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.


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


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.
Clare mansion, and the waves of life settled back to their usual flow, where that little bark had gone down.
The use of smoke by various peoples and cultures through time revives genetic memories of legends and traditions, prompting a journey to different worlds; worlds that beget dreams, the waves of life, love and passion, the touching of souls and thoughts, and the contemplation of fate in a bare, minimalistic way," he said.
The last time my sons rode the waves of life it involved a pedalo, cost 10 euros for half an hour and I pulled a hamstring.
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.
The loss of life in the cell, the black holes that appear in the nervous system, that can be partially restored by deep brain stimulation with blue light, was the catalyst for James Bellaney's seemingly abstract canvas of a painterly brain, the surface activiated or deadened by wavelengths of colour in close association, a momentarily static map of waves of life and death.
What on earth has gone wrong with this country that families can no longer sail the bumpy waves of life without having to call in police to settle their disputes?
They told me that like stones, it is necessary to be still and go with the waves of life as we continue to struggle.
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.
God has given to the believer the promise of His strength to resist the winds and waves of life.