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Los invertebrados del suelo interrumpen el flujo de carbono a través de las redes de hongos
David Johnson1, Martin Krsek, Elizabeth M H Wellington
1School of Biological Sciences, University of Aberdeen, Aberdeen AB24 3UU, UK. D.Johnson@abdn.ac.uk
Science (New York, N.Y.)
|August 16, 2005
Resumen
Los invertebrados del suelo como las colas de primavera tienen un impacto significativo en el ciclo del carbono. Estos organismos reducen la respiración del carbono vegetal en el suelo, destacando la importancia de las interacciones multitróficas en la regulación del flujo de carbono del suelo.
Área de la Ciencia:
- Ecología del suelo Ecología del suelo
- La simbiosis micorrizal es una simbiosis micorrizal.
- El ciclo del carbono.
Sus antecedentes:
- El flujo anual de respiración del suelo es sustancial, excediendo las emisiones de combustibles fósiles diez veces.
- La comprensión de los componentes de la respiración del suelo es crucial, ya que implican interacciones multitróficas complejas.
- Los hongos micorrizales arbusculares simbióticos facilitan un flujo significativo de carbono de las plantas al suelo.
Objetivo del estudio:
- Investigar el papel de los invertebrados del suelo en la regulación del flujo de carbono a través de la respiración de la micorrizosfera.
- Para cuantificar el impacto del invertebrado dominante que se alimenta de hongos, Protaphorura armata, en el ciclo del carbono.
Principales métodos:
- Utilizó la técnica de etiquetado de pulso de 13CO2.
- Estudió los efectos de las densidades naturales de Protaphorura armata (Collembola) en la respiración de la micorrizosfera.
Principales resultados:
- Protaphorura armata redujo el enriquecimiento de 13C en la respiración de la micorrizosfera en un 32%.
- Esto indica una modulación significativa de la reciente respiración fotosintética de las plantas por este invertebrado.
Conclusiones:
- Las interacciones multitróficas son reguladores críticos de la respiración del suelo, particularmente para la fotosíntesis vegetal reciente.
- Los invertebrados del suelo, como Protaphorura armata, juegan un papel clave en el ciclo del carbono del suelo al influir en la asignación de carbono y la respiración.
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