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The Theory of Island Biogeography has its roots in Wilson's work on the ants of Melanesia.MacArthur synthesized Wilson's ideas about competition, colonization and equilibrium into a simple graphical representation of immigration and extinction curves, from which one can determine the equilibrial species number on an island. [3]
Research with Filipino Americans has demonstrated that first-generation immigrants had lower levels of depressive symptoms than subsequent, US-born generations. [19] First-generation Mexican immigrants to the United States were found to have lower incidences of mood disorders and substance use than their bicultural or subsequent generation counterparts.
On the other hand, if immigration and colonization rates are low relative to extinction rates, meaning more individuals of a population die comparing to the newly arrived ones, the rescue effect is small. It can also be concluded that the insular isolation should be inversely related to the turnover rate of the population inhabiting the island.
JPMorgan’s head of research says immigration is undeniably a ‘good thing’ for the economy, as the bank forecasts even higher US GDP growth this year Paolo Confino March 22, 2024 at 11:04 AM
Research also shows that migration to Latin America during the Age of Mass Migration had a positive impact on long-run economic development. [76] A 2016 paper by University of Southern Denmark and University of Copenhagen economists found that the 1924 immigration restrictions enacted in the United States impaired the economy. [77] [78]
Some research suggests that immigration can offset some of the adverse effects of automation on native labor outcomes in the United States. [28] [29] By increasing overall demand, immigrants could push natives out of low-skilled manual labor into better-paying occupations.
The Migration Research Unit is based at the London School of Economics. [94] The Global Migration Centre is based at The University of Geneva's Graduate Institute. [95] The Asian Research Center for Migration is based at Chulalongkorn University in Thailand. [96] The Refugee and Migratory Movements Research Unit is based at University of Dhaka ...
When discussing population dynamics, behavioral ecology, and cell biology, recruitment refers to several different biological processes. In population dynamics, recruitment is the process by which new individuals are added to a population, whether by birth and maturation or by immigration. [1]