The phrase "and when the population" is correct and usable in written English.
It can be used to introduce a condition or situation related to the population in a broader context, often in discussions about demographics or societal changes.
Example: "The study will analyze the effects of climate change on urban areas, and when the population reaches a certain threshold, we expect to see significant impacts."
Alternatives: "and as the population" or "and once the population".
America itself has only one precedent for such a political lineage -- the Adamses -- but that was at the dawn of the Republic, when a tiny clique of landed white males held power, and when the population was a fraction of what it is today.
And when the population dwindled — as after the First Crusade, which like a neutron bomb eliminated the infidels but preserved the holy places — you could always dash across the Jordan, like Baldwin the crusader king in 1115, and bring back "poverty-stricken Syrian and Armenian Christians, whom he invited to settle in Jerusalem, ancestors of today's Palestinian Christians".
When the population is growing, more of the dependents are children, and when the population is shrinking, more are older adults, the model indicates.
Apparently, the quadratic (with respect to r) term in (3) causes the method to produce strong overestimates of the life expectancy in cases with strong population growth or decline and when the population stability assumption is violated.
We found that increasing the spatial scale of disturbances (while keeping the overall disturbance rate fixed) can increase population density, but generally only when landscape turnover is slow relative to population dynamics and when the population is somewhat close to its extinction threshold.
Historically, this Census data is critical in allocating the number of Congressional representatives to each state (when a state's population increases, it can mean more representatives in the House of Representatives, and when the population does not grown or shrinks, it can mean fewer).
A critical first step in management and control of alien ampullariids is to ascertain what species are present, their distributions, where they came from, and when the populations became established.
Thus, it is expected that G LA will perform worse than G ROH in a population with a large N e and when the training population consists of a mixture of different breeds.
Conventional wisdom about Japan was wrong and when the Japanese population started to age, birth rates dropped and the economy slowed.
Farnesol is excreted during cell growth, and when the cell population is high, the synthesis of farnesol increases and inhibits the formation of hyphae [ 17].
And when the two populations meet, the results aren't always pretty.
