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Biological ponds английский

ponds used for biological treatment of sewage. Used independently – for treatment by micro-organisms and algae of sinks, saturated with easily oxidizing organic matters, or as the intermediate objects between the industrial treatment facilities and the natural water receivers. They operate by a principle of self-treating of water, accrue sludgy mass which can be used in agriculture as fertilizer or as a raw material for its production.

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Biological species английский

usually under B.s. or simply species it is understood a population, or variety of populations, of species which are able to crossbreed forming a fecund produce (without reduction of fertility) possessing a number of common morphophisiological features and detached from other alike groups of species with almost entire absence of the hybrid forms. B.s. is a basic structural unit in a system of living organisms, a qualitative stage of evolution. In context of Obliganto asexual (agamic), parthenogenetic and self-impregnating organisms under B.s. there are understood groups of alike clones (produces of one organism) or lines possessing a genetic and morpho-physiological analogy, occupying a certain areal and having a similar type of interrelations with habitat.

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Biological diversity английский

a number of various types of biological plants or phenomena and frequency of their meeting on a fixed portion of space and time generally reflecting a complicated form of a living matter, its capacity for self-regulation of functions and resources for its comprehensive usage. B.d. includes all species of animals, plants, fungi and micro-organisms, ecosystems and processes flowing proceeding in them. Three levels of B.d. are outlined: genetic diversity, diversity of species and diversity of ecosystems. Genetic D. reflects the genetic information contained in living matter of the Earth, in a concrete territory, D. of species reflects the amount of species and an opportunity to meet them in a concrete territory. D. of ecosystems reflects the amount of various types of habitats, communities and ecological processes. B.d. is a special case of a universal phenomenon of a diversity of nature.

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Biological standards английский

A maximum tolerance level of lead in human bloodstream can be considered as an example of biological standard. The advantage of a biological standard's application as a controlling tool is a fact that it determines a comprehensive influence of all sources on the researched object, i.e. an object being under the protection. Its disadvantage is a fact that it allows to detect an excess of a maximum tolerance level only when a pollutant has already penetrated into organism and, possibly, in excessive amounts.

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