Temperature sensitivity of soil respiration is affected by prevailing climatic conditions and soil organic carbon content: A trans-China based case study

Zheng, Zhoutao; Yu, Guirui; Fu, Yuzhen; Wang, Yuesi; Sun, Xiaomin; Wang, Yinghong

doi:10.1016/j.soilbio.2009.04.013

Cited by 173 publications

(129 citation statements)

References 46 publications

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“…Our results showed that decomposition of old SOM (C3) increased considerably as temperature rose; each 10°C increase saw CO 2 emissions from C3 sources increase by ∼286 % (Q 10 = 2.86). Although relatively high, this figure is in line with many other arable systems [70,71] and research suggests that site-specific values are more closely linked to plant phenology and climatic conditions than to land use and management practices [72,73]. Interestingly, the C3-derived respiration rates were similar in both control and bare plots.…”

Section: Temperature Sensitivity Of Old Vs New Som Decompositionsupporting

confidence: 83%

Carbon Inputs from Miscanthus Displace Older Soil Organic Carbon Without Inducing Priming

et al. 2016

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The carbon (C) dynamics of a bioenergy system are key to correctly defining its viability as a sustainable alternative to conventional fossil fuel energy sources. Recent studies have quantified the greenhouse gas mitigation potential of these bioenergy crops, often concluding that C sequestration in soils plays a primary role in offsetting emissions through energy generation. Miscanthus is a particularly promising bioenergy crop and research has shown that soil C stocks can increase by more than 2 t C ha −1 yr −1 . In this study, we use a stable isotope ( 13 C) technique to trace the inputs and outputs from soils below a commercial Miscanthus plantation in Lincolnshire, UK, over the first 7 years of growth after conversion from a conventional arable crop. Results suggest that an unchanging total topsoil (0-30 cm) C stock is caused by Miscanthus additions displacing older soil organic matter. Further, using a comparison between bare soil plots (no new Miscanthus inputs) and undisturbed Miscanthus controls, soil respiration was seen to be unaffected through priming by fresh inputs or rhizosphere. The temperature sensitivity of old soil C was also seen to be very similar with and without the presence of live root biomass. Total soil respiration from control plots was dominated by Miscanthus-derived emissions with autotrophic respiration alone accounting for ∼50 % of CO 2 . Although total soil C stocks did not change significantly over time, the Miscanthus-derived soil C accumulated at a rate of 860 kg C ha −1 yr −1 over the top 30 cm. Ultimately, the results from this study indicate that soil C stocks below Miscanthus plantations do not necessarily increase during the first 7 years.

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Section: Temperature Sensitivity Of Old Vs New Som Decompositionsupporting

confidence: 83%

Carbon Inputs from Miscanthus Displace Older Soil Organic Carbon Without Inducing Priming

et al. 2016

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“…Increases in air temperature (top panel) caused consistent decreases in soil C densities across all regions of the US; such responses to temperature have been well characterised and attributed to more significant stimulation of heterotrophic respiration with increasing temperature (Wu et al, 2011;Rustad et al, 2001;Zheng et al, 2009;Reich and Schlesinger, 1992) compared to temperature-induced stimulation of NPP (Rustad et al, 2001). The average C loss predicted by our model for a temperature increase of 6 • C is estimated at 10 % and is similar to six models that predicted an average soil C decrease of 11 % when temperature was increased by 5 • C (Cramer et al, 2001).…”

Section: Sensitivity To Change In Air Temperaturementioning

confidence: 96%

“…It is well known that soil C is highly sensitive to climate change -including changes in temperature, precipitation and carbon dioxide (CO 2 ) concentrations (Zheng et al, 2009;Reich and Schlesinger, 1992;Jobbagy and Jackson, 2000;Treseder et al, 2003;Natali et al, 2008). Atmospheric CO 2 concentrations have been steadily increasing since 1850 and are now about 100 ppm higher than preindustrial levels (Wigley, 1983), with recent increases among the strongest observed in historic times (e.g., 0.9 Gt C yr −1 from 2000 to 2005 compared to 0.8 Gt C yr −1 from 1990 to 1999; IPCC, 2007).…”

Section: Introductionmentioning

confidence: 99%

Modelling the sensitivity of soil mercury storage to climate-induced changes in soil carbon pools

2013

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Substantial amounts of mercury (Hg) in the terrestrial environment reside in soils and are associated with soil organic carbon (C) pools, where they accumulated due to increased atmospheric deposition resulting from anthropogenic activities. The purpose of this study was to examine potential sensitivity of surface soil Hg pools to global change variables, particularly affected by predicted changes in soil C pools, in the contiguous US. To investigate, we included a soil Hg component in the Community Land Model based on empirical statistical relationships between soil Hg / C ratios and precipitation, latitude, and clay; and subsequently explored the sensitivity of soil C and soil Hg densities (i.e., areal-mass) to climate scenarios in which we altered annual precipitation, carbon dioxide (CO₂) concentrations and temperature.

