Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Local interventions have little effect on metapopulation stability

21.02.2007
Stabilizing fluctuations in the number of individuals in fragmented populations of threatened species is an important concern in conservation biology.

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

Andrew Hyde | alfa
Further information:
http://www.plosone.org

Further reports about: Dynamics Joshi Stability metapopulation perturbation

More articles from Life Sciences:

nachricht Seeing on the Quick: New Insights into Active Vision in the Brain
15.08.2018 | Eberhard Karls Universität Tübingen

nachricht New Approach to Treating Chronic Itch
15.08.2018 | Universität Zürich

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

Im Focus: Lining up surprising behaviors of superconductor with one of the world's strongest magnets

Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur

What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

2018 Work Research Conference

25.07.2018 | Event News

 
Latest News

Unraveling the nature of 'whistlers' from space in the lab

15.08.2018 | Physics and Astronomy

Diving robots find Antarctic winter seas exhale surprising amounts of carbon dioxide

15.08.2018 | Earth Sciences

Early opaque universe linked to galaxy scarcity

15.08.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>