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Updated: Sep 10, 2025

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La vegetación cambia la trayectoria de las curvas del río

Michael Hasson1, Alvise Finotello2, Alessandro Ielpi3

  • 1Department of Earth and Planetary Sciences, Stanford University, Stanford, CA, USA.

Science (New York, N.Y.)
|August 21, 2025
PubMed
Resumen

La evolución de las plantas alteró significativamente la dinámica de los ríos. La vegetación cambia la forma en que las curvas de los ríos migran, aumentando la variación de la dirección de flujo inferida y explicando los patrones de depósito de ríos antiguos.

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Área de la Ciencia:

  • Ciencias de la Tierra
  • Paleontología
  • Hidrología

Sus antecedentes:

  • Una teoría de larga data postula que la evolución de las plantas, hace unos 425 millones de años, desencadenó el serpenteo de los ríos.
  • Los hallazgos recientes de ríos serpenteantes en paisajes estériles desafían esto, dejando inexplicable el cambio paleozoico en la geometría de los depósitos fluviales.

Objetivo del estudio:

  • Investigar el impacto de la vegetación en la migración de las curvas de los ríos.
  • Para explicar el aumento observado en la sinuosidad de los depósitos fluviales después de la evolución de las plantas terrestres.

Principales métodos:

  • Utilizó imágenes satelitales para monitorear los patrones de migración de los ríos modernos.
  • Analizó el efecto de la vegetación de la orilla en la acreción de la barra puntual y la dirección del flujo.

Principales resultados:

  • Se encontró que la vegetación del banco cambiaba la orientación de la acreción de la barra puntual.
  • Esta alteración dio lugar a un aumento del 62% en la varianza inferida de la dirección del flujo.

Conclusiones:

  • La vegetación influye en la dinámica espacial de las curvas de los ríos.
  • Este mecanismo explica el reconocimiento insuficiente de los ríos serpenteantes en los registros geológicos previos a la vegetación.