The phrase "a decrease in population" is correct and usable in written English.
It can be used when discussing demographic changes, trends, or statistics related to the number of people living in a specific area.
Example: "The recent studies indicate a significant decrease in population in rural areas over the past decade."
Alternatives: "a decline in population" or "a reduction in population."
Because of a decrease in population upstate, New York loses two Congressional seats this year.
Any number below 1.0 indicates a decrease in population, while any number above indicates an increase.
Such a decrease in population usually leads to a reduction of the urban area.
All eight islands showed a decrease in population, with four showing a dramatic decrease of up to 50 per cent.
Among these eight were the only two UK cities to experience a decrease in population between 2002 and 2012: Burnley's population decreased by approximately 1,000 while further north, Sunderland lost over 7,000.
The state, which had been slowly losing population for decades, experienced a decrease in population of about one-tenth in the last decade of the 20th century.
The population census in 2005 recorded a decrease in total population for the first time since the Second World War.
In both cell lines, following release from serum starvation, an increase of cell population in S phase and a decrease in cell population in G1 phase (data not shown) were observed, indicating that the cells entered a cell division cycle.
Similarly, butterfly populations in Finland subject to loss of habitat have shown a decrease in effective population size and an increase in extinction risk (Saccheri et al. 1998).
Therefore, a decrease in the population more prone to meningococcal meningitis was observed together with an increase in the population more susceptible to having pneumococcal and listerial meningitis.
This is due to a decrease in the population of surface VOx species.
