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
Soil enzyme activity and stoichiometry in secondary grasslands along a climatic gradient of subtropical China.
TL;DR: In this paper , the authors investigated the spatial pattern of the activities of five soil hydrolyzing enzymes (β-D-cellobiohydrolase (CB), β-1,4-glucosidase (BG), NAG, L-leucine aminopeptidases (LAP), and acid phosphatase (AP) across a 600-km climatic gradient in secondary grasslands of subtropical China.
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Quantification of dung carbon incorporation in a temperate grassland soil following spring application using bulk stable carbon isotope determinations.
TL;DR: Results of forage fibre analyses of the two dung types revealed significant differences in composition which may affect subsequent calculations of percentage dung incorporation based on bulk δ13C values.
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Small-scale burial of macroalgal detritus in marine sediments: Effects of Ulva spp. on the spatial distribution of macrofauna assemblages
TL;DR: Investigation of small-scale burial of Ulva spp.
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Increased uncertainty in soil carbon stock measurement with spatial scale and sampling profile depth in world grasslands: A systematic analysis
TL;DR: In this article, the authors quantified the uncertainty of soil organic carbon (SOC) stock measurement from a global analysis of 51 research articles meeting strict requirements of rigour of soil measurements, totaling 177 grasslands from 19 countries, and explored the implications for SOC stock change detection involving future sampling.
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Plant roots alter microbial functional genes supporting root litter decomposition
Shengjing Shi,Shengjing Shi,Donald J. Herman,Donald J. Herman,Zhili He,Jennifer Pett-Ridge,Liyou Wu,Jizhong Zhou,Jizhong Zhou,Jizhong Zhou,Mary K. Firestone,Mary K. Firestone +11 more
TL;DR: It is indicated that plant root effects on the multiple soil environmental and microbial mechanisms involved in root litter decomposition act through changing the functional gene profiles of microbial decomposers living near plant roots.
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