The responses of soil respiration to changed precipitation and increased temperature in desert grassland in northern China

Zhang, Yi; Xie, Yi; Ma, Hao; Zhang, Juan; Jing, Le; Wang, Yutao; Li, Jianping

doi:10.1016/j.jaridenv.2021.104579

Cited by 12 publications

(3 citation statements)

References 15 publications

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“…5a), indicating a higher magnitude of increase in the rates of RS+L and RS than those observed under increased precipitation treatment. Previous studies have demonstrated that low precipitation can reduce the accumulation of soil moisture and the leaching of soil nutrients (Liu et al, 2009;Zhang et al, 2019c;Zhang et al, 2021). These findings demonstrated the substantial effects of the decrease in precipitation on increasing soil nutrients and the contents of soil microorganisms (Fig.…”

Section: Effects Of Changes In Precipitation and N Addition On Soil R...mentioning

confidence: 55%

Response of soil respiration to short-term changes in precipitation and nitrogen addition in a desert steppe

Ma,

Pang,

et al. 2023

J. Arid Land

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Changes in precipitation and nitrogen (N) addition may significantly affect the processes of soil carbon (C) cycle in terrestrial ecosystems, such as soil respiration. However, relatively few studies have investigated the effects of changes in precipitation and N addition on soil respiration in the upper soil layer in desert steppes. In this study, we conducted a control experiment that involved a field simulation from July 2020 to December 2021 in a desert steppe in Yanchi County, China. Specifically, we measured soil parameters including soil temperature, soil moisture, total nitrogen (TN), soil organic carbon (SOC), soil microbial biomass carbon (SMBC), soil microbial biomass nitrogen (SMBN), and contents of soil microorganisms including bacteria, fungi, actinomyces, and protozoa, and determined the components of soil respiration including soil respiration with litter (RS+L), soil respiration without litter (RS), and litter respiration (RL) under short-term changes in precipitation (control, increased precipitation by 30%, and decreased precipitation by 30%) and N addition (0.0 and 10.0 g/(m 2 a)) treatments. Our results indicated that short-term changes in precipitation and N addition had substantial positive effects on the contents of TN, SOC, and SMBC, as well as the contents of soil actinomyces and protozoa. In addition, N addition significantly enhanced the rates of RS+L and RS by 4.8% and 8.0% (P<0.05), respectively. The increase in precipitation markedly increased the rates of RS+L and RS by 2.3% (P<0.05) and 5.7% (P<0.001), respectively. The decrease in precipitation significantly increased the rates of RS+L and RS by 12.9% (P<0.05) and 23.4% (P<0.001), respectively. In contrast, short-term changes in precipitation and N addition had no significant effects on RL rate (P>0.05). The mean RL/RS+L value observed under all treatments was 27.63%, which suggested that RL is an important component of soil respiration in the desert steppe ecosystems. The results also showed that short-term changes in precipitation and N addition had significant interactive effects on the rates of RS+L, RS, and RL (P<0.001). In addition, soil temperature was the most important abiotic factor that affected the rates of RS+L, RS, and RL. Results of the correlation analysis demonstrated that the rates of RS+L, RS, and RL were closely related to soil temperature, soil moisture, TN, SOC, and the contents of soil microorganisms, and the structural equation model revealed that SOC and SMBC are the key factors influencing the rates of RS+L, RS, and RL. This study provides further insights into the characteristics of soil C emissions in desert steppe ecosystems in the context of climate change, which can be used as a reference for future related studies.