Our model simulations showed that current sequestration of Hg in the contiguous US accounted for 15 230 metric tons of Hg in the top 0–40 cm of soils, or for over 300 000 metric tons when extrapolated globally. In the simulations, US soil Hg pools were most sensitive to changes in precipitation because of strong effects on soil C pools, plus a direct effect of precipitation on soil Hg / C ratios. Soil Hg pools were predicted to increase beyond present-day values following an increase in precipitation amounts and decrease following a reduction in precipitation. We found pronounced regional differences in sensitivity of soil Hg to precipitation, which were particularly high along high-precipitation areas along the West and East Coasts. Modelled increases in CO₂ concentrations to 700 ppm stimulated soil C and Hg accrual, while increased air temperatures had small negative effects on soil C and Hg densities. The combined effects of increased CO₂, increased temperature and increased or decreased precipitation were strongly governed by precipitation and CO₂ showing pronounced regional patterns. Based on these results, we conclude that the combination of precipitation and CO₂ should be emphasised when assessing how climate-induced changes in soil C may affect sequestration of Hg in soils

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“…In the boreal and temperate forests, soil warming can enhance the soil microbial activities and root growth sharply during the short summer (Zheng et al, 2009). This leads to an active decomposition of soil organic C and the enhancement of plant-derived CO 2 release from root respiration.…”

Section: Effects Of Soil Temperature and Moisture On Soil C Fluxesmentioning

confidence: 99%

“…This leads to an active decomposition of soil organic C and the enhancement of plant-derived CO 2 release from root respiration. However, the temperature limitation on root growth and soil microbial activities is low in tropical and subtropical forest ecosystems (Zheng et al, 2009). Besides, the labile pool of soil organic carbon (SOC) is an important substrate for soil respiration, and the composition of microbial community are linked to quantity/ quality of SOC (Gu et al, 2004;Knorr et al, 2005b;Fierer et al, 2005;Zheng et al, 2009).…”

Section: Effects Of Soil Temperature and Moisture On Soil C Fluxesmentioning

confidence: 99%

Effects of multiple environmental factors on CO<sub>2</sub> emission and CH<sub>4</sub> uptake from old-growth forest soils

Fang

Cheng

et al. 2010

Biogeosciences

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Abstract. To assess contribution of multiple environmental factors to carbon exchanges between the atmosphere and forest soils, four old-growth forests referred to as boreal coniferous forest, temperate needle-broadleaved mixed forest, subtropical evergreen broadleaved forest and tropical monsoon rain forest were selected along eastern China. In each old-growth forest, soil CO 2 and CH 4 fluxes were measured from 2003 to 2005 applying the static opaque chamber and gas chromatography technique. Soil temperature and moisture at the 10 cm depth were simultaneously measured with the greenhouse gas measurements. Inorganic N (NH + 4 -N and NO − 3 -N) in the 0-10 cm was determined monthly. From north to south, annual mean CO 2 emission ranged from 18.09 ± 0.22 to 35.40 ± 2.24 Mg CO 2 ha −1 yr −1 and annual mean CH 4 uptake ranged from 0.04 ± 0.11 to 5.15 ± 0.96 kg CH 4 ha −1 yr −1 in the four old-growth forests. Soil CO 2 flux in the old-growth forests was mainly driven by soil temperature, followed by soil moisture and NO

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Temperature sensitivity of soil respiration is affected by prevailing climatic conditions and soil organic carbon content: A trans-China based case study

Cited by 173 publications

References 46 publications

Carbon Inputs from Miscanthus Displace Older Soil Organic Carbon Without Inducing Priming

Carbon Inputs from Miscanthus Displace Older Soil Organic Carbon Without Inducing Priming

Modelling the sensitivity of soil mercury storage to climate-induced changes in soil carbon pools

Effects of multiple environmental factors on CO<sub>2</sub> emission and CH<sub>4</sub> uptake from old-growth forest soils

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Temperature sensitivity of soil respiration is affected by prevailing climatic conditions and soil organic carbon content: A trans-China based case study

Cited by 173 publications

References 46 publications

Carbon Inputs from Miscanthus Displace Older Soil Organic Carbon Without Inducing Priming

Carbon Inputs from Miscanthus Displace Older Soil Organic Carbon Without Inducing Priming

Modelling the sensitivity of soil mercury storage to climate-induced changes in soil carbon pools

Effects of multiple environmental factors on CO&lt;sub&gt;2&lt;/sub&gt; emission and CH&lt;sub&gt;4&lt;/sub&gt; uptake from old-growth forest soils

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Effects of multiple environmental factors on CO<sub>2</sub> emission and CH<sub>4</sub> uptake from old-growth forest soils