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
Interactive priming effect of labile carbon and crop residues on SOM depends on residue decomposition stage : Three-source partitioning to evaluate mechanisms
Muhammad Shahbaz,Muhammad Shahbaz,Amit Kumar,Amit Kumar,Yakov Kuzyakov,Yakov Kuzyakov,Gunnar Börjesson,Evgenia Blagodatskaya,Evgenia Blagodatskaya +8 more
TL;DR: In this paper, the effects of adding labile C (40μg glucose-C g−1 soil) together with wheat shoot or root residues (3.1μg C g− 1 soil) on SOM priming at three residue decomposition stages were investigated.
Soil CO2–C flux and carbon storage in the dry tropics: Impact of land-use change involving bioenergy crop plantation
TL;DR: In this paper, the impact of land-use change in the dry tropics on soil CO2-C flux and soil organic carbon (SOC) storage, along with the major factors controlling them i.e. soil microbial biomass (SMB), belowground net productivity (BNP), and soil aggregate size fractions.
Effects of litter manipulation on litter decomposition in a successional gradients of tropical forests in southern China.
Hao Chen,Geshere Abdisa Gurmesa,Lei Liu,Tao Zhang,Shenglei Fu,Zhanfeng Liu,Shaofeng Dong,Chuan Ma,Jiangming Mo +8 more
TL;DR: It is suggested that change in litter quantity can affect litter decomposition, and this impact may become stronger with forest succession in tropical forest ecosystem.
Increased coniferous needle inputs accelerate decomposition of soil carbon in an old-growth forest
Susan E. Crow,Susan E. Crow,Kate Lajtha,Richard D. Bowden,Yuriko Yano,Justin B. Brant,Bruce A. Caldwell,Elizabeth W. Sulzman +7 more
TL;DR: In this paper, the authors experimentally doubled needle litter inputs, and found that actual soil respiration rates exceeded those expected due to the C added by the extra needles, and they estimated that this "priming effect" accounted for 11.5-21.6% of annual CO2 efflux from litter-amended plots, or an additional 137-256-g−C−m−2−yr−1 loss of stored C to the atmosphere.
The analysis of biodiversity experiments: from pattern toward mechanism
Andy Hector,Thomas Bell,John Connolly,John A. Finn,Jeremy W. Fox,Laura Kirwan,Michel Loreau,Jennie R. McLaren,Bernhard Schmid,Alexandra Weigelt +9 more
- 30 Jul 2009
TL;DR: This chapter concludes that the current toolbox of methods allows investigation of the mechanisms for most, if not all, biodiversity and ecosystem functioning experiments conducted to date that manipulate species within a single trophic level (e.g. plant biodiversity experiments).
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