- Biotic potential
Biotic potential is the maximum
reproductivecapacity of a populationunder optimum environmental conditions. Full expression of the biotic potential of an organism is restricted by environmental resistance, any condition that inhibits the increase in number of the population. It is generally only reached when environmental conditions are very favorable. A species reaching its biotic potential would exhibit exponential population growthand be said to have a high fertility, that is, how many offspring are produced per mother.
Biotic Potential is a fundamental species characteristic, defined by Chapman (1925) as "the inherent power of organisms to reproduce and survive" [Chapman, R. N., 1925. Animal Ecology with Special Reference to Insects. Burgess Brook Inc.,Minneapolis. 370 pp. See pp.158-161.] . In 1931, Chapman redescribed it as: "It is a sort of algebraic sum of the number of young produced at each reproduction, number of reproductions over a period of time, sex ratio of the species, and their general ability to survive under given physical conditions." [Chapman, R. N. (1931) Animal Ecology. McGraw-Hill, New York]
Chapman relates to a "vital index": :Vital Index = (number of births/number of deaths)*100
Biotic potential is the highest possible vital index of a species; therefore, when the species has its highest birthrate and lowest mortality rate.
ignificance of Biotic Potential
If the potential value of population increase can be determined, the impact of the environment upon the population also can be determined.
*Compute the biotic potential (potential increase) and subtract the actual or observed value of decrease; this difference represents how effective the environment is in preventing the species from attaining its full potential.
*Chapman called difference between potential and actual value the environmental resistance.
Components of Biotic Potential
*Reproductive potential - potential
natality: It is the upper limit to biotic potential (in the absence of mortality.)
*Survival potential: Because reproductive potential does not account for the number of gametes surviving, survival potential is a necessary component of biotic potential; it is the
reciprocalof mortality(in the absence of mortality biotic potential = reproductive potential).
Chapman identified two components:
* nutritive potential - the ability to acquire and utilize food for growth and energy.
* protective potential - potential ability of the organism to protect itself against the dynamic forces of the environment.
** assuring successful fertilization (mating).
** care of young.
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biotic potential — biotinis potencialas statusas T sritis ekologija ir aplinkotyra apibrėžtis Gyvųjų organizmų geba išlikti biotope arba rūšies geba įveikti aplinkos pasipriešinimą (fizinių ir biologinių veiksnių sukeltus trukdžius). atitikmenys: angl. biotic… … Ekologijos terminų aiškinamasis žodynas
biotic potential — the capacity of a population of organisms to increase in numbers under optimum environmental conditions. [1930 35] * * * ▪ biology the maximum reproductive capacity of an organism under optimum environmental conditions. It is often… … Universalium
biotic potential — noun 1. : the inherent capacity of an organism or species to reproduce and survive, being usually expressed in terms of numbers that could be produced under optimum conditions and in the absence of environmental resistance 2. : carrying capacity… … Useful english dictionary
biotic potential — 1. The reproductive potential of a species. 2. An estimate of the rate of increase of a species in the absence of predators, parasites or other inhibiting factors … Dictionary of invertebrate zoology
biotic potential — noun Date: 1928 the inherent capacity of an organism or species to reproduce and survive … New Collegiate Dictionary
biotic potential — the maximum rate that a population can increase when there are no limits on rate of growth … Dictionary of ichthyology
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Biotic — means relating to, produced by, or caused by living organisms. The term biotic may also refer to: *Life, the condition of living organisms, *Biology, the study of life *Biotic factor in ecology, *Biotic material, which is derived from living… … Wikipedia
potential — 1. Capable of doing or being, although not yet doing or being; possible, but not actual. 2. A state of tension in an electric source enabling it to do work under suitable conditions; in relation to electricity, p. is analogous to the temperature… … Medical dictionary
reproductive potential — reproductive potential. = biotic potential (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.