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A fertility rate of 2.1 children is considered stable excluding migration flows.
Nations with aging populations and declining fertility rates, such as Japan, Germany, Italy, and South Korea, would likely be concerned about declining population. These countries may face issues related to workforce shortages, economic stagnation, rising dependency ratios, and strains on social security and healthcare systems.
Stable reflect variation.We can use terms of being:Very stable, less stable, not so stable.At the same time in same but inverse order:A little variation, more variation, most variation.A stable population would be considered a population that does not vary in numbers that much. Fluctuation is considered normal. Stability of a population is its stability over time as in several generations.An unstable population would go drastically up or down within few generations.We do not count a population as stable the same way as we would categorise an element to be stable. A population is allowed to vary slightly over time, where as an element that vary slightly over the same time might be called unstable.Other factors are to be considered:If a population is very high as in numbers of older not propagating specimens then it could be considered an unstable population because it would be unable to sustain its numbers and diminish over time.If a population lives under conditions unsuitable for sustaining quality of life then it would affect its stability.More factors will apply.Stability is statistics. We can make statistics to suit our present needs even if the numbers does not lie.
The overall growth rate of the general population is stagnant .
In a country with zero population growth, you would expect to find a stable population size where the number of births equals the number of deaths. This would mean the population is not increasing or decreasing over time.
In a stable population, where births and deaths are roughly balanced, immigration and emigration rates would also be roughly balanced. This is because the population is neither growing nor declining, so the number of people entering the population through immigration would be offset by the number leaving through emigration.
That would be called a "stable" or "static" population - essentially unchanging.
There may be many different answers for this question, but the most obvious would seem to be that population increases when birth rates are high. Similarly, in countries where fertility rates are high then population is very likely to increase.
a stable equilibrium phase
A stable equilibrium phase
if all the decomposers were removed the fertility would wouldnt grow :)
if all the decomposers were removed the fertility would wouldnt grow :)