Clustering of diffusing organisms. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2002

Clustering of diffusing organisms.

Résumé

Recently, a "Brownian bugs" model has been proposed as a possible explanation for the clustering of organisms such as planktons [W.R. Young, A.J. Roberts, and G. Stuhne, Nature (London) 412, 328 (2001)]. In this model, diffusing organisms die and give birth with equal probabilities and are independent of each other. The clustering phenomenon is due to the discreteness of birth and death events and cannot be explained in the framework of the continuous model of population dynamics. We show by exact calculation that at dimensions smaller than or equal to 2, this simple mechanism is enough to provoke aggregations of the organisms. At dimensions higher than 2, the clustering phenomenon disappears, but reproductive fluctuations can still be large compared to diffusive ones.
Fichier principal
Vignette du fichier
brown_cluster_hal.pdf (214.43 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01085049 , version 1 (17-12-2014)

Identifiants

  • HAL Id : hal-01085049 , version 1
  • PUBMED : 12513541

Citer

Bahram Houchmandzadeh. Clustering of diffusing organisms.. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2002, pp.052902. ⟨hal-01085049⟩

Collections

UGA CNRS LIPHY
77 Consultations
172 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More