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
Impacts of an invasive grass on soil organic matter pools vary across a tree-mycorrhizal gradient
TL;DR: In this article, the authors quantified the effects of the invasive C4 grass, Microstegium vimineum, on soil organic matter (SOM) in three temperate forests across plots varying in their relative abundance of arbuscular mycorrhizal (AM) versus ectomycorrhizaal (ECM) trees, consistent with the hypothesis that invader-derived C inputs should stimulate decomposers to acquire nitrogen from unprotected SOM in soils with low nitrogen availability.
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Effects of added organic matter and water on soil carbon sequestration in an arid region.
Liming Lai,Yufei Li,Yuan Tian,Lianhe Jiang,Xuechun Zhao,Linhai Zhu,Xi Chen,Yong Gao,Shaoming Wang,Yuanrun Zheng,Glyn M. Rimmington +10 more
TL;DR: The results suggested that added FOM quickly decomposed and had minor effects on the soil organic carbon (SOC) pool to a depth of 30 cm and concluded that short-term FOM input into the belowground soil and water addition do not affect the SOC pool in shrubland in an arid region.
Priming effect and its regulating factors for fast and slow soil organic carbon pools: A meta-analysis
TL;DR: Using meta-analysis in combination with boosted regression tree (BRT) analysis, this paper evaluated the relative contribution of multiple drivers of priming effect with substrate and their patterns across each driver gradient.
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Rapid fine root C and N mineralization in a northern temperate forest soil.
TL;DR: In this article, the influence of long-term aboveground and/or belowground litter and inorganic N additions on mineralization and vertical transport of fine root-derived C and N during the first 2 years of decomposition of dead fine root in the field was examined.
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Soil organic carbon depletion and degradation in surface soil after long-term non-growing season warming in High Arctic Svalbard.
Philipp R. Semenchuk,Philipp R. Semenchuk,Philipp R. Semenchuk,Eveline J. Krab,Eveline J. Krab,Mattias Hedenström,Carly A. Phillips,Francisco Javier Ancin-Murguzur,Elisabeth J. Cooper +8 more
TL;DR: It is concluded that a positive feedback of carbon losses from surface soils of Arctic dwarf shrub tundra to anthropogenic forcing will be minor, but not negligible, and the bulk of warming induced ER increases may originate from surface and not deep active layer or permafrost horizons.
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