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Sobrecompensación y ciclos de población en un ungulado
B T Grenfell1, O F Price, S D Albon
1Zoology Department, University of Cambridge, UK.
Nature
|February 27, 1992
Resumen
La alta sobrecompensación de la mortalidad dependiente de la densidad puede causar accidentes de población recurrentes en los vertebrados. Este mecanismo, raramente considerado para los vertebrados, explica las fluctuaciones poblacionales observadas en las ovejas de soja.
Área de la Ciencia:
- Ecología Ecología Ecología.
- Dinámica de las poblaciones.
- Zoología de los vertebrados Zoología de los vertebrados.
Sus antecedentes:
- Los modelos teóricos sugieren que la dependencia sobrecompensatoria de la densidad puede causar fluctuaciones de la población.
- Los modelos de población de invertebrados a menudo carecen de suficiente sobrecompensación para los ciclos sostenidos.
- El papel de la sobrecompensación en los ciclos de la población de vertebrados sigue siendo poco explorado.
Objetivo del estudio:
- Investigar si la mortalidad dependiente de la densidad sobrecompensatoria puede generar ciclos de población en vertebrados.
- Para explicar los accidentes poblacionales recurrentes observados en las poblaciones de ovejas Soay.
Principales métodos:
- Análisis de los patrones de mortalidad dependientes de la densidad.
- Modelado de la dinámica de la población con una fuerte sobrecompensación.
Principales resultados:
- La alta sobrecompensación de la mortalidad dependiente de la densidad puede generar accidentes recurrentes de la población.
- Los accidentes observados en ovejas de soja se alinean con este modelo de mortalidad sobrecompensatoria.
- La mortalidad está fuertemente concentrada dentro de un estrecho rango de densidad de población.
Conclusiones:
- La sobrecompensación es un mecanismo viable para generar ciclos de población en los vertebrados.
- Este mecanismo explica los intervalos de choque observados en las poblaciones de ovejas de soja.
- Comprender la mortalidad dependiente de la densidad es crucial para la gestión de la población de vertebrados.
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