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  2. Migration (ecology) - Wikipedia

    en.wikipedia.org/wiki/Migration_(ecology)

    Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. 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.

  3. Animal migration - Wikipedia

    en.wikipedia.org/wiki/Animal_migration

    Bird migration is controlled primarily by day length, signalled by hormonal changes in the bird's body. [20] On migration, birds navigate using multiple senses. Many birds use a sun compass, requiring them to compensate for the sun's changing position with time of day. [21] Navigation involves the ability to detect magnetic fields.

  4. Bird migration - Wikipedia

    en.wikipedia.org/wiki/Bird_migration

    Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or from south to north. Migration is inherently risky, due to predation and mortality. The Arctic tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds ...

  5. Disjunct distribution - Wikipedia

    en.wikipedia.org/wiki/Disjunct_distribution

    Also called range fragmentation, disjunct distributions may be caused by changes in the environment, such as mountain building and continental drift or rising sea levels; it may also be due to an organism expanding its range into new areas, by such means as rafting, or other animals transporting an organism to a new location (plant seeds consumed by birds and animals can be moved to new ...

  6. Assisted migration - Wikipedia

    en.wikipedia.org/wiki/Assisted_migration

    Assisted migration is a specific type of species introduction. Species introduction is any act of establishing a species in a habitat it does not currently occupy. It often refers to a long-distance relocation, such as the accidental introduction of an invasive species from one continent to another, or the intentional relocation of a species in decline to a habitat where it can persist.

  7. Biological dispersal - Wikipedia

    en.wikipedia.org/wiki/Biological_dispersal

    The patterns of seed dispersal are determined in large part by the specific dispersal mechanism, and this has important implications for the demographic and genetic structure of plant populations, as well as migration patterns and species interactions. There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals.

  8. Migration - Wikipedia

    en.wikipedia.org/wiki/Migration

    Migration (ecology), the large-scale movement of species from one environment to another Animal migration; Bird migration; Plant migration, see Seed dispersal, the movement or transport of seeds away from the parent plant; Gene migration, a process in evolution and population genetics

  9. Reid's paradox of rapid plant migration - Wikipedia

    en.wikipedia.org/wiki/Reid's_paradox_of_rapid...

    [1] [2] Rare long-distance seed dispersal events have been hypothesized to explain these fast migration rates, but the dispersal vector(s) are still unknown. The plant species' geographic range expansion rates are compared to the actualistic rates of seed dispersal using mathematical models, and are graphically visualized using dispersal kernels.