The phrase "levels of population" is correct and usable in written English.
It can be used to refer to the number of people living in an area at a particular period of time. For example, "The levels of population in the region rose sharply over the summer months."
Derex, M., Perreault, C. & Boyd, R. Divide and conquer: intermediate levels of population fragmentation maximize cultural accumulation.
(Much higher levels of population were reached in Greco-Roman times).
Fire frequency and human population density were positively correlated during an early period (1680 1880) with low levels of population, but negatively correlated during a later period (1881 1910) with high levels of population.
Therefore, levels of population differentiation among the study stands are low and are not correlated to distance.
In most regions of the world, increased population density initially leads to an increase in burned area but that relationship reverses at higher levels of population density.
"Differing levels of population growth across different cities and regions are often a reflection of the economic strength of the location, with areas where the economy is performing strongest often experiencing most population growth," the ONS said.
Via simulation, we show that empirical levels of population structure observed across modern China can cause spurious associations in GWAS if not properly handled.
It's pretty much the same story when direct connections are made between the continuing assault on biodiversity in countries all around the world, and unsustainably high levels of population growth.
We defined a tract as similar to the county for a given racial group if its absolute percentage difference is less than 20% (or 40% for black people, to control for generally lower levels of population in that group).
The principal consequences of these disorders are high levels of population ill-health and disability and a heavy societal economic burden [1, 2, 4].
The town experienced its greatest levels of population growth between 1964 and 1969 with an average inward migration level of 1,900 persons per annum.
