Selective Advantage of Diffusing Faster

Selective advantage of diffusing faster.

We study a stochastic spatial model of biological competition in which two species have the same birth and death rates, but different diffusion constants. In the absence of this difference, the model can be considered as an off-lattice version of the voter model and presents similar coarsening properties. We show that even a relative difference in diffusivity on the order of a few percent may l...

ar X iv : 1 30 7 . 82 52 v 2 [ q - bi o . PE ] 1 6 M ay 2 01 4 Selective advantage of diffusing faster

We study a stochastic spatial model of biological competition in which two species have the same birth and death rates, but different diffusion constants. In the absence of this difference, the model can be considered as an off-lattice version of the Voter model and presents similar coarsening properties. We show that even a relative difference in diffusivity on the order of a few percent may l...

The selective advantage of microbial fratricide.

S treptococcus pneumoniae, a leading cause of serious infections, including pneumonia, infections of the middle ear, and meningitis (recently reviewed in ref. 1), is an organism of great public health concern. Antibiotic resistance among S. pneumoniae strains is rapidly increasing, complicating treatment (2). S. pneumoniae, previously known as Diplococcus pneumoniae or pneumococcus, played a ce...

The Selective Advantage of Sex-Ratio Homeostasis

Selective advantage of the sickle-cell trait.

tories; (ii) fights limited to two males; (iii) incessant barking by established territorial males; (iv) the use of physical force for displacement of an opponent; (v) the stereotyped boundary ceremony; (vi) the intrusion of smaller males into the resident male's territory so long as they maintain silence and remain visually inconspicuous; and (vii) interference by a dominant bull in "noisy squ...