Journal Article10.1111/J.1461-0248.2004.00579.X
Carbon input to soil may decrease soil carbon content
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TL;DR: In this article, a negative relationship between primary production and soil carbon (C) content is found, and the authors conclude that energy available to soil microbes and microbial competition are important determinants of soil C decomposition.
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Abstract: It is commonly predicted that the intensity of primary production and soil carbon (C) content are positively linked. Paradoxically, many long-term field observations show that although plant litter is incorporated to soil in large quantities, soil C content does not necessarily increase. These results suggest that a negative relationship between C input and soil C conservation exists. Here, we demonstrate in controlled conditions that the supply of fresh C may accelerate the decomposition of soil C and induce a negative C balance. We show that soil C losses increase when soil microbes are nutrient limited. Results highlight the need for a better understanding of microbial mechanisms involved in the complex relationship between C input and soil C sequestration. We conclude that energy available to soil microbes and microbial competition are important determinants of soil C decomposition.
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Citations
Tracing the dynamics of dissolved organic matter in marine systems exposed to natural and experimental perturbations
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- 20 Jul 2023
TL;DR: La dinámica de la materia orgánica disuelta (DOM) en los sistemas marinos es influenciada por una amplia gama de procesos, entre ellos la degradación por microorganismos, la producción de nuevos compuestos orgánicos y la exportación a las capas profundas. La DOM es un importante almacenador de carbono en los océanos, y su dinámica juega un papel fundamental en el balance del carbono en la atmósfera.
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