Temperature sensitivity of soil respiration in different ecosystems in China

Peng, Shushi; Piao, Shilong; Wang, Tao; Sun, Jinghua; Shen, Zehao

doi:10.1016/j.soilbio.2008.10.023

Cited by 238 publications

(154 citation statements)

References 36 publications

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“…Short-term Q 10 of SR and MR decreased with increasing soil temperature (Fig. 4), which was consistent with many previous studies (Kirschbaum 1995;Janssens and Pilegaard 2003;Curiel Yuste et al 2004;Chen and Tian 2005;Gaumont-Guay et al 2006;Peng et al 2009;Wang et al 2010). The reduction in Q 10 with increasing soil temperature may be explained by the changes of limitation for SR and MR, from acclimation of enzymatic activity at low temperatures to limitation by substrate supply at high temperatures (Reichstein et al 2005a;Gaumont-Guay et al 2006).…”

Section: The Seasonal Variation Of Short-term Apparent Q 10 Of Sr and Mrsupporting

confidence: 90%

Variation of Q₁₀values in a fenced and a grazed grassland on the loess plateau, northwestern China

Zhang

Xu-dong

Wen

et al. 2015

Soil Science and Plant Nutrition

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Soil respiration (SR) and microbial respiration (MR), which were primarily regulated by soil temperature, can act as a feedback to climate change. Although many studies suggest that global warming will accelerate carbon dioxide (CO 2 ) emissions from soil, the magnitude of this feedback is unknown, mostly due to uncertainty in the temperature sensitivity (Q 10 , increaing ratio of SR and MR after a 10°C increase of temperature) of SR and MR. To investigate the seasonal variation of short-term Q 10 and estimate how grazing impacts temperature sensitivity of SR and MR, we measured SR and MR in a fenced and a grazed grassland on the loess plateau, northwestern China, during 2008China, during -2010. In this semiarid grassland ecosystem, soil temperature was the dominant factor controlling SR and MR during the experimental period. Short-term apparent Q 10 of SR and MR had a clearly seasonal variation, and was significantly and negatively related to soil temperature at 2-cm depth. However, no relationship was found between soil moisture (0-10 cm soil layer) and apparent Q 10 . By decreasing soil organic carbon and root biomass, grazing reduced the long-term Q 10 of SR and MR. In both the short term and the long term, Q 10 of MR was lower than that of SR, suggesting that autotrophic respiration is more sensitive than heterotrophic respiration to temperature. We emphasize the importance of using Q 10 when modeling trajectories of soil carbon stocks under climate change scenarios, and the seasonal variation of Q 10 should also be regarded as a parameter in the global carbon models.

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Section: The Seasonal Variation Of Short-term Apparent Q 10 Of Sr and Mrsupporting

confidence: 90%

Variation of Q₁₀values in a fenced and a grazed grassland on the loess plateau, northwestern China

Zhang

Xu-dong

Wen

et al. 2015

Soil Science and Plant Nutrition

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“…This was in agreement with previous studies (Suseela et al, 2012;Poll et al, 2013). However, Q 10 was found to be negatively correlated with mean annual precipitation (P < 0.01) in different forest ecosystems in China, which could be due to the relatively abundant rainfall in the forest ecosystems (700-1956 mm) (Peng et al, 2009). Soil moisture was the major limiting factor for underground biological processes, especially in water-limited regions (Reth et al, 2005;Balogh et al, 2011;Wang et al, 2014).…”

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

confidence: 91%

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 respiration quotient reflects the sensitivity of soil CO 2 flux to temperature, and varies among ecosystems and across temperature ranges (Peng et al 2008). In this study, artificial warming did not affect the temperature sensitivity of soil respiration in both forest ecosystems.…”

Section: Discussionmentioning

confidence: 47%

Initial responses of soil CO2 efflux and C, N pools to experimental warming in two contrasting forest ecosystems, Eastern Tibetan Plateau, China

Wan

Xiong

et al. 2010

Plant Soil

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Alpine ecosystems are harsh environments where low temperatures are generally a limiting factor. Predicted global warming is thus expected to have a profound impact on alpine ecosystems in the future. This study was conducted to compare the effect of experimental warming on soils in two contrasting forest ecosystems (a dragon spruce plantation and a natural forest) using the open top chamber (OTC) method in the Eastern Tibetan Plateau of China. The OTC enhanced average daily mean soil temperatures by 0.61°C (plantation) and 0.55°C (natural forest), respectively, throughout the growing season. Conversely, soil volumetric moisture declined by 4.10% in the plantation and by 2.55% in the natural forest. Across all measuring dates, warming increased average soil CO 2 efflux by 10.6% in the plantation and by 15.4% in the natural forest. However, elevated temperatures did not affect the respiration quotient in either forest. Two-stage sulfuric acid hydrolysis was used to quantify labile and recalcitrant C and N fractions in the two contrasting soils. Warming significantly reduced labile C and N fractions in both ecosystems but did not influence the total, recalcitrant and microbial biomass C and N pools. Labile C, N and microbial biomass C showed significant interactions in warming × forest type × season. Irrespective of warming treatments, all measured pools were significantly larger in the natural forest compared to the plantation. Taken together, our results indicate that the lowered soil labile C and N pools may be induced by the increased soil CO 2 efflux. The responses of the natural forest soil were more sensitive to experimental warming than those of the plantation. We conclude that reforestation dramatically lowers soil C and N pools, further affecting the responses of forest soils to future global warming.

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Temperature sensitivity of soil respiration in different ecosystems in China

Cited by 238 publications

References 36 publications

Variation of Q₁₀values in a fenced and a grazed grassland on the loess plateau, northwestern China

Variation of Q₁₀values in a fenced and a grazed grassland on the loess plateau, northwestern China

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

Initial responses of soil CO2 efflux and C, N pools to experimental warming in two contrasting forest ecosystems, Eastern Tibetan Plateau, China

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Temperature sensitivity of soil respiration in different ecosystems in China

Cited by 238 publications

References 36 publications

Variation of Q10values in a fenced and a grazed grassland on the loess plateau, northwestern China

Variation of Q10values in a fenced and a grazed grassland on the loess plateau, northwestern China

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

Initial responses of soil CO2 efflux and C, N pools to experimental warming in two contrasting forest ecosystems, Eastern Tibetan Plateau, China

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Variation of Q₁₀values in a fenced and a grazed grassland on the loess plateau, northwestern China

Variation of Q₁₀values in a fenced and a grazed grassland on the loess plateau, northwestern China