Sentence examples for migration and population from inspiring English sources

But increasingly, illegal migration and population pressures too are in play.

Valdiosera, C. E. et al. Surprising migration and population size dynamics in ancient Iberian brown bears (Ursus arctos).

By simulating wide ranging rates of migration and population decline, we also determine how the importance of these forces changes depending on their relative magnitude.

These cities' long histories provide invaluable lessons in migration and population growth that, in the absence of thoughtfully designed urban development, have resulted in decay at the centers around which public life revolves.

His team's analyses have proved interbreeding between archaic and modern humans and revealed previously unknown information about migration and population turnovers, and he is working to make ancient DNA technology accessible to all scholars.

If transversal analysis is not often used today to study the decline of fertility, it is almost inevitable to study large cities (due to heavy migration and population size), and all the more essential in the case of Paris, as the personal archives have disappeared in 1871.

The site tracks bird migration and populations and makes that data publicly available to birdwatchers, scientists and everyone else.

The long time interval of these studies (1920s 1980s) implies relatively stable parasite populations; however, the effect of greatly increased airplane travel, migration, and population-level antimalarial drug pressure should be explored.

The external benefits of human capital also attract additional workers and cause highly educated metropolitan areas in the U.S. to experience greater in-migration and population growth (Glaeser, Scheinkman and Shleifer 1995; Simon and Nardinelli 2002; Winters 2011).

However, although some in-migration and population mixing may have occurred in the study region, the fact that the population in this area was fairly stable over the last two decades [see Supplemental Material (http://www.ehponline.org/docs/2007/9861/suppl.pdf)] renders a population-mixing hypothesis less persuasive as an explanation for the persistent elevation of childhood leukemia.

Therefore, the dominance of a single Y-chromosome haplotype across large regions possibly reflects involvement of relatively few males in some migrations and population founder events.