Accession Number : AD0779875

Title :   Diffusion-Induced Instability in Model Ecosystems: Another Possible Explanation of Patchiness.

Descriptive Note : Technical rept.,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD CHESAPEAKE BAY INST

Personal Author(s) : Okubo, Akira

Report Date : MAY 1974

Pagination or Media Count : 23

Abstract : As a diffusion process in an ecosystem tends to give rise to a uniform density of population in space, it may be expected that diffusion plays a general role of increasing the stability in a system of mixed populations and resources. However, diffusion may also induce an instability to a system which is basically stable without diffusion. Thus a system of two interacting and diffusing populations both being co-existent in a spatially uniform distribution, hence with no patterns, may exhibit an interaction-diffusion instability. The instability results in a form of biological waves in space and time, thus leading to a 'patchiness.' (Author)

Descriptors :   *AQUATIC ORGANISMS, MATHEMATICAL MODELS, SIMULATION, ECOLOGY, NAVAL RESEARCH, STABILITY, INSTABILITY, DIFFUSION, POPULATION, DISTRIBUTION.

Subject Categories : Biology
      Ecology

Distribution Statement : APPROVED FOR PUBLIC RELEASE