Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Toward resolving Darwin's 'abominable mystery'

16.09.2010
Patterns of flower biodiversity point to the importance of having 'room to grow'

What, in nature, drives the incredible diversity of flowers? This question has sparked debate since Darwin described flower diversification as an 'abominable mystery.' The answer has become a lot clearer, according to scientists at the University of Calgary whose research on the subject is published today in the on-line edition of the journal Ecology Letters.

Drs. Jana Vamosi and Steven Vamosi of the Department of Biological Sciences have found through extensive statistical analysis that the size of the geographical area is the most important factor when it comes to biodiversity of a particular flowering plant family.

The researchers were looking at the underlying forces at work spurring diversity -- such as why there could be 22,000 varieties of some families of flowers, orchids for example, while there could be only forty species of others, like the buffaloberry family. In other words, what factors have produced today's biodiversity?

"Our research found that the most important factor is available area. The number of species in a lineage is most keenly determined by the size of the continent (or continents) that it occupies," says Jana Vamosi.

Steven Vamosi adds that while the findings of this research mostly shed light on what produces the world's diversity, it may comment on what produces extinction patterns as well.

"The next step is to determine if patterns of extinction risk mirror those observed for diversification, specifically to contrast the relative influence of available area and traits," he says.

Typically, when it comes to explaining the biodiversity of flowering plants, biologists' opinions fall into three different camps: family traits (for example a showy flower versus a plain flower), environment (tropic versus arid climate) or sheer luck in geography (a seed makes it way to a new continent and expands the geographical range of a family).

But the Vamosi research demonstrates that geography isn't the only answer, traits of the family came in a close second to geography. Traits that may encourage greater diversity are known as "key innovations" and scientists have hypothesized that some families possess more species because they are herbs, possess fleshy fruits (such as an apple or peach), or that their flowers have a more complex morphology. Zygomorphy (or when a flower can only be divided down the middle to make two equal mirror images) is thought to restrict the types of pollinators that can take nectar and pollen from the flower. Flies, for instance, won't often visit zygomorphic flowers. Bees, on the other hand, adore them.

"Although geography may play a primary role, a close second is the flower morphology of the plants in a particular family," says Jana Vamosi. "So essentially all camps may claim partial victory because morphological traits should be considered in the context of geographical area."

Leanne Yohemas | EurekAlert!
Further information:
http://www.ucalgary.ca

More articles from Life Sciences:

nachricht Barium ruthenate: A high-yield, easy-to-handle perovskite catalyst for the oxidation of sulfides
16.07.2018 | Tokyo Institute of Technology

nachricht The secret sulfate code that lets the bad Tau in
16.07.2018 | American Society for Biochemistry and Molecular Biology

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Subaru Telescope helps pinpoint origin of ultra-high energy neutrino

16.07.2018 | Physics and Astronomy

Barium ruthenate: A high-yield, easy-to-handle perovskite catalyst for the oxidation of sulfides

16.07.2018 | Life Sciences

New research calculates capacity of North American forests to sequester carbon

16.07.2018 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>