The phrase "alien communities" is correct and usable in written English.
It can be used to refer to groups of beings or entities that are not native to a particular environment, often in the context of science fiction or discussions about extraterrestrial life.
Example: "The researchers discovered several alien communities thriving in the depths of the ocean, each with its own unique ecosystem."
Alternatives: "extraterrestrial societies" or "foreign populations".
Its alien communities were small (mostly fewer than 1,000 people) and localized, and some were long-established.
Here's what Roy Beck, the executive director of NumbersUSA, the hard-core anti-immigration organization, said in an e-mail after the Bush administration announced a border-and-workplace crackdown: "The illegal alien communities — and the outlaw businesses that hire them — are in a panic this weekend.
The proposed activities differentiate between a) areas that need abrupt and complete clearing of alien vegetation in native grassland or shrubland, and b) areas where gradual removal of alien communities is preferred, e.g. in 'novel forests' or riparian tree communities.
Thoughrticlessriginally appeared on VICE US.
The Moriscos remained an alien community, suspicious of and suspect to the "old" Christians.
"Navarro has close ties to CASA of Maryland and the illegal alien community.
It's difficult to immerse yourself in another culture, and in a different language, when to a European this is a very alien community.
In March 1997 Applewhite declared that the appearance of the Comet Hale-Bopp signaled the arrival of a spaceship sent to gather up the "mature plants" before the impending "spading over" of the garden (i.e., end of the world), and the remaining 39 members of the group committed suicide in order to join the alien community in outer space.
This general process facilitates the conversion of an alien community to a natural forest through selective removal of the invading nurse trees, when the nurse trees have relatively small stem diameters.
Everson et al. (2016) developed a decision-tree to guide the active rehabilitation of invasive alien plant communities (Fig. 6).
Planted and naturalizing stands of shade-intolerant introduced tree species of pines, eucalypts, acacias and other species facilitate the establishment of shade-tolerant native forest species, with the development of alien plant communities (Knight et al. 1987; Geldenhuys 1992, 1996a, 1997; Parrotta 1995; Loumeto & Huttel 1997; Parrotta & Turnbull 1997; Geldenhuys & Delvaux 2007).
