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JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning
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Una base teórica para los patrones regulares de vegetación a escala múltiple

Corina E Tarnita1,2, Juan A Bonachela3, Efrat Sheffer4

  • 1Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08544, USA.

Nature
|January 20, 2017
PubMed
Resumen
Este resumen es generado por máquina.

Los patrones ecológicos como los círculos de hadas surgen de una combinación de la competencia de las plantas y la actividad animal. La integración de estos mecanismos explica los complejos patrones de vegetación y la resiliencia del ecosistema.

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Área de la Ciencia:

  • Ecología
  • Ecología teórica
  • Dinámica de los ecosistemas

Sus antecedentes:

  • Los patrones de vegetación autoorganizados, como los círculos de hadas, están muy extendidos, pero sus mecanismos de formación se debaten.
  • Existen dos hipótesis principales: las retroalimentaciones dependientes de la escala entre las plantas y los ingenieros de ecosistemas subterráneos como los insectos sociales.
  • Las teorías existentes carecen de validación empírica y un marco unificador para la formación de patrones complejos.

Objetivo del estudio:

  • Desarrollar una base teórica general para la autoorganización social de las colonias de insectos y su papel en el patrón de la vegetación.
  • Investigar los efectos combinados de la competencia vegetal y la actividad animal en los patrones de vegetación.
  • Explicar el patrón a escala múltiple y las funciones mejoradas del ecosistema observadas en sistemas como los círculos de hadas del desierto de Namib.

Principales métodos:

  • Desarrolló un marco teórico general para la autoorganización social de las colonias de insectos.
  • Validar el modelo teórico utilizando datos de cuatro continentes.
  • Recogió y analizó datos de campo de los círculos de hadas del desierto de Namib para estudiar patrones a escala múltiple.

Principales resultados:

  • Demostró que la competencia intraespecífica entre animales territoriales puede generar patrones de vegetación hexagonales.
  • Se demostró que ni la competencia de las plantas ni la actividad animal por sí solas explican patrones complejos a múltiples escalas.
  • Se identificaron interacciones dinámicas entre ambos mecanismos como cruciales para las propiedades emergentes como la resistencia a la sequía.

Conclusiones:

  • Un marco teórico unificado que combina la competencia de las plantas y la autoorganización inducida por los animales explica los patrones complejos de la vegetación.
  • Los insectos sociales juegan un papel importante en la generación de patrones regulares de vegetación a nivel mundial.
  • La integración de múltiples mecanismos de autoorganización es esencial para comprender las funciones y la resiliencia del ecosistema.