"impoverishment by" is a correct and usable phrase in written English.
It is typically used to describe the process or cause of becoming poor or impoverished. Here is an example sentence: "Due to years of economic downturn, the country experienced a drastic impoverishment by inflation and high unemployment rates."
In spite of their high social rank, a growing number of samurai families suffered impoverishment by the end of the Tokugawa period.
Because the World Bank has proposed elimination of medical impoverishment by 2030, the effect of surgical conditions on financial catastrophe should be quantified so that any financial risk protection mechanisms can appropriately incorporate surgery.
The schemes aim to prevent impoverishment by pooling funds raised from government and participants and reimbursing a proportion of health care costs[ 2, 3].
The effect of reduced impoverishment by the HMSA is not as obvious as that of the risk pool, so there is a tendency for more and more counties to choose risk pools at the present.
For centuries, scholars have debated whether the Viking colonies were wiped out by marauding native peoples, by plagues from Europe, by inbreeding, by economic impoverishment wrought by bishops sent from Rome or by abandonment by Scandinavian merchants' refusal to risk their ships in Greenland's increasingly iceberg-infested waters.
It has the effect of removing data that helps highlight why impoverishment caused by welfare reform has become one of the biggest single drivers of people turning to food banks.
The insect plague you describe and the fires are but the early stages of changing the climate out from under the vegetation of the earth, the first increments of the progressive, systematic biotic impoverishment caused by chronic disturbance.
PNG's frenetic and fiercely patriotic social media commentators were preoccupied for days debating "impoverishment" - by whose values was it measured; what account did it take of connections to clan, land, tradition?
Susceptibility is increased through socioeconomic impoverishment caused by the environmental extremes.
With the important exception of low-income areas, urban human populations often inhabit richly cultivated suburban habitats with a relatively high local floral and faunal diversity and/or abundance without awareness of the global impoverishment caused by urbanization.
The goal of the scheme was to protect households against impoverishment caused by medical expenses.
