Nutrients available in the soil regulate the changes of soil microbial community alongside degradation of alpine meadows in the northeast of the Qinghai-Tibet Plateau

Li, Haiyun; Qiu, Yizhi; Tuo, Yao; Han, Dongrong; Yamin, Gao; Zhang, Jiangui; Ma, Yachun; Zhang, Huirong; Yang, Xiaolei

doi:10.1016/j.scitotenv.2021.148363

Cited by 83 publications

(50 citation statements)

References 82 publications

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“…Numerous studies have reported that the structure of the bacterial community is influenced by the planting years of woody plants [ 5 , 19 ]. Among the teak plantations, the dominant phyla in the bacterial communities were Actinobacteria, Proteobacteria, and Acidobacteria, regardless of whether rhizosphere or bulk soil samples were scrutinized ( Figure 2 , Table S2 ), which was similar to the results of previous studies [ 55 ]. Earlier studies reported that soil microbes can change the composition and structure of corresponding microbial communities to adapt to the shift in environmental conditions during succession [ 10 , 56 ].…”

Section: Discussionsupporting

confidence: 83%

“…However, our research showed that the topological properties of the network, such as nodes, edges, and average degree, first increased and then declined, indicating that the complexity and stability of the network decreased in the later stages of succession. The diversity and complexity of microbial communities are closely correlated with ecosystem functions and services [ 55 ]. Therefore, maintaining a higher diversity and complexity of the bacterial communities may be critical for ecosystem productivity.…”

Section: Discussionmentioning

confidence: 99%

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Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Kunnan

Huang

et al. 2021

Biology

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Soil bacterial communities play crucial roles in ecosystem functions and biogeochemical cycles of fundamental elements and are