Temperature Sensitivity (Q10) of Soil Basal Respiration as a Function of Available Carbon Substrate, Temperature, and Moisture

Gromova, M. S.; Matvienko, A. I.; Макаров, М. И.; Cheng, Chiung-Hsiang; Menyailo, O. V.

doi:10.1134/s1064229320020052

Cited by 11 publications

(4 citation statements)

References 28 publications

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“…Many studies believed that soil temperature were the main factors affecting soil respiration. It can explain seasonal changes in soil respiration [39,40]. In this study, the soil respiration and soil temperature of four reconstructed soils was exponentially correlated, which was consistent with the research conclusions of most scholars [41,42].…”

Section: The Relationship Between Soil Respiration and Hydrothermal Factorssupporting

confidence: 89%

Components of Soil Respiration and Its Temperature Sensitivity in Four Reconstructed Soils

Lei¹,

Wang²,

Chen³

2021

Preprint

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seasonal changes characteristics in the respiration of four reconstructed soils Abstract: seasonal changes characteristics in the respiration of four reconstructed soil masses 9 in a barren gravel land were monitored using soil carbon flux measurement system. The 10 results showed that (1) The seasonal changes in soil respiration and heterotrophic respiration 11 of four reconstructed soils of meteorite, shale, sand and soft rock were the same as the 12 seasonal change in soil temperature. Soil respiration and heterotrophic respiration increased 13 with soil temperature. It was gradually increasing, reaching the maximum in summer and 14 decreasing to the minimum in winter. Among the four reconstructed soils, the average annual 15 soil respiration of reconstructed soil with sand was 4.87 μmol•m –2 •s –1 , which was 16 significantly higher than the other reconstructed soils (p<0.05).(2) The autotrophic respiration 17 of four reconstructed soils showed obvious seasonal dynamic changes. The maximum and 18 minimum values appeared in August 2018 and January 2018, respectively. In the whole year, 19 The variation range of the annual average soil autotrophic respiration in the total respiration 20 of the reconstituted soil with addtion of meteorite, shale, sand and soft rock were 12.5-38.0%, 21 9.5-42.0%, 7.7-41.2%, and 5.0-39.3%, respectively.(3) Soil temperature was the main factor 22 affecting soil respiration. The four reconstructed respiration had a very significant correlation 23 with soil temperature (p<0.01). The relationship between reconstructed soils respiration and 24 soil temperature can be indexed function characterization. The 90% to 93% changes in soil 25 respiration of reconstructed soils were caused by soil temperature. The order of Q 10 in soils 26 respiration of four reconstructed was as follows: Sand> shale> soft rock > meteorite.

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Section: The Relationship Between Soil Respiration and Hydrothermal Factorssupporting

confidence: 89%

Components of Soil Respiration and Its Temperature Sensitivity in Four Reconstructed Soils

Lei¹,

Wang²,

Chen³

2021

Preprint

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“…Although water content and temperature have been established to be the main environmental factors influencing soil respiration in Chinese farmland ecosystems, this respiration and its components are characterized by differential responses to variations in temperature and water content 30 . The findings of numerous studies have indicated that soil temperature is the main factor influencing soil respiration, which is clearly reflected in the observed seasonal changes 31 , 32 . Consistent with the opinion of a majority of scholars 33 , 34 , we detected an exponential correlation between soil respiration and soil temperature among the four assessed reconstructed soils.…”

Section: Discussionmentioning

confidence: 99%

Components of respiration and their temperature sensitivity in four reconstructed soils

Lei

Wang

Zhang

et al. 2022

Sci Rep

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Seasonal changes characteristics in the respiration of four reconstructed soil masses in a barren gravel land were monitored. The results showed that (1) Respiration and heterotrophic respiration of the four reconstructed soils with added meteorite, shale, sand increased gradually with increasing soil temperatures, reaching its maximum in summer and decreasing to its minimum in winter. the average annual respiration of reconstructed soil with sand was 4.87 μmol·m–2·s–1, which was significantly higher than the other reconstructed soils (p < 0.05). (2) The maximum and minimum values of autotrophic respiration for the four reconstructed soils appeared in August 2018 and January 2018, respectively. the proportion of autotrophic respiration to total respiration was 12.5–38.0%, 9.5–42.0%, 7.7–41.2%, and 5.0–39.3% for the soils with reconstituted meteorite, shale, sand, and soft rock, respectively. (3) The relationship between respiration and the temperature of reconstructed soils can be represented by an exponential function. The 90% to 93% changes in reconstructed soils respiration were caused by soil temperature. The temperature sensitivity (Q10) of reconstituted soil with added sand was significantly higher than that of the other three reconstituted soils.

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“…The daily Q 10 was smaller than the monthly Q for the same site and time because of the exclusion of the influences of climate variations, such as rain, and; this better reflected the intrinsic temperature sensitivity of soil respiration (Tarkhov et al 2019). At a seasonal scale, Q 10 values not only indicate the immediate controlling effect of temperature on soil enzyme activities, but also long-term phenological control of changes in microbial communities and root growth dynamics (Gromova et al 2020). Because of the differences between long-term and short-term temperature sensitivities of soil respiration, attention must be given to scaling issues when calculating or using Q 10 values for estimating carbon budgets.…”

Section: Correlations Among R S Wvc and Near-surface Soil Temperatures (T 0cm T 5cm And T 10cm )mentioning

confidence: 94%

Seasonal variations in temperature sensitivity of soil respiration in a larch forest in the Northern Daxing’an Mountains in Northeast China

Yang

Zhang

et al. 2021

J. For. Res.

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Temperature sensitivity of respiration of forest soils is important for its responses to climate warming and for the accurate assessment of soil carbon budget. The sensitivity of temperature (Ti) to soil respiration rate (Rs), and Q10 defined by e10(lnRs−lna)/Ti has been used extensively for indicating the sensitivity of soil respiration. The soil respiration under a larch (Larix gmelinii) forest in the northern Daxing’an Mountains, Northeast China was observed in situ from April to September, 2019 using the dynamic chamber method. Air temperatures (Tair), soil surface temperatures (T0cm), soil temperatures at depths of 5 and 10 cm (T5cm and T10cm, respectively), and soil-surface water vapor concentrations were monitored at the same time. The results show a significant monthly variability in soil respiration rate in the growing season (April–September). The Q10 at the surface and at depths of 5 and 10 cm was estimated at 5.6, 6.3, and 7.2, respectively. The Q10@10 cm over the period of surface soil thawing (Q10@10 cm, thaw = 36.89) were significantly higher than that of the growing season (Q10@10 cm, growth = 3.82). Furthermore, the Rs in the early stage of near-surface soil thawing and in the middle of the growing season is more sensitive to changes in soil temperatures. Soil temperature is thus the dominant factor for season variations in soil respiration, but rainfall is the main controller for short-term fluctuations in respiration. Thus, the higher sensitivity of soil respiration to temperature (Q10) is found in the middle part of the growing season. The monthly and seasonal Q10 values better reflect the responsiveness of soil respiration to changes in hydrometeorology and ground freeze-thaw processes. This study may help assess the stability of the soil carbon pool and strength of carbon fluxes in the larch forested permafrost regions in the northern Daxing’an Mountains.

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Temperature Sensitivity (Q10) of Soil Basal Respiration as a Function of Available Carbon Substrate, Temperature, and Moisture

Cited by 11 publications

References 28 publications

Components of Soil Respiration and Its Temperature Sensitivity in Four Reconstructed Soils

Components of Soil Respiration and Its Temperature Sensitivity in Four Reconstructed Soils

Components of respiration and their temperature sensitivity in four reconstructed soils

Seasonal variations in temperature sensitivity of soil respiration in a larch forest in the Northern Daxing’an Mountains in Northeast China

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