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Lobos, alces y la alometría de los ciclos poblacionales
Science (New York, N.Y.)
|June 22, 1984
Resumen
Isle Royale es una isla real.
Área de la Ciencia:
- Ecología Ecología Ecología.
- Biología de la Vida Silvestre Biología de la Vida Silvestre
- Dinámica de las poblaciones.
Sus antecedentes:
- El Parque Nacional Isle Royale alberga un sistema único de depredadores y presas que incluye lobos y alces.
- Este ecosistema ha experimentado fluctuaciones significativas de la población durante varias décadas.
Objetivo del estudio:
- Para analizar los ciclos de población a largo plazo de lobos y alces en Isle Royale.
- Para investigar la relación entre la dinámica depredador-presa y los ciclos de la población de herbívoros.
Principales métodos:
- Análisis de los datos históricos de la población de lobos y alces desde 1950 hasta 1983.
- Modelado estadístico para determinar la duración del período del ciclo y los intervalos de confianza.
Principales resultados:
- Las poblaciones de lobos y alces en Isle Royale volvieron a los niveles de la década de 1950 en 1983 después de una década de fluctuaciones.
- Se identificó un ciclo depredador-presa con un período de aproximadamente 38 años (+/-13 años).
- La longitud del ciclo observada se alinea con los principios de escalado alométrico que relacionan la masa corporal con la duración del ciclo de la población.
Conclusiones:
- El sistema lobo-alce de Isle Royale exhibe una dinámica cíclica a largo plazo.
- La duración del período del ciclo poblacional en los herbívoros puede ser predecible en función de la masa corporal, lo que apoya las teorías de escalado alométrico.
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