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Las estructuras de las redes tróficas vinculan procesos multiescala en paisajes complejos

Holly A L Harris1, Jonathan D Tonkin1,2,3, Tara J Murray4

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Este resumen es generado por máquina.

Las estructuras de las redes tróficas en paisajes fluviales complejos revelan cómo la heterogeneidad espacial y las adaptaciones de los consumidores dan forma a los procesos del ecosistema. Esta investigación ayuda a identificar los factores clave que estabilizan las redes tróficas en diferentes escalas.

Palabras clave:
río dinámicored tróficaestructura de la red tróficaheterogeneidad del paisajeisótopo estable

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Área de la Ciencia:

  • Ecología; Ciencias Ambientales; Ecosistemas Fluviales

Sus antecedentes:

  • El estudio de paisajes complejos es un desafío debido a los procesos simultáneos de alto nivel contextual y de bajo nivel mecanicista.
  • Las estructuras de las redes tróficas ofrecen información sobre estos procesos dentro de contextos ecológicos específicos.

Objetivo del estudio:

  • Utilizar isótopos estables para identificar recursos espacialmente distintos e inferir flujos de recursos en una red trófica de río trenzado.
  • Comprender cómo las estructuras de las redes tróficas se relacionan con los procesos ecológicos y mecanicistas en paisajes complejos.

Principales métodos:

  • Análisis de isótopos estables para rastrear el uso de recursos por parte de consumidores móviles (aves, peces).
  • Identificación de recursos espacialmente heterogéneos dentro de un sistema de río trenzado.
  • Análisis del uso de recursos por parte de los consumidores en relación con los atributos estructurales de la red trófica.

Principales resultados:

  • Se encontró que los recursos fluviales utilizados por los consumidores móviles eran espacialmente heterogéneos.
  • El uso de recursos por parte de los consumidores se correlacionó con la variación en la alimentación espaciotemporal, los subsidios, la omnivoría y los cambios de nicho ontogenéticos.
  • Tanto la heterogeneidad del paisaje físico como los rasgos adaptativos de los consumidores influyen en las estructuras de las redes tróficas.

Conclusiones:

  • Las redes tróficas fluviales complejas están formadas por interacciones entre el contexto del paisaje físico y las adaptaciones de los consumidores.
  • El análisis de las estructuras de las redes tróficas a través de escalas de uso y distribución de recursos ayuda a identificar procesos estabilizadores.
  • Este enfoque proporciona un marco para comprender la dinámica de los ecosistemas en entornos heterogéneos.