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Wildebeest migrating in the Serengeti. Migration, in ecology, is the large-scale movement of members of a species to a different environment.Migration is a natural behavior and component of the life cycle of many species of mobile organisms, not limited to animals, though animal migration is the best known type.
Climate-induced migration is a highly complex issue which needs to be understood as part of global migration dynamics. Migration typically has multiple causes, and environmental factors are intertwined with other social and economic factors, which themselves can be influenced by environmental changes.
Development-induced displacement and resettlement (DIDR) occurs when people are forced to leave their homes in a development-driven form of forced migration.Historically, it has been associated with the construction of dams for hydroelectric power and irrigation, but it can also result from various development projects such as mining, agriculture, the creation of military installations ...
Counterurbanization, Ruralization or deurbanization is a demographic and social process in which people move from urban areas to rural areas.It, as suburbanization, is inversely related to urbanization, and first occurs as a reaction to inner-city deprivation. [1]
The gravity model of migration is a model in urban geography derived from Newton's law of gravity, and used to predict the degree of migration interaction between two places. [1] In 1941, astrophysicist John Q. Stewart [ 2 ] applied Newton's law to the social sciences, establishing a theoretical foundation for the field of social physics.
A detailed inventory of greenhouse gas emissions from upstream oil and gas activities in Canada for the year 2000 estimated that fugitive equipment leaks had a global warming potential equivalent to the release of 17 million metric tonnes of carbon dioxide, or 12 percent of all greenhouse gases emitted by the sector, [9] while another report put fugitive emissions at 5.2% of world greenhouse ...
Cell migration is a central process in the development and maintenance of multicellular organisms. Tissue formation during embryonic development , wound healing and immune responses all require the orchestrated movement of cells in particular directions to specific locations.
Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres to thousands of kilometres.