Variation of δ13C and soil organic carbon under different precipitation gradients in alpine grassland on the Qinghai–Tibetan Plateau

Zhao, Yunfei; Wang, Xia; Li, Jia; Xiao, Jinjin; Hao, Zhiguo; Wang, KaiChang; Jiang, Silong; Zhou, Xiaolong; Liu, HuiYing

doi:10.1007/s11368-022-03223-x

Cited by 6 publications

(2 citation statements)

References 55 publications

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“…In our study, δ 13 C increased along litter-topsoil-subsoil, which was consistent with previous studies [37,38]. Soil δ 13 C values were similar in the four vegetation types, although their litter δ 13 C differences were large (Figure 5).…”

Section: Stable Isotope Patternssupporting

confidence: 92%

Vegetation Types Can Affect Soil Organic Carbon and δ13C by Influencing Plant Inputs in Topsoil and Microbial Residue Carbon Composition in Subsoil

Sun,

Wang,

Zhang

et al. 2024

Sustainability

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Plantation is an economical and effective method of ecological restoration, which is also a common means to increase soil organic carbon (SOC) content. However, the effects of vegetation types on SOC accumulation and δ13C distribution during ecological restoration are still not clear. Therefore, we evaluated the soils under four types of restoration measures: plantation (PL, dominated by Olea europaea ‘Leccino’), grasslands [GLs, Setaria viridis], croplands [CLs, Zea mays] and shrublands (SLs, Lycium chinense Mill), after 11-year restoration. SOC and the natural stable carbon isotope abundance in four recovery modes were determined, while amino sugars (ASs) and lignin phenols (LPs) were used as biomarkers to identify microbial- and plant-derived carbon, respectively. The results showed that SOC, AS, and LP decreased with the increasing of soil depth, and SOC and LP showed the same trend in topsoil (0–20 cm). ASs in subsoil (40–50 cm) were significantly higher in GLs than that in CLs and the PL, while fungi residue carbon in GLs was significantly higher in subsoil. The δ13C in topsoil was mainly affected by plant factors, especially by litter. With the increasing soil depth, the effect of plants on δ13C decreased, and the effect of microorganisms increased. Vegetation types could affect SOC and δ13C by influencing plant inputs in topsoil. In the subsoil, differences in microbial compositions under different vegetation types could affect δ13C enrichment. The study revealed the effects of vegetation types on SOC accumulation and δ13C distribution during ecological restoration, emphasized that vegetation types can affect SOC accumulation by influencing the plant input of topsoil and the microbial compositions in subsoil, and provided a reference for the development of management policies in restoration areas.

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Section: Stable Isotope Patternssupporting

confidence: 92%

Vegetation Types Can Affect Soil Organic Carbon and δ13C by Influencing Plant Inputs in Topsoil and Microbial Residue Carbon Composition in Subsoil

Sun,

Wang,

Zhang

et al. 2024

Sustainability

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“…As a result, smaller amounts of unstable organic carbon groups usually remain in the soil (González‐Rosado et al., 2020). Therefore, the significantly higher SOC accumulation in the shrub patches than in the herb patches may be related to the lower content of unstable groups in the soil (Xiao et al., 2023). The relative abundance of the Proteobacteria increased significantly from mobile to fixed.…”

Section: Discussionmentioning

confidence: 99%

Changes in soil bacterial community characteristics in patches of different vegetation types under different stages of restoration in the desert of northern China

Li,

Liang,

Meng

et al. 2024

Ecology and Evolution

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In desert areas, the process of mobile sandy land changing to semi‐fixed sandy land and eventually to fixed sandy land after undergoing vegetation restoration is inevitable. The presence of shrub patches and herb patches is common in this restoration process. No relevant studies have reported the soil bacterial community characteristics of different vegetation‐type patches (shrub patches and herb patches) under different stages of restoration. Therefore, we utilized long‐established experimental plots to collect soil from 0–20 cm soil layer under shrub patches (dominated by Salix psammophila) and herb patches under different stages of restoration (i.e., mobile sand land, semi‐fixed sand land, and fixed sand land), by determining soil physicochemical properties, enzyme activities, and soil bacterial communities. Our results found that soil bacterial α‐diversity under different restoration stages showed higher shrub patches than herb patches. The dominant bacterial communities (phyla) in shrub patches and herb patches at different recovery stages were Actinobacteria, Proteobacteria, and Bacteroidota. When the mobile sandy land returned to fixed sandy land, the relative abundance of Actinobacteria and Bacteroidota gradually decreased under shrub patches and herb patches, while the relative abundance of Proteobacteria increased significantly. In addition, herb patches significantly increased the relative abundance of bacteria (genus) relative to shrub patches at different stages of recovery. Soil nutrients, soil fine particles, and soil enzyme activities were significantly higher under shrub patches than under herb patches when fixed sandy land due to differences in life form and architecture between shrub patches and herb patches. Based on this, soil bacterial community composition and diversity under shrub patches were driven by more soil properties during the restoration of sandy land. This study complements the dynamic recovery processes and driving mechanisms of soil bacterial community structure under different vegetation patches in sandy areas, especially in the context of global climate change.

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Multidimensional effects of arable soil organic carbon distribution: a comparison among terrains

Tan,

Fang,

Lin

et al. 2024

J Soils Sediments

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Variation of δ13C and soil organic carbon under different precipitation gradients in alpine grassland on the Qinghai–Tibetan Plateau

Cited by 6 publications

References 55 publications

Vegetation Types Can Affect Soil Organic Carbon and δ13C by Influencing Plant Inputs in Topsoil and Microbial Residue Carbon Composition in Subsoil

Vegetation Types Can Affect Soil Organic Carbon and δ13C by Influencing Plant Inputs in Topsoil and Microbial Residue Carbon Composition in Subsoil

Changes in soil bacterial community characteristics in patches of different vegetation types under different stages of restoration in the desert of northern China

Multidimensional effects of arable soil organic carbon distribution: a comparison among terrains

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