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Symposium Introduction

Populations, communities, ecosystems. The principles of their organization.

Population is a group of individuals of one species with the ability to freely interbreed and indefinitely maintain its existence in particular locality. population - it is a unity which determined by the commonality of the territory occupied by individuals (or water), as well as their common origin, the similarity of the structure and behavior. For example: all individuals, living in a small lake, or all the trees of one species in the forest.

The closest in meaning to the term "population" is the concept "Tribe". Consequently, the population consists of identical organisms, together living in certain areas and linked by various relationships, which provide them a sustainable existence in this environment.

The word "population" comes from the Latin "populyus" - people, people. Environmental population, thus, can be defined as the population of one species in a particular area.

Members of one population have on each other no less interaction than physical environmental factors or other kinds of organisms living together. In populations occur in varying degrees, all forms of communication characteristic for interspecies relations, but most pronounced mutualistic (mutually helpful), and competitive. In all cases the populations have laws allowing such use of limited resources environment to to the abandonment of offspring. This is achieved mainly through quantitative change in the population. Populations of many species have properties that enable them to control their numbers.

 

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