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Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
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Teoría ecológica. Un modelo general de población de recursos de consumo

Kevin D Lafferty1, Giulio DeLeo2, Cheryl J Briggs3

  • 1Western Ecological Research Center, U.S. Geological Survey, Marine Science Institute, University of California-Santa Barbara, Santa Barbara, CA, USA. klafferty@usgs.gov.

Science (New York, N.Y.)
|August 22, 2015
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Resumen

Este estudio presenta un modelo general para las interacciones entre el consumidor y los recursos, unificando las dinámicas de depredador-presa y parásito-anfitrión. Revela una respuesta funcional de saturación universal y aclara las suposiciones en el modelado ecológico.

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Área de la Ciencia:

  • Ecología
  • Biología matemática
  • Ecología teórica

Sus antecedentes:

  • La dinámica de la red alimentaria está impulsada por las interacciones depredador-presa, parásito-hospedador y planta herbívora.
  • Los modelos existentes a menudo utilizan estados distintos para la actividad del consumidor y la respuesta de los recursos.

Objetivo del estudio:

  • Desarrollar un marco matemático general para las interacciones entre los consumidores y los recursos.
  • Unificar y comparar los diversos modelos ecológicos.
  • Derivar las condiciones para el éxito de los consumidores y analizar los supuestos del modelo.

Principales métodos:

  • Los estados generales definidos de actividad del consumidor (búsqueda, ataque, consumo) y los estados de respuesta de los recursos (susceptibles, expuestos, ingeridos, resistentes).
  • Especificó el modelo general para 11 estrategias de consumo, agrupándolas matemáticamente en depredadores, parásitos y micropredadores.
  • Condiciones derivadas para el éxito del consumidor, incluida una respuesta funcional de saturación.

Principales resultados:

  • Se estableció un marco unificado para analizar y comparar los modelos de recursos del consumidor.
  • Se derivó una respuesta funcional de saturación universal como condición para el éxito del consumidor.
  • El marco facilita la creación de modelos simples con supuestos transparentes y linaje matemático.

Conclusiones:

  • El modelo general proporciona una herramienta poderosa para comprender diversas interacciones ecológicas.
  • La derivación de modelos clásicos de este marco general revela supuestos subyacentes y limitaciones potenciales.
  • Este enfoque mejora la claridad y la comparabilidad en la investigación de modelos ecológicos.