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¿Una respuesta al carbono ecológicamente inverosímil?

Wim de Vries¹, Svein Solberg, Matthias Dobbertin

¹Alterra, Wageningen University and Research Centre, PO Box 47, 6700 AA Wageningen, The Netherlands. wim.devries@wur.nl

|February 15, 2008

Resumen

Un estudio encontró un fuerte vínculo entre la deposición de nitrógeno y la absorción de carbono en los ecosistemas. Sin embargo, un análisis más detallado sugiere que esta respuesta de secuestro de carbono al nitrógeno es probablemente mucho menor de lo que se informó inicialmente.

Área de la Ciencia:

Ecología Ecología Ecología.
Ciencias ambientales Ciencias ambientales.
Biogeoquímica La biogeoquímica es la bioquímica.

Sus antecedentes:

La producción neta de ecosistemas (NEP), la tasa neta de acumulación de carbono en los ecosistemas, está influenciada por varios factores ambientales.
Investigaciones anteriores sugirieron una fuerte correlación positiva entre la deposición de nitrógeno húmedo (N) y el NEP.

Objetivo del estudio:

Evaluar la plausibilidad ecológica de la relación reportada entre la deposición de N y la NEP.
Investigar cómo la productividad del sitio y los factores ambientales modulan la respuesta del NEP a la deposición de N.

Principales métodos:

Análisis multifactorial de las mediciones forestales europeas.
Análisis estadístico de las interacciones entre la deposición de N, la productividad del sitio y las variables ambientales.

Principales resultados:

El estudio cuestiona la alta respuesta NEP (725 kg C por kg N) reportada por Magnani et al.
Las interacciones con la productividad del sitio y el medio ambiente sugieren una respuesta NEP significativamente menor a la deposición de N.

Conclusiones:

La relación entre la deposición de N y el secuestro de C es compleja e influenciada por múltiples factores.
Se necesita una comprensión más matizada para predecir con precisión la dinámica del ecosistema C bajo los cambiantes regímenes de deposición de N.

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