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Migration00:53

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Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
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Threats to Biodiversity01:50

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There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
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Symbiosis00:58

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Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
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What is Biodiversity?01:19

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Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
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Keystone Species01:39

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Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
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Habitat Fragmentation02:31

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Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
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Video Experimental Relacionado

Updated: May 1, 2026

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern
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Los animales migratorios combinan biodiversidad y ecosistemas que funcionan en todo el mundo.

S Bauer1, B J Hoye

  • 1Department of Bird Migration, Swiss Ornithological Institute, 6204 Sempach, Switzerland.

Science (New York, N.Y.)
|April 5, 2014
PubMed
Resumen

Las migraciones de animales son cruciales para la biodiversidad global, ya que influyen en los ecosistemas al transportar nutrientes y alterar las redes alimentarias. Comprender estos movimientos es clave para comprender las redes ecológicas y la dinámica de la comunidad.

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Área de la Ciencia:

  • Ciencia de la ecología y la biodiversidad.
  • Dinámica de los ecosistemas y redes alimentarias.
  • Comportamiento y conservación de los animales.

Sus antecedentes:

  • Las migraciones de animales implican un gran número de individuos a través de diversos taxones, moviendo nutrientes y energía a nivel mundial.
  • Estos movimientos predecibles son un aspecto significativo, pero a menudo pasado por alto, de la biodiversidad.
  • Los animales migratorios son parte integral de las comunidades residentes, influyendo en los procesos ecológicos.

Objetivo del estudio:

  • Revisar y destilar los procesos fundamentales por los cuales los animales migratorios influyen en las comunidades y los ecosistemas.
  • Para demostrar los impactos únicos de la migración en el flujo de energía, las redes alimentarias y las cascadas tróficas.
  • Proponer un marco integrador para considerar la migración en los estudios ecológicos.

Principales métodos:

  • Revisión de la literatura científica y ejemplos en todo el reino animal.
  • Análisis de los impactos ecológicos de las migraciones de animales en la estructura de la comunidad y el funcionamiento del ecosistema.
  • Síntesis de los resultados para desarrollar un marco conceptual.

Principales resultados:

  • Los animales migratorios alteran significativamente el flujo de energía, la topología de la red alimentaria y la estabilidad.
  • Las migraciones pueden iniciar o modificar cascadas tróficas e influir en la estructura de la metacomunidad.
  • Estos movimientos representan una dimensión poderosa y subestimada de la biodiversidad.

Conclusiones:

  • Las migraciones de animales son una fuerza crítica, pero subestimada, que da forma a las redes ecológicas en todo el mundo.
  • Se necesita un marco integrador que considere explícitamente la migración para los estudios comunitarios y de ecosistemas.
  • Reconocer el papel de la migración es esencial para comprender y gestionar la biodiversidad global y los servicios ecosistémicos.