Revegetation modifies patterns of temporal soil respiration responses to extreme-drying-and-rewetting in a semiarid ecosystem

Sun, Wenhao; Zhao, Xining; Li, Qiang; Li, Hongchen

doi:10.1007/s11104-018-3835-y

Cited by 11 publications

(9 citation statements)

References 72 publications

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“…SEM analyses showed that the driving factors for total soil respiration changed from both soil temperature and moisture in the C. korshinskii vegetation restoration area (Figure 4a, Figure S9) to soil temperature in the typical steppe (Figure 4b; Guan et al, 2022). These results indicated that vegetation restoration increased the role of soil moisture in regulating the dynamics of soil respiration (Sun et al, 2018, 2021). In addition, the combination of soil temperature and moisture explained more of the soil respiration in the typical steppe than in the C. korshinskii vegetation restoration area (Figure 3, Tables S3 and S4), suggesting that other factors, such as root growth, may regulate soil respiration in the C. korshinskii vegetation restoration area (Han & Zhu, 2020; Li, Liu, et al, 2021).…”

Section: Discussionmentioning

confidence: 93%

Microbial function regulates the effect of vegetation restoration on the contribution of biocrusts to soil respiration in drylands

et al. 2023

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Biocrusts are special components of dryland ecosystems and play important roles in ecosystem carbon cycles. Vegetation restoration not only affects carbon storage but also changes the characteristics of biocrusts. However, how vegetation restoration influences the contribution of biocrusts to soil carbon cycling in dryland ecosystems is poorly understood. Using continuous field measurements combined with metagenomic shotgun sequencing, we explored the effect and regulatory mechanisms of Caragana korshinskii vegetation restoration on the contribution of biocrusts to total soil respiration. We found that vegetation restoration increased the contribution of biocrusts to total soil respiration, with the biocrust contribution increasing from −5.6% for mixed biocrusts in a typical steppe to 17.1%, 18.1% and 19.6% for cyanobacteria–algae, lichen and moss biocrusts, respectively, in a Caragana korshinskii vegetation restoration area. The driving factors for total soil respiration changed from solely soil temperature to soil temperature and moisture after vegetation restoration. In contrast, the driving factors for soil respiration estimated for biocrust layers changed from precipitation alone to soil temperature and precipitation after vegetation restoration. We reveal that changes in microbial functional structure play important roles in regulating the effect of vegetation restoration and biocrusts on soil respiration. In addition, vegetation restoration also increases the microbial activity in biocrusted soils. This calls for an improved understanding of the effects of biocrusts on soil respiration under vegetation restoration scenarios to advance our ability to evaluate soil carbon releases from dryland ecosystems. Read the free Plain Language Summary for this article on the Journal blog.

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Section: Discussionmentioning

confidence: 93%

Microbial function regulates the effect of vegetation restoration on the contribution of biocrusts to soil respiration in drylands

et al. 2023

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“…Overall, the results indicated that precipitation regulates soil carbon flux by controlling soil moisture, since most of the studies found a strong positive linear correlation between soil respiration and soil water content in different land-use systems, indicating that higher soil moisture levels promote the biological processes responsible for carbon release (Sun et al 2018. However, type of land use influenced the intensity of soil carbon emissions, which appeared to be lower in agricultural systems than in abandoned grassland and shrubland (Sun et al 2021).…”

Section: Effect Of Drought Under Different Climate and Water Manageme...mentioning

confidence: 88%

“…Four research articles analyzed soil carbon emissions under different precipitation regimes (Lai et al 2016, one study evaluated both soil carbon sequestration and emissions under different soil moisture conditions (Singh et al 2021), one study assessed SOC under the effect of different irrigation inputs during a drought event in a semi-arid climate (Bhandari et al 2022), and one study evaluated the influence of soil type and soil water drainage capacity on soil carbon emissions under drought in a maritime climate (Ford et al 2021). Regarding the effects of precipitation, two studies evaluated the effects of drought on cropland and a jujube orchard, compared with abandoned grassland and shrubland, in a semi-arid continental climate (Sun et al 2018(Sun et al , 2021. One study assessed the effects of four simulated precipitation patterns, considering different precipitation amounts (300 and 600 mm) distributed in different sub-events (10 or 100 mm), in a sub-humid continental monsoon climate (Zhao et al 2021).…”

Section: Effect Of Drought Under Different Climate and Water Manageme...mentioning

confidence: 99%

“…The actual sequence of dry and wet periods and the duration/intensity of these periods also influenced soil carbon stocks. In one study, for example, in cropland under semi-arid conditions, a moderate rain event (6.2 mm h −1 ) following dry conditions (10 preceding days without rain) was found to induce around 12-fold higher soil carbon emissions than a moderate rain event (6.3 mm h −1 ) following wet conditions (one preceding day without rain) (Sun et al 2018). Zhao et al (2021) found that soil carbon emissions tended to be higher in a 30-day drought period than a 15-day drought period, which suggests that prolonged drought conditions may increase microbial growth recovery and enhance soil carbon mineralization.…”

Section: Effect Of Drought Under Different Climate and Water Manageme...mentioning

confidence: 99%

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Drought effects on soil organic carbon under different agricultural systems

Soares,

Harrison,

Kalantari

et al. 2023

Environ. Res. Commun.

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Drought is a natural hazard occurring with increasing frequency due to climate change. Drought events reduce soil water content and also soil organic carbon (SOC) content, with negative impacts on crop development and food security. This study investigates the impact of drought on SOC dynamics in agricultural systems and the influence of water availability and farm management practices in these impacts. The manuscript is a systematic review, based on Scopus database for scoping the literature on the topic. A total of 283 records were retrieved, but only 16 papers were relevant for the review. The main findings are: 1) water plays a key role in regulating SOC mineralization, necessitating further research on water management to mitigate carbon losses during drought; 2) different agricultural systems can have differing impacts on SOC under drought conditions (e.g., pastures are more resilient than arable systems); and 3) SOC loss generally occurs after a drought event, regardless of farm management regime. Best management practices, such as cover cropping and soil amendment, can minimize SOC losses, but further research is required to optimize these practices in counteracting the effect of drought. A better understanding of the effects of drought on SOC dynamics, and of short-term and long-term ways to mitigate these effects, is important to ensure soil health and crop productivity.

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“…2015, Xue and Tang 2017, Sun et al. 2018). This has been ascribed to a number of factors, including modifications in soil microclimate (Liu et al.…”

Section: Introductionmentioning

confidence: 99%

Topography modifies the effect of land‐use change on soil respiration: A meta‐analysis

et al. 2021

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Soil respiration is controlled by land‐use changes associated with cropland vegetation restoration, and this can vary with topography, although the magnitude of this effect and the underlying mechanisms are still unclear. We synthesized 69 recently published papers from China to explore the influence of topography‐related changes in land use on soil respiration where croplands were converted into orchards (abbreviated as C‐O), grasslands (abbreviated as C‐G), or woodlands (abbreviated as C‐W). Our results showed that not only did land‐use change have a significant influence on soil respiration, but this varied with topography. While C‐O resulted in a decrease in soil respiration by, on average, 3.1%, both the magnitude and sign of the change varied with topography, with an 8.2% increase for flat areas and a 14.7% decrease for slopes. For the C‐G conversions, soil respiration increased, on average, by 21.4%, with a 19.5% and a 24.3% increase for flat and slope topography, respectively. For C‐W, soil respiration increased, on average, by 28.0%, with only a 1.6% increase for flat areas, but a 39.9% increase for slopes. Soil temperature, soil moisture, root biomass, soil organic carbon (SOC), soil microbial biomass carbon (MBC), soil carbon‐to‐nitrogen ratio (C:N ratio), and soil density also varied with topography, with larger changes for slopes than for flat topography. Increases in soil respiration associated with different topography were closely related to changes in soil temperature, SOC, MBC, and root biomass (P < 0.05), but were not correlated with changes in soil moisture, C:N ratio, or soil density (P > 0.05). The contribution of different drivers to the change in soil respiration under different topographical conditions showed a trend of SOC > root biomass > MBC > soil temperature. Based on these results, topography‐related variations in soil respiration need to be accounted for when quantifying the impact of land‐use change in C budgets.

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Revegetation modifies patterns of temporal soil respiration responses to extreme-drying-and-rewetting in a semiarid ecosystem

Cited by 11 publications

References 72 publications

Microbial function regulates the effect of vegetation restoration on the contribution of biocrusts to soil respiration in drylands

Microbial function regulates the effect of vegetation restoration on the contribution of biocrusts to soil respiration in drylands

Drought effects on soil organic carbon under different agricultural systems

Topography modifies the effect of land‐use change on soil respiration: A meta‐analysis

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