"Population abundance" refers to a large number of individuals in a particular group or species that live in a specific area or ecosystem. It suggests a significant presence of a certain population. Full definition
Developing a lucrative green crab fishery may be a viable way to control population abundance and derive value from this invasive species. (manomet.org)
Using data on population abundance, trends, and threats, the team of scientists determined that the monarch butterfly species as a whole is apparently secure, but the subspecies occurring in North America is vulnerable to extinction. (xerces.org)
But, in contrast with the El Niño Southern Oscillation index [12], the NAO and PDO operate on decadal scales, causing extended periods of high or low population abundance [5], [7]. (journals.plos.org)