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El carbón derivado del fuego causa la pérdida de humus forestal
David A Wardle1, Marie-Charlotte Nilsson, Olle Zackrisson
1Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE901-83 Umeå, Sweden. david.wardle@svek.slu.se
Science (New York, N.Y.)
|May 3, 2008
Resumen
El carbón vegetal derivado del fuego, si bien es un sumidero de carbono a largo plazo, puede acelerar la pérdida de carbono del suelo forestal al aumentar la actividad microbiana. Este estudio revela que el carbón vegetal es
Área de la Ciencia:
- Ciencias forestales Ciencias forestales.
- Ciencias del suelo Ciencias del suelo.
- La investigación sobre el cambio climático investiga el cambio climático.
Sus antecedentes:
- El fuego es un factor global significativo que influye en el almacenamiento de carbono.
- El carbono negro (carbón vegetal) de los incendios es un componente persistente del suelo, a menudo considerado un sumidero de carbono.
- Comprender el impacto a largo plazo del carbón vegetal en el carbono del suelo es crucial para los modelos climáticos.
Objetivo del estudio:
- Para investigar el efecto del carbón vegetal derivado del fuego en la dinámica del carbono del suelo forestal.
- Para determinar si el carbón vegetal influye en la actividad microbiana en los bosques boreales.
- Evaluar el impacto neto del carbón vegetal en el secuestro de carbono del suelo a lo largo del tiempo.
Principales métodos:
- Se llevó a cabo un experimento de campo de 10 años en tres estadios distintos de bosques boreales.
- El experimento monitoreó los cambios en el humus forestal y el carbono del suelo.
- La actividad microbiana en el suelo se midió en presencia de carbón vegetal.
Principales resultados:
- Se descubrió que el carbón derivado del fuego promueve la pérdida de humus forestal.
- Esta pérdida de carbono se correlacionó con una mayor actividad microbiana estimulada por el carbón vegetal.
- El experimento demostró una interacción significativa entre el carbón vegetal, los microbios y el carbono del suelo.
Conclusiones:
- El papel del carbón vegetal como un sumidero de carbono del suelo a largo plazo puede ser parcialmente negado por su capacidad para acelerar la pérdida de carbono.
- La descomposición microbiana mejorada impulsada por el carbón vegetal puede compensar los beneficios del secuestro de carbono.
- Se necesita más investigación para comprender completamente el complejo papel del fuego y el carbón en los ciclos de carbono de los bosques.
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