Sentence examples for migration of alien from inspiring English sources

The remaining native fish populations persist only in undisturbed headwater tributaries, often above in-stream physical barriers that prevent upstream migration of alien invasive fishes.

For example, the building of weirs to prevent upstream migration of alien species has been considered to be one of the best conservation strategies to secure the remaining populations of threatened fish species [ 51, 52].

"The continuing and threatened mass migration of aliens with no basis for admission into the United States through our southern border has precipitated a crisis and undermines the integrity of our borders," Mr. Trump wrote in the proclamation.

The continuing and threatened mass migration of aliens with no basis for admission into the United States through our southern border has precipitated a crisis and undermines the integrity of our borders.

made previous to the importation or migration of such alien or aliens, foreigner or foreigners, to perform labor or service of any kind in the United States". 143 U.S., at 458, 12 S.Ct., at 511.

"any person, company, partnership, or corporation, in any manner whatsoever, to prepay the transportation, or in any way assist or encourage the importation or migration of any alien or aliens, any foreigner or foreigners, into the United States.

I wasn't a "RESIDENT ALIEN" at all but another kind of alien — in common parlance, an "illegal alien". The label "alien" is nothing but alienating.

We also compare the predictors of alien versus invasive species richness, and alien plant versus alien animal species richness.

Illegal migration and alien smuggling continue to threaten American interests and institutions.

Regarding alien species, the H/O provided 85% of alien species, the RA only 67%.

GETTING rid of alien invaders is hard.