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
Elevated atmospheric CO2 drives decreases in stable soil organic carbon in arid ecosystems: Evidence from a physical fractionation and organic compound analysis.
Kelsey H Jensen,A. Stuart Grandy,Jed P. Sparks +2 more
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Blue carbon in coastal freshwater/brackish marshes on the barrier islands of virginia: belowground carbon dynamics
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TL;DR: Sedghi et al. as mentioned in this paper examined brackish/freshwater marshes on Virginia barrier islands for possible roles as blue carbon systems, and found that these sites do not store as much carbon as salt marshes, but appear comparable to seagrass beds (138 ± 38 g C m yr), and therefore have some blue carbon potential.
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