The phrase "dwindling population" refers to a situation where the number of individuals in a particular group or community is progressively getting smaller or decreasing over time. Full definition
In an effort to boost dwindling populations, some towns have come up with an inventive idea: Move here, and we'll help pay your student loans. (business.time.com)
This can result in harm to the organism and dwindling populations of sensitive species. (nrdc.org)
«Firstly, we are following a non-destructive strategy to mass propagate individuals from a variety of genotypes to allow for potential repopulation of dwindling populations in the Duthie Reserve and elsewhere,» Dr Hills explains. (sciencedaily.com)