The temperature responses of soil respiration in deserts: a seven desert synthesis

Cable, Jessica M.; Ogle, Kiona; Lucas, Richard W.; Huxman, Travis E.; Loik, Michael E.; Smith, Stanley D.; Tissue, David T.; Ewers, B. E.; Pendall, Elise; Welker, Jeffrey M.; Charlet, Therese N.; Cleary, Meagan B.; Griffith, Alden B.; Nowak, Robert S.; Rogers, Matthew; Steltzer, Heidi; Sullivan, Patrick F.; Gestel, Natasja C. van

doi:10.1007/s10533-010-9448-z

Cited by 109 publications

(108 citation statements)

References 74 publications

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“…For instance, soil respiration rate of TE was found to be comparable to those reported in similar ecosystems [7] [19] [20] [31], while the soil respiration in FE was parallel with the results of Zhang, et al [32] and Bai, et al [33]. Even in DE, soil respiration also had a similar order of magnitude with the data from the review of Raich and Schlesinger [6] and Cable, et al [34] [35]. Although flow-through non-steady-state (FS-NSS) IRGA method are widely used to continuously measure soil respiration rate nowadays, simultaneous measurements of a large number of replicates still require this traditional soda lime absorption method be applied.…”

Section: Soil Respiration and Environmental Factorssupporting

confidence: 83%

Spatial Variations of Soil Respiration in Arid Ecosystems

Liu¹,

Sonobe²,

Wang³

2016

OJE

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Soil respiration releases a major carbon flux back to atmosphere and thus plays an important role in global carbon cycling. Soil respiration is well known for its significant spatial variation in terrestrial ecosystems, especially in fragile ecosystems of arid land, where vegetation is distributed sparsely and the climate changes dramatically. In this study, soil respiration in three typical arid ecosystems: desert ecosystem (DE), desert-farmland transition ecosystem (TE) and farmland ecosystem (FE) in an arid area of northwestern China were studied for their spatial variations in 2012 and 2013. Along with soil respiration (SR), soil surface temperature (ST), soil moisture (SM) and soil electrical conductivity (ECb) were also recorded to investigate the spatial variations and the correlations among them. The results revealed that averaged soil respiration rate was much lower in DE than those in TE and FE. No single factor could adequately explain the variation of soil respiration, except a negative relationship between soil temperature and soil respiration in FE (P < 0.05). Geostatistical analysis showed that the spatial heterogeneity of soil respiration in DE was insignificant but notably in both TE and FE, especially in FE, which was mainly attributed to the different vegetation or soil moisture characteristics in the three ecosystems. The results obtained in this study will help to provide a better understanding on spatial variations of soil respiration and soil properties in arid ecosystems and also on macroscale carbon cycling evaluations.

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Section: Soil Respiration and Environmental Factorssupporting

confidence: 83%

Spatial Variations of Soil Respiration in Arid Ecosystems

Liu¹,

Sonobe²,

Wang³

2016

OJE

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“…In a global synthesis by Zhou et al (2009), it was reported for the diverse biomes a range of 1.43-2.03 for Q 10 , with the desert having the lowest Q 10 values. The low Q 10 values of desert shrub ecosystems result from their low amount of soil organic matter, small microbial community, and dry soil conditions (Conant et al, 2004;Gershenson et al, 2009;Cable et al, 2011).…”

Section: The Response Of Q 10 To Volumetric Water Contentmentioning

confidence: 99%

“…Carbon cycling in deserts may be particularly vulnerable to climate and land-use changes (Feng et al, 2001;Wang et al, 2004). The carbon dynamics of desert ecosystems and their response to environmental factors are critical knowledge gaps in the global carbon budget (Cable et al, 2011). In addition to soil temperature (Ts), also volumetric soil water content (VWC) is of primary importance for predicting the evolution of soil carbon stock and fluxes.…”

Section: Introductionmentioning

confidence: 99%

Soil moisture modifies the response of soil respiration to temperature in a desert shrub ecosystem

et al. 2014

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Abstract.The current understanding of the responses of soil respiration (Rs) to soil temperature (Ts) and soil moisture is limited for desert ecosystems. Soil CO 2 efflux from a desert shrub ecosystem was measured continuously with automated chambers in Ningxia, northwest China, from June to October 2012. The diurnal responses of Rs to Ts were affected by soil moisture. The diel variation in Rs was strongly related to Ts at 10 cm depth under moderate and high volumetric soil water content (VWC), unlike under low VWC. Ts typically lagged Rs by 3-4 h. However, the lag time varied in relation to VWC, showing increased lag times under low VWC. Over the seasonal cycle, daily mean Rs was correlated positively with Ts, if VWC was higher than 0.08 m 3 m −3 . Under lower VWC, it became decoupled from Ts. The annual temperature sensitivity of Rs (Q 10 ) was 1.5. The short-term sensitivity of Rs to Ts varied significantly over the seasonal cycle, and correlated negatively with Ts and positively with VWC. Our results highlight the biological causes of diel hysteresis between Rs and Ts, and that the response of Rs to soil moisture may result in negative feedback to climate warming in desert ecosystems. Thus, global carbon cycle models should account the interactive effects of Ts and VWC on Rs in desert ecosystems.

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“…However, the mean annual Q 10 in our sites (1.70) was lower than the global mean (2.47) Zhou et al, 2007;Gaumont-Guay et al, 2008;Zhu and Cheng, 2011;Zimmermann et al, 2012), probably due to low SOC contents, small 08-1-1 08-6-1 08-11-1 09-4-1 09-9-1 10-2-1 10-7-1 10-12-1 11-5-1 11-10-1 12-3-1 12-8-1 13-1-1 13-6-1 13-11-1 SOC mineralization rate (μ mol m microbial communities, dry soil conditions in semi-arid regions (Conant et al, 2004;Gershenson et al, 2009;Cable et al, 2011), and different methods used for separating the SOC mineralization rate Zhu and Cheng, 2011;Zimmermann et al, 2012).…”

Section: Soil Moisture Influenced the Interannual Variation In Q 10mentioning

confidence: 99%

“…Soil moisture is the most significant limiting factor for underground physiological processes in dry and semi-dry ecosystems (Balogh et al, 2011;Cable et al, 2011;Wang et al, 2014). Soil water availability may indirectly affect Q 10 by influencing the diffusion of substrates because the diffusion of extracellular enzymes produced by microorganisms and available substrates must occur in the liquid phase (Davidson et al, 1998;Illeris et al, 2004), but the response of Q 10 to soil water availability is extremely complex and controversial (Davidson et al, 2000;McCulley et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Soil moisture influence on the interannual variation in temperature sensitivity of soil organic carbon mineralization in the Loess Plateau

et al. 2015

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Abstract. Temperature sensitivity of soil organic carbon (SOC) mineralization (i.e., Q 10 ) determines how strong the feedback from global warming may be on the atmospheric CO 2 concentration; thus, understanding the factors influencing the interannual variation in Q 10 is important for accurately estimating local soil carbon cycle. In situ SOC mineralization rate was measured using an automated CO 2 flux system (Li-8100) in long-term bare fallow soil in the Loess Plateau (35 • 12 N, 107 • 40 E) in Changwu, Shaanxi, China from 2008 to 2013. The results showed that the annual cumulative SOC mineralization ranged from 226 to 298 g C m −2 yr −1 , with a mean of 253 g C m −2 yr −1 and a coefficient of variation (CV) of 13 %, annual Q 10 ranged from 1.48 to 1.94, with a mean of 1.70 and a CV of 10 %, and annual soil moisture content ranged from 38.6 to 50.7 % soil water-filled pore space (WFPS), with a mean of 43.8 % WFPS and a CV of 11 %, which were mainly affected by the frequency and distribution of precipitation. Annual Q 10 showed a quadratic correlation with annual mean soil moisture content. In conclusion, understanding of the relationships between interannual variation in Q 10 , soil moisture, and precipitation are important to accurately estimate the local carbon cycle, especially under the changing climate.

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The temperature responses of soil respiration in deserts: a seven desert synthesis

Cited by 109 publications

References 74 publications

Spatial Variations of Soil Respiration in Arid Ecosystems

Spatial Variations of Soil Respiration in Arid Ecosystems

Soil moisture modifies the response of soil respiration to temperature in a desert shrub ecosystem

Soil moisture influence on the interannual variation in temperature sensitivity of soil organic carbon mineralization in the Loess Plateau

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