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Section: Effects Of Changes In Precipitation and N Addition On Soil R...mentioning

confidence: 55%

Response of soil respiration to short-term changes in precipitation and nitrogen addition in a desert steppe

Ma,

Pang,

et al. 2023

J. Arid Land

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“…Following prolonged droughts in arid regions, rainfall accelerates soil carbon mineralization, affecting microbial activity and the community structure. The result is a rapid increase in soil respiration [51][52][53][54][55]. However, in temperate and subtropical forests with optimal soil moisture conditions, rainfall can significantly decrease soil respiration rates [56,57].…”

Section: Discussionmentioning

confidence: 99%

Characteristics, Sources, and Mechanisms of Soil Respiration under Simulated Rainfall in a Native Karst Forest in Southwestern China

Lv,

Liu,

Ding

2024

Forests

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Rainfall significantly affects soil respiration rates by altering microbial activity and organic matter decomposition. In karst regions, it also impacts carbonate dissolution and precipitation, further influencing soil CO2 flux. Investigating the mechanism of rainfall’s impact on soil respiration is essential for accurately evaluating and predicting changes in terrestrial ecosystems. However, our understanding of the interaction between rainfall and soil respiration in the extensive karst ecosystems of southwestern China remains limited. This study conducted field-based simulated rainfall experiments to examine variations in soil respiration rates and elucidate the associated control mechanisms through stable carbon isotope composition analysis. Simulated rainfall significantly increased the CO2 release via soil respiration. We observed significant differences in the δ13C value of soil-respired CO2 before and after simulated rainfall. Following the rain, the δ13C of soil-respired CO2 was enriched compared to that before the rain. Through isotope data analysis, we found that the increased soil CO2 emissions were primarily driven by heterotrophic respiration, likely stimulated via changes in soil moisture, affecting microbial growth conditions. Furthermore, the variation in soil moisture affected carbonate dissolution and precipitation, potentially increasing the soil CO2 release after rainfall. In conclusion, these findings expand our understanding of rainfall’s effects on soil respiration in the native karst forests of southwestern China, contributing to the prediction of carbon cycling processes in such ecosystems. The data from this study have significant implications for addressing the release of greenhouse gases in efforts to combat climate change.

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“…Regarding this, respiratory activity is influenced by biotic and abiotic factors. The latter mainly includes soil moisture [51], because soil microorganisms are capable of responding quickly to changes in the humidity, generating rapid responses in respiration [52]. Regarding the correlation of RA with NI and NH 4 + , it has been reported that the incorporation of N can affect soil processes, including its respiratory activity, since the latter is stimulated by the presence of said element and also turns out to be extremely sensitive to changes that may occur in the soil; therefore, the N content may have an impact on respiratory activity [52][53][54].…”

Section: Discussionmentioning

confidence: 99%

Soil Quality Assessment in Response to Water Erosion and Mining Activity

et al. 2023

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Erosion significantly decreases the depth of a soil, the nutrients available for plants, the organic matter and, consequently, the productivity of the edaphic environment. Due to the above considerations, the objective of this study was to evaluate, through various properties, the quality of two eroded soils, one eroded by water and the other by mining activity, amended with biosolids. The quality for both soils was estimated through the selection of a minimum set of data by means of principal component analysis (PCA) and the subsequent realization of correlations, multiple regressions and finally calculations of normalized values (Vn) of those properties considered as indicators of soil quality. According to the results, inorganic nitrogen (NI) and respiratory activity (RA) were the properties selected as indicators to assess quality. For soil eroded by water and by mining activity, NI presented a low and very low quality, respectively (class 4 and 5 of quality according to the calculation of Vn). The quality of RA in soil eroded by mining extraction was very high (quality class 1 according to Vn), and thus it can be considered an ideal indicator for the evaluation of soil quality due to its sensitivity to anthropogenic changes (mining) in soil.

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The responses of soil respiration to changed precipitation and increased temperature in desert grassland in northern China

Cited by 12 publications

References 15 publications

Response of soil respiration to short-term changes in precipitation and nitrogen addition in a desert steppe

Response of soil respiration to short-term changes in precipitation and nitrogen addition in a desert steppe

Characteristics, Sources, and Mechanisms of Soil Respiration under Simulated Rainfall in a Native Karst Forest in Southwestern China

Soil Quality Assessment in Response to Water Erosion and Mining Activity

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