Local interventions have little effect on metapopulation stability

Theoretical studies indicate that localized perturbations, such as adding a constant number of individuals every generation, can stabilize such fluctuations in networks of local populations that are connected to each other by migration (metapopulations). If they work, such perturbations could prove to be a useful tool for managing fragmented and unstable populations.

Sutirth Dey and Amitabh Joshi of Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India used laboratory metapopulations of fruitflies in the first experimental test of whether a constant localized perturbation can stabilize a real biological metapopulation.

Dey and Joshi showed that constant addition of fruitflies every generation to a particular population in the network does stabilize that population locally, but does not have any detectable effect on the dynamics and stability of the fruitfly metapopulation as a whole. Computer simulations of the experimental system using a simple and widely applicable model of population dynamics were able to recover most of the experimental results, indicating that their results are likely to be generalizable to other species. The simulations also indicated that the basic finding of no detectable effect of constant local perturbation on metapopulation dynamics and stability was robust across a much wider range of ecological scenarios than the precise conditions of their fruitfly experiment.

The study of Dey and Joshi sounds a cautionary note for ecologists and conservation biologists trying to stabilize fragmented populations in nature because it indicates that, contrary to theoretical predictions, localized perturbations are unlikely to affect the dynamics of real metapopulations.

This study will be published on February 21, 2007 in PLoS ONE, the international, peer-reviewed, open-access, online publication from the Public Library of Science (PLoS).

Citation: Dey S, Joshi A (2007) Local Perturbations Do Not Affect Stability of Laboratory Fruitfly Metapopulations. PLoS ONE 2(2): e233. doi:10.1371/journal.pone.0000233

Media Contact

Andrew Hyde alfa

Weitere Informationen:

http://www.plosone.org

Alle Nachrichten aus der Kategorie: Life Sciences

Articles and reports from the Life Sciences area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Zurück zur Startseite

Kommentare (0)

Schreib Kommentar

Neueste Beiträge

Rotation of a molecule as an “internal clock”

Using a new method, physicists at the Heidelberg Max Planck Institute for Nuclear Physics have investigated the ultrafast fragmentation of hydrogen molecules in intense laser fields in detail. They used…

3D printing the first ever biomimetic tongue surface

Scientists have created synthetic soft surfaces with tongue-like textures for the first time using 3D printing, opening new possibilities for testing oral processing properties of food, nutritional technologies, pharmaceutics and…

How to figure out what you don’t know

Increasingly, biologists are turning to computational modeling to make sense of complex systems. In neuroscience, researchers are adapting the kinds of algorithms used to forecast the weather or filter spam…

By continuing to use the site, you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close