The phrase "demographic collapse" is correct and can be used in written English.
It refers to a sudden decrease in population or fertility rates within a specific demographic group. Example: The demographic collapse in Japan, where the aging population is not being replaced by enough younger generations, has led to concerns about the sustainability of their economy.
That is a recipe for demographic collapse.
Conservatives say they want to avoid a European-style demographic collapse.
The challenge is a "slow-motion demographic collapse," according to the Violence Policy Center, a gun-safety advocacy group.
Bayesian methods revealed that populations from all three species underwent a major demographic collapse of around two orders of magnitude.
The data furthermore revealed signals of a demographic collapse of about two orders of magnitude in the two exemplary sites.
Russia edges toward demographic collapse, even as its energy sector faces challenges from natural gas discoveries elsewhere.
Categorical socio-demographics were collapsed to eliminate empty cells.
He blames drink for the demographic and psychological collapse of the Russian nation, for the empty and rotting settlements that scatter the country, the catastrophic rates of accidental death, and the dismal record of life expectancy and infant mortality.
Ten years after communism started to collapse, a demographic disaster with male life-expectancy "stabilising" at around 58 years—has befallen a truncated, humiliated nation.
George Weigel, a Catholic conservative and loving biographer of Pope John Paul II, deftly links Europe's "demographic suicide" with its collapse of faith in his "The Cube and the Cathedral: Europe, America, and Politics without God", a theo-conservative bible on what has gone wrong with Europe.The third complaint is that Muslims are filling Europe's demographic and spiritual void.
The subway system is a little like Social Security: ingenious, necessary, expensive, historically robust, yet, by virtue of demographics, shadowed by future collapse.
