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Los hongos micorrícicos arbusculares aumentan la descomposición del carbono orgánico bajo niveles elevados de CO2
Lei Cheng1, Fitzgerald L Booker, Cong Tu
1Department of Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA.
Science (New York, N.Y.)
|September 1, 2012
Resumen
El aumento del dióxido de carbono (CO) puede no aumentar el secuestro de carbono en el suelo. El aumento de la actividad de los hongos micorrízicos arbusculares (AMF) debido al CO2 parece causar importantes pérdidas de carbono en el suelo, desafiando las suposiciones de mitigación del cambio climático.
Área de la Ciencia:
- Ciencias del medio ambiente Ciencias del medio ambiente.
- Ciencias del suelo Ciencias del suelo.
- La micología de la micología.
Sus antecedentes:
- Se debate la capacidad de secuestro de carbono de los ecosistemas terrestres.
- Se cree que los hongos micorrizales arbusculares (AMF) mejoran el secuestro de carbono en el suelo.
- Esto se atribuye al aumento de la entrada de carbono y la protección de la materia orgánica a través de la agregación.
Objetivo del estudio:
- Investigar el impacto del dióxido de carbono atmosférico elevado (CO2) en el AMF y el carbono del suelo.
- Desafiar la suposición de que el AMF estimula el secuestro de carbono en el suelo.
Principales métodos:
- Cuatro experimentos independientes en el microcosmos.
- Cuatro experimentos de campo independientes.
Principales resultados:
- La mejora de la AMF condujo a pérdidas sustanciales de carbono en el suelo.
- La evidencia contradice el papel protector de la AMF contra la degradación del carbono orgánico.
Conclusiones:
- Se cuestiona el papel de la AMF en el secuestro de carbono en el suelo bajo niveles elevados de CO2).
- Las predicciones actuales del balance de carbono del ecosistema terrestre pueden necesitar revisión.
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