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A study conducted between 2014 and 2018 reveals that a large proportion of the deltaic populations of Volta delta in Africa, the Ganges Brahmaputra Meghna delta in Bangladesh and India, and Mahanadi delta in India cited economic reasons as a cause of their migration and only 2.8% cited environment reasons. One third of migrant households ...
Human migration is the movement of people from one place to another, [1] with intentions of settling, permanently or temporarily, at a new location (geographic region). The movement often occurs over long distances and from one country to another (external migration), but internal migration (within a single country) is the dominant form of human migration globally.
Migration encompasses four related concepts: persistent straight movement; relocation of an individual on a greater scale (in both space and time) than its normal daily activities; seasonal to-and-fro movement of a population between two areas; and movement leading to the redistribution of individuals within a population. [5]
It is the most common form of migration in ecology. [5] It is found in all major animal groups, including birds, [6] mammals, [7] fish, [8] [9] reptiles, [10] amphibians, insects, [11] and crustaceans. [12] [13] The cause of migration may be local climate, local availability of food, the season of the year or for mating. [5]
Between the Crimean War of 1853–56 and World War I, at least 2.5 million Muslims arrived in the Ottoman Empire as refugees, primarily from Russia and the Balkans. [14] The Balkan Wars of 1912–1913 caused 800,000 people to leave their homes. [15] Various groups of people were officially designated refugees beginning in World War I.
Population exchange is the transfer of two populations in opposite directions at about the same time. In theory at least, the exchange is non-forcible, but the reality of the effects of these exchanges has always been unequal, and at least one half of the so-called "exchange" has usually been forced by the stronger or richer participant.
Migration of butterflies and moths is particularly well known. The Bogong moth is a native insect of Australia that is known to migrate to cooler climates. The Madagascan sunset moth ( Chrysiridia rhipheus ) has migrations of up to thousands of individuals, occurring between the eastern and western ranges of their host plant, when they become ...
Displacement (linguistics), the ability of humans (and possibly some animals) to communicate ideas that are remote in time and/or space; Forced displacement, by persecution or violence; Displacement (psychology), a sub-conscious defense mechanism; Displacement (parapsychology), a statistical or qualitative correspondence between targets and ...