel ... 150 bp to > 12,000 bp in size from ... the gel slice, followed by adsorption of the DNA ... After a wash step, the purified DNA is eluted ...
Fujifilm BAS-1800II provides the ideal configuration for a low-cost imager that requires only a small amount of space in the laboratory. The small imager for accurate high-throughput screening...
When added to StemSep T Cell Enrichment cocktail, human TCRab TAC is designed to deplete human TCRab from samples to isolate gd T cells....
... a compact and self-contained multichannel pipettor. ... unique flow-through device, which allows extremely ... system. Optional refill system and ... Will be upgradable to with Tecans ...
Biology Products: