Waves of Life

Waves of Life

 

fluctuations in the number of individuals in a population. The term was introduced by the Russian biologist S. S. Chetverikov in 1915. The fluctuations may be seasonal or nonseasonal, recurring at various intervals. They usually increase in length as the cycle of development of the organisms becomes longer. Waves of life are often accompanied by fluctuations in the range of the population.

Chetverikov treated the evolutionary role of waves of life as a factor capable of altering the direction and intensity of selection, as well as the concentration of genes present in the population. The term was later replaced by the concept of“population waves” (one of four elementary evolutionary factors—the mutation process, population waves, isolation, and natural selection). The main significance of waves of life reduces to the random changes in the concentrations— particularly low concentrations—of various mutations and genotypes present in populations and to a weakening of the pressure of selection by an increase in the number of individuals in the population and its strengthening by a decrease in their number. The term“waves of life” is also taken by some—among them the Soviet geologist B. L. Lichkov—to mean stages in the development of the plant and animal worlds roughly corresponding to the succession of geological cycles.

REFERENCE

Timofeev-Resovskii, N. V.“Mikroevoliutsiia, elementarnye iavleniia, material i faktory mikroevoliutsionnogo protsessa.” Botanicheskii zhurnal, 1958, vol. 43, no. 3.

N. V. TIMOFEEV-RESOVSKII

References in classic literature ?
Such a rule of the two diameters not only guides us toward the sun in the system and the heart in man, but draws lines through the length and breadth of the aggregate of a man's particular daily behaviors and waves of life into his coves and inlets, and where they intersect will be the height or depth of his character.
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The lighthouse mother is a guiding "beacon of light", allowing her youths to safely navigate the world and ride the waves of life. It's close, but not quite applicable to me.
I wrote this letter as a reminder to a distant version of myself wherein I am happy with someone I do not know as of now, a reminder to tell myself to hold on and ride with the waves of life and hope for better days.
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Likewise, migrating gray whales, cerulean warblers, and pronghorn are not objects but waves of life, in the same sense that a wave is not the moving water but the energy coursing through a fluid.