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Comentario a "El carbón derivado del fuego causa pérdida de humus forestal"
1Department of Crop and Soil Sciences, 909 Bradfield Hall, Cornell University, Ithaca, NY 14853, USA. CL273@cornell.edu
Science (New York, N.Y.)
|September 6, 2008
Resumen
El carbón derivado del fuego puede acelerar la pérdida de las reservas de carbono de los bosques. Esta pérdida de carbono puede implicar tanto la degradación del humus como la del carbón vegetal, sin que se conozcan los mecanismos exactos de la mineralización o la exportación física.
Área de la Ciencia:
- Ecología forestal ecología forestal.
- Ciencias del suelo Ciencias del suelo.
- Biogeoquímica La biogeoquímica es la bioquímica.
Sus antecedentes:
- El carbón derivado del fuego puede influir en la dinámica de la materia orgánica del suelo.
- Investigaciones anteriores indicaron que el carbón vegetal promueve el humus forestal y la pérdida de carbono subterráneo.
Objetivo del estudio:
- Investigar los mecanismos detrás de la pérdida de carbono en las mezclas de carbón vegetal y humus.
- Para determinar si la pérdida de carbono se debe a la degradación del humus, la pérdida de carbón vegetal o ambas cosas.
- Diferenciar entre la mineralización y la exportación física como causas de pérdida de carbono.
Principales métodos:
- Análisis de mezclas de carbón vegetal y humus.
- Cuantificación de la pérdida de carbono.
- Investigación de las vías de degradación (mineralización frente a la exportación física).
Principales resultados:
- La pérdida de carbono de las mezclas de carbón vegetal y humus se puede atribuir tanto al humus como a la degradación del carbón vegetal.
- Los procesos específicos que impulsan esta pérdida (mineralización a CO2 o exportación física) requieren más aclaraciones.
Conclusiones:
- El impacto del carbón vegetal en el carbono del suelo es complejo, ya que implica la pérdida tanto de materia orgánica como del propio carbón vegetal.
- Se necesita más investigación para dilucidar las vías precisas de pérdida de carbono de estas mezclas.
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