population - are individuals belonging to the same species, are capable of crossing freely and have a common gene pool.Species has strength, mortality, fertility, dynamics, areal density.Population structure also includes the ratio of males and females, ages, spatial distribution system.
size range is determined in accordance with the radius of the unit (individual) activity and represents the distance between the point of death and birth most individuals.For example, a lizard that radius of thirty meters, muskrat - about four hundred, a rabbit and a sparrow - three kilometers.In plants the size of the range is set according to the distance that flies pollen.For instance, pine radius activity about one hundred twenty, and maize - about fifteen meters.
area and shape of the area in each case determined in accordance with landscape features of the territory.Equally important are intrapopulation distinctive features, as well as geographical (territorial) communication of individuals.
most often isolated populations of species such as geographical, ecological, local.Environmental
call this set of individuals that live in the same system.The boundaries coincide with the boundaries of the ecosystem itself, defined by vegetation, plant community.
local population - a set of local populations of certain species.Individuals live on different ecosystems specific locality.So, the local population of house sparrow - a set of populations of individuals from communities located at a distance of less than three kilometers apart.
Geographic is the set of individuals occupying territory with homogeneous geographically conditions.From Kamchatka to Brest, for example, found twenty-nine red squirrel populations.Geographic populations - is a territorial race subspecies.Individuals in this exhibit phenotypic similarity.
Population (population) - is, first of all, the basic unit of the process of evolution.At the same time it is also a main unit of a certain kind of space.Thus, the population can be described as a collection of individuals, not only occupy a certain territory (space), but also capable of playback for a long time.The integrity of the population in terms of evolution associated mainly with panmixia (free crossing), which in one degree or another within the same set of species is higher than between the neighboring nations.At the same time, despite the integrity population heterogeneous in genetic traits.Main characteristics of the species are fixed genetically.
There is a classification of the population, and from a medical point of view.
example, emit a closed set of individuals.In this case, one population is isolated from the others by gender.
There's also an ideal set of individuals.In this case, consider a hypothetical panmictic (capable of interbreeding) population, having a large number of persisting in generations.This set of species not susceptible to the effects of the mutation pressure, external factors of natural selection.The concept of the ideal population is used in the modeling process of evolution.
individuals of one species can be genetically identical.In this case, we are talking about isogenic population.
The set can be open.In this case, migratory birds introduce new genes into it.
microbial population is the set of cells of a particular strain.
