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
Litter and Root Manipulations Provide Insights into Soil Organic Matter Dynamics and Stability
TL;DR: The Detritus Input and Removal Treatments (DIRT) experiment at Harvard Forest was designed to assess how rates and sources of plant litter inputs control the accumulation and dynamics of organic matter in soils across decadal time scales as discussed by the authors.
The Role of Microbial Communities in the Formation and Decomposition of Soil Organic Matter
Leo M. Condron,Christine H. E. Stark,Maureen O'Callaghan,Peter W. Clinton,Zhiqun Huang +4 more
- 01 Jan 2010
TL;DR: The global pool of organic carbon in soil to a depth of 1 m has been estimated at 1,200-1,550 Pg (2 m: 2,370-2,450 Pg), which is significantly greater than either the biological-biota or atmospheric (760 Pg) carbon pools as discussed by the authors.
125
A meta-analysis of the temporal dynamics of priming soil carbon decomposition by fresh carbon inputs across ecosystems
TL;DR: In this paper, a meta-analysis with extensive datasets of CO2 effluxes from soils with 13C or 14C labelled fresh carbon inputs and without fresh C inputs under various soil conditions was performed to synthesize and assess the temporal dynamics of the priming effect.
122
Surficial gains and subsoil losses of soil carbon and nitrogen during secondary forest development
Megan L. Mobley,Kate Lajtha,Marc G. Kramer,Allan R. Bacon,Allan R. Bacon,Paul R. Heine,Daniel Richter +6 more
TL;DR: It is argued that the land use change from old field to secondary forest drove biogeochemical and hydrological changes throughout the soil profile that enhanced microbial activity and SOM decomposition in subsoils, and when the pine stands aged and began to transition to mixed pines and hardwoods, demands on soil organic matter for nutrients eased, and subsoil organic matter levels stabilized.
121
Characterizing changes in soil bacterial community structure in response to short-term warming.
Jinbo Xiong,Jinbo Xiong,Huaibo Sun,Fei Peng,Huayong Zhang,Xian Xue,Sean M. Gibbons,Sean M. Gibbons,Jack A. Gilbert,Jack A. Gilbert,Haiyan Chu +10 more
TL;DR: Warming significantly changed the structure of the soil bacterial community, but the alpha diversity was not dramatically affected, and certain taxa showed an inconsistent response to the two warming treatments, which suggests complex microbial dynamics that could result from conditional dependencies between bacterial taxa.
121
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