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La regulación específica del régimen de flujo da forma al ciclo de nitrógeno mediado por microbios de la red de ríos
Jiaxin Tong1, Wenlong Zhang1, Feng Yu1
1State Key Laboratory of Water Cycle and Water Security, College of Environment, Hohai University, Nanjing, Jiangsu 210098, PR China.
Water research
|February 10, 2026
Resumen
La desviación del agua afecta a los microbios del río. El mantenimiento de la variabilidad del flujo intermedio mejora la estabilidad microbiana y la autopurificación del ecosistema en las redes fluviales de marea.
Área de la Ciencia:
- Microbiología ambiental microbiología ambiental.
- Ecología fluvial Ecología fluvial.
- La hidrodinámica es la hidrodinámica.
Sus antecedentes:
- Los proyectos de desviación de aguas entre cuencas abordan la escasez de agua pero alteran la hidrodinámica del río.
- Las comunidades microbianas regulan los ciclos biogeoquímicos y la salud del ecosistema en los ríos de marea.
- Los cambios hidrodinámicos de la desviación del agua impactan en una ecología microbiana poco comprendida.
Objetivo del estudio:
- Investigar las respuestas de la comunidad microbiana a diferentes velocidades de flujo en las redes fluviales de mareas.
- Analizar la relación entre la estabilidad hidrológica y la estabilidad de la comunidad microbiana.
- Determinar cómo la variabilidad del flujo influye en la estructura de la red microbiana y las funciones biogeoquímicas.
Principales métodos:
- Muestreo intensivo de campo de agua y sedimentos a través de regímenes de flujo (bajo, medio, alto).
- Modelado hidrodinámico MIKE 11 unidimensional calibrado y modelado hidrodinámico.
- Análisis de la comunidad microbiana utilizando análisis de redes de co-ocurrencia y modelado de ecuaciones estructurales.
Principales resultados:
- La estabilidad de la comunidad microbiana se correlaciona positivamente con la estabilidad del régimen hidrológico.
- La variabilidad del flujo intermedio maximiza la conectividad y la cohesión de la red microbiana.
- Las zonas de alta variabilidad de descarga actúan como puntos calientes para la desnitrificación y el procesamiento de materia orgánica.
Conclusiones:
- La regulación hidrológica impulsa indirectamente los ciclos biogeoquímicos al modular los flujos de nutrientes y la diversidad microbiana.
- Se recomienda mantener la variabilidad del flujo intermedio para mejorar la robustez de la red fluvial y la auto-purificación.
- Las estrategias de gestión deben centrarse en la variabilidad del flujo para apoyar la resiliencia del ecosistema.
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