The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes

Meyer, Nele; Welp, Gerhard; Amelung, Wulf

doi:10.1002/2017gb005644

Cited by 167 publications

(117 citation statements)

References 71 publications

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“…A clear picture presented that labile SOC is less sensitive to warming than recalcitrant SOC by using three methods (Figure ). Our findings were in line with the CQT hypothesis that recalcitrant SOC is more sensitive to warming than labile SOC, which was supported by some individual studies (e.g., Leifeld & Fuhrer, ; Conant et al, ; Craine et al, ; Lefèvre et al, ; Meyer et al, ). Although the kinetic theory underlying the CQT hypothesis (Davidson & Janssens, ), it is well applied only if SOC recalcitrance solely determines decomposition rates.…”

Section: Discussionsupporting

confidence: 91%

“…Furthermore, apparent increases in soil C availability at high temperature (Kadlec & Reddy, ) may intensify microbial nutrient limitation. In comparison with previous individual studies (Balogh et al, ; Meyer et al, ; Zheng et al, ), our work obtained a broad range of SOC concentration (0.5–551.6 g/kg), which may enable us to observe this threshold. Therefore, we can also assume that the various ranges of SOC contents in individual studies may cause the different correlations between Q 10 and SOC content.…”

Section: Discussionsupporting

confidence: 70%

“…Boxes show the 25% and 75% percentiles, and the black dots represent the mean of Q 10 value. Data below the box denote the sample number C r o p l a n d F o r e s t G r a s s l a n d T u n d r a P e a t l a n d W e t l a n d A n t a r c t i c among certain types of terrestrial ecosystems (Haddix et al, 2011;Meyer, Welp, & Amelung, 2018;Pang, Zhu, Lü, & Cheng, 2015).…”

Section: Q 10 In Different Ecosystems and Influencing Factorsmentioning

confidence: 99%

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Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms

et al. 2019

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The response of soil organic carbon (SOC) decomposition to global warming is a potentially major source of uncertainty in climate prediction. However, the magnitude and direction of SOC cycle feedbacks under climate warming remain uncertain because of the knowledge gap about the global‐scale spatial pattern and temperature sensitivity (Q10) mechanism of SOC decomposition. Here, we collected data of Q10 and corresponding soil variables from 81 peer‐reviewed papers using laboratory incubation to explore how Q10 varied among different ecosystems at the global scale and whether labile and recalcitrant SOC pools had equal Q10 values. Q10 with a global average of 2.41 substantially varied among different ecosystems, ranging from the highest in cropland soils (2.76) and the lowest in wetland soils (1.84). Hump‐shaped correlations of Q10 values with the maximum at SOC = 190 g/kg and the minimum at clay = 37% were observed. However, the main influencing factors of Q10 differed among various ecosystems. Q10 values showed a clear decrease with increasing incubation temperature but no significant decrease above 25°C. In general, labile SOC was less sensitive than recalcitrant SOC to warming. Structural equation model analyses showed that total N and SOC accounted for 53% and 46%, respectively, of the variation in Q10 of labile SOC and recalcitrant SOC. This finding suggested that Q10 values of labile and recalcitrant SOC pools had different controlling factors. Our findings highlighted the importance of Q10’s variations in ecosystem types and the response of recalcitrant SOC to warming in predicting the soil C cycling and its feedback to climate change. Therefore, ecosystem type and difference in Q10 of labile and recalcitrant SOC should be considered to precisely predict the soil C dynamics under global warming. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.13256/suppinfo is available for this article.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 70%

Section: Q 10 In Different Ecosystems and Influencing Factorsmentioning

confidence: 99%

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Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms

et al. 2019

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“…In the compost treatments, the lowest Q 10 value of Rh was present in BPFS. The Q 10 of Rh may not altered by the organic C quantity as observed here and by Meyer et al () but depend on C quality, with positive, negative, and nonsignificant relationships all being reported in the literature (Karhu et al, ). We found that the Q 10 of Rh increased with decreasing carbohydrates, proteins, and phenolic C, and increasing V/VSC (Figure ).…”

Section: Discussionsupporting

confidence: 78%

Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Chen

Castellano

et al. 2019

JGR Biogeosciences

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Understanding autotrophic (Ra) and heterotrophic (Rh) components of soil respiration (Rs) and their temperature sensitivity (Q10) is critical for predictingsoil carbon (C) cycle and its feedback to climate change. In agricultural systems, these processes can be considerably altered by chemical fertilizer and compost application due to changes in nitrogen (N) supply and substrate quality (decomposability). We conducted a field experiment including control, urea, and four compost treatments. Ra and Rh were separated using the root exclusion method. Composts were characterized by chemical analyses, 13C solid‐state nuclear magnetic resonance, and lignin monomers. Annual cumulative Ra, along with root biomass, increased with soil mineral N, while Rh was suppressed by excessive N supply. Thus, Ra was stimulated but Rh was decreased by urea alone application. Annual Rh was increased by application of compost, especially that containing most lignin vanillyl and syringyl units, O‐alkyl C, di‐O‐alkyl C, and manganese. However, during the initial period, Rh was most effectively stimulated by the compost containing most carbohydrates, lignin cinnamyl units, phenolic C, and calcium. Ra was mediated by N release from compost decomposition and thus exhibited similar responses to compost quality as Rh. The Rh Q10 was reduced, while Ra Q10was increased by chemical fertilizer and compost application. Moreover, the Rh Q10 negatively related to soil mineral N supply and compost indicators referring to high substrate quality. Overall, our results suggest that N supply and substrate quality played an important role in regulating soil C flux and its response to climate warming.

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“…where ST is the soil temperature, Rs is the soil respiration rate at the given soil temperature, and a and b are fitted parameters. Then, the temperature sensitivity (Q10) values were calculated by inserting the parameter b [37]:…”

Section: Resultsmentioning

confidence: 99%

Litter Management as a Key Factor Relieves Soil Respiration Decay in an Urban-Adjacent Camphor Forest under a Short-Term Nitrogen Increment

Zhang

Chen

et al. 2020

Forests

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Increases in bioavailable nitrogen (N) level can impact the soil carbon (C) sequestration in many forest ecosystems through its influences on litter decomposition and soil respiration (Rs). This study aims to detect whether the litter management can affect the influence of N addition on Rs. We conducted a one-year field experiment in a camphor forest of central-south China to investigate the responses of available N status and soil Rs to N addition and litter manipulation. Four N addition plots (NH 4 NO 3 ; 0, 5, 15, 30 g N m −2 year −1 as N0, N1, N2, N3, respectively) were established with three nested litter treatments: natural litter input (CK), double litter input (LA), and non-litter input (LR). We found a short-lived enhancement effect of N addition on soil (NO 3 -N) and net nitrification (R N ), but not on (NH 4 -N), net ammonification (R A ), or mineralization (R M ). N addition also decreased Rs in CK spots, but not in LA or LR spots, in which the negative effects of N additions on Rs were alleviated by either litter addition or reduction. A priming effect was also observed in LA treatments. A structural equation modeling analysis showed that litter treatments had direct positive effects on soil available N contents and Rs, which suggested that litter decomposition may benefit from litter management when N is not a limiting factor in subtropical forests.

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The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes

Cited by 167 publications

References 71 publications

Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms

Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms

Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Litter Management as a Key Factor Relieves Soil Respiration Decay in an Urban-Adjacent Camphor Forest under a Short-Term Nitrogen Increment

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