The speciation phenomenon is the populations in an ecological system. Our basic process used by the evolution to allow populations assumption is the existence of an ancestral population to become distinct species. The speciation in an ecological niche that can express two is the primary cause of the complexity of the phenotypes. In presence of certain environmental ecological network. Sympatric speciation concerns conditions one of the phenotypes has the the rise of a new species from a surviving propensity to separate from the original population ancestral species while both continue to inhabit in the reproduction process. Then new individuals the same ecological niche or geographical region. may give rise to a new species in the In sympatric speciation, reproductive isolation ecosystem realizing a sympatric speciation. Due evolves within a population in an ecological to the finite resources in the niche the populations niche without the aid of geographic barriers. are continuously competing each other’s, and Different models have been proposed for alternative their numerousness fluctuates according to the modes of sympatric speciation. The most changes of the environmental conditions. The effect popular was first put forward by John Maynard of natural selection is introduced in the Smith in 1966 who suggested that in a given model by stochastic perturbations, that decrease population homozygous individuals may, under the reproduction rate of the populations in the particular environmental conditions, have a niche. We show some the dynamical properties greater fitness than those with alleles heterozy-gous of the system and we prove the existence of a for a certain trait, eventually leading to threshold values in the environmental stress in speciation in the population. In this framework order to observe the speciation process. We also we assume an effective description of the speciation discuss some biological implications of the model process based on a dynamical model for the and the validation problem using empirical data.
A dynami cal model for sympatri c speci ati on i n an ecologi cal niche
Venturino E.;
2019-01-01
Abstract
The speciation phenomenon is the populations in an ecological system. Our basic process used by the evolution to allow populations assumption is the existence of an ancestral population to become distinct species. The speciation in an ecological niche that can express two is the primary cause of the complexity of the phenotypes. In presence of certain environmental ecological network. Sympatric speciation concerns conditions one of the phenotypes has the the rise of a new species from a surviving propensity to separate from the original population ancestral species while both continue to inhabit in the reproduction process. Then new individuals the same ecological niche or geographical region. may give rise to a new species in the In sympatric speciation, reproductive isolation ecosystem realizing a sympatric speciation. Due evolves within a population in an ecological to the finite resources in the niche the populations niche without the aid of geographic barriers. are continuously competing each other’s, and Different models have been proposed for alternative their numerousness fluctuates according to the modes of sympatric speciation. The most changes of the environmental conditions. The effect popular was first put forward by John Maynard of natural selection is introduced in the Smith in 1966 who suggested that in a given model by stochastic perturbations, that decrease population homozygous individuals may, under the reproduction rate of the populations in the particular environmental conditions, have a niche. We show some the dynamical properties greater fitness than those with alleles heterozy-gous of the system and we prove the existence of a for a certain trait, eventually leading to threshold values in the environmental stress in speciation in the population. In this framework order to observe the speciation process. We also we assume an effective description of the speciation discuss some biological implications of the model process based on a dynamical model for the and the validation problem using empirical data.
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