The phrase "alien population" is correct and usable in written English.
It can be used in contexts discussing non-native species, extraterrestrial beings, or groups of people from different countries or cultures.
Example: "The study focused on the impact of the alien population on the local ecosystem."
Alternatives: "foreign population" or "non-native population".
"Teenagers are not some alien population," she said.
Finally, we show that the corridor can become a refuge for the alien population.
Rated No. 1 as the must-invade city by the universe's entire monomaniacal alien population.
Historically Democrats have focused on unskilled workers, mostly Mexicans, who also comprise the bulk of the illegal alien population.
As District 9's credits roll, we learn that South Africa's encamped alien population has come to be numbered in millions.
The pool of potential invaders consists of those species, which are capable of being introduced into the focal region and establish an alien population.
This was true along agricultural frontiers – in Lower Burma, southern Russia, northern Japan – where settlers tied more or less closely to imperial culture overawed alien populations.
Many of these taxa have been introduced intentionally as pets, particularly in recent times13, increasing the likelihood of the establishment of alien populations.
Introducing other mechanisms relevant for the establishment of alien populations, such as an Allee effect, delayed the process of invasion, but revealed qualitatively similar results (dashed lines in Fig. 5c).
Road building could hasten the erosion of fragile slopes; construction and maintenance of the dam could introduce alien populations and communal tensions; a more monetized economy could undermine tribal values.
On Wednesday, the Hungarian parliament also passed a constitutional amendment stating that "alien populations" cannot be settled in Hungary – a direct riposte to EU-mandated quotas of asylum seekers for each of its member states, which Hungary has steadfastly challenged.
