Document Detail


Chaotic flow: the physics of species coexistence.
MedLine Citation:
PMID:  11087815     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Hydrodynamical phenomena play a keystone role in the population dynamics of passively advected species such as phytoplankton and replicating macromolecules. Recent developments in the field of chaotic advection in hydrodynamical flows encourage us to revisit the population dynamics of species competing for the same resource in an open aquatic system. If this aquatic environment is homogeneous and well-mixed then classical studies predict competitive exclusion of all but the most perfectly adapted species. In fact, this homogeneity is very rare, and the species of the community (at least on an ecological observation time scale) are in nonequilibrium coexistence. We argue that a peculiar small-scale, spatial heterogeneity generated by chaotic advection can lead to coexistence. In open flows this imperfect mixing lets the populations accumulate along fractal filaments, where competition is governed by an "advantage of rarity" principle. The possibility of this generic coexistence sheds light on the enrichment of phytoplankton and the information integration in early macromolecule evolution.
Authors:
G Károlyi; A Péntek; I Scheuring; T Tél; Z Toroczkai
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  97     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2000-12-18     Completed Date:  2001-01-18     Revised Date:  2010-09-14    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  13661-5     Citation Subset:  IM    
Affiliation:
Department of Civil Engineering Mechanics, Technical University of Budapest, Müegyetem rkp. 3, H-1521 Budapest, Hungary.
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MeSH Terms
Descriptor/Qualifier:
Ecology
Population Dynamics
Species Specificity*
Water Microbiology
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