Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Biology The separation or division of a group of organisms by a geographic barrier, such as a mountain or a body of water, resulting in differentiation of the original group into new varieties or species.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The separation of a group of organisms by a geographic barrier, resulting in differentiation of the original group into new varieties or species
  • n. The geological event which produces such a barrier (volcano, earthquake, etc)
  • n. The act of experiencing an event by proxy through an empathic link with the person who is experiencing the event firsthand.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

From vicariant, from Latin vicārius, vicarious; see vicarious.

Examples

  • Another phenomenon of biological interest in this ecoregion is vicariance, due to the polar distribution between the west and east of the country.

    Cuban pine forests

  • Another interesting biological phenomenon in this ecoregion is vicariance, due to the polar distribution between the west and east of the country.

    Cuban moist forests

  • These forests have many taxons that show a geographic vicariance with the pine trees in the western part of the country.

    Cuban pine forests

  • So whether mekosuchines owe their distribution to dispersal or vicariance, we can be quite confident that they inhabited islands in the south-west Pacific where their presence has yet to confirmed.

    Archive 2006-09-01

  • If vicariance was the major control on mekosuchine distribution in the south-west Pacific, then mekosuchines ‘might be expected to be found on other islands in the New Zealand-New Caledonia-Fiji-Solomons region, but not as far east as Tonga or Samoa’ (Molnar et al. 2002, p. 626).

    Archive 2006-09-01

  • The antiquity of the divergences within Agamidae has proved controversial, with some authors arguing that the major clades diverged as a consequence of Gondwanan vicariance (Macey et al. 2000).

    Archive 2006-12-01

  • View two – the vicariance model – proposes that mekosuchines may have been present on New Caledonia, Fiji and elsewhere prior to their separation of these land masses from the Australian plate.

    Archive 2006-09-01

  • Heads (2001a) argued that the birds must be the products of vicariance: the areas where they occur were formerly close, but as the microterranes moved, the birds have simply been ultra-sedentary and gone with them.

    Archive 2006-03-01

  • The speaker explained it thus: as the Americas and the Old World rifted apart in distant geological times, the ancestral manatee species got separated and, presto, a vicariance event resulted in speciation.

    Archive 2006-01-01

  • Birds of paradise, vicariance biogeography and terrane tectonics in New Guinea.

    Archive 2006-03-01

Comments

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  • Ma Nature conducts such a merry dance

    Ingeniously fostering variance,

    With tectonic drift

    And mountains’ uplift

    Deployed in the cause of vicariance.

    May 18, 2018