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Comentario sobre "Convergencia global en la sensibilidad a la temperatura de la respiración a nivel de ecosistemas"
Alexander Graf1, Lutz Weihermüller, Johan A Huisman
1Forschungszentrum Juelich, Agrosphere Institute (IBG-3), Institute for Bio- and Geosciences, Juelich, Germany. a.graf@fz-juelich.de
Science (New York, N.Y.)
|March 12, 2011
Resumen
La respiración del ecosistema respiración de los ecosistemas.
Área de la Ciencia:
- Ecología y ciencias ambientales, centradas en los procesos de los ecosistemas.
Sus antecedentes:
- Estudios anteriores informaron de la sensibilidad a la temperatura de la respiración del ecosistema (Q(10)) y su variabilidad.
- Mahecha y otros. estimó un Q ((10) más bajo que el reportado anteriormente.
Objetivo del estudio:
- Para reevaluar la sensibilidad a la temperatura de la respiración del ecosistema (Q(10).
- Para hacer frente a la subestimación de Q(10) debido a la mala penetración de las fluctuaciones de temperatura en el suelo.
Principales métodos:
- Análisis de los datos de respiración de los ecosistemas.
- Modelado del impacto de las fluctuaciones de temperatura en la penetración del suelo.
Principales resultados:
- El valor Q10 de 1,4 es una subestimación de las sensibilidades promedio de todos los componentes del ecosistema.
- Las fluctuaciones rápidas de temperatura penetran poco en el suelo, lo que afecta a las mediciones de la respiración.
Conclusiones:
- La sensibilidad a la temperatura de la respiración del ecosistema es menor de lo que se pensaba cuando se considera la profundidad del suelo.
- La estimación precisa de Q(10) requiere tener en cuenta los efectos de amortiguación térmica dentro del perfil del suelo.
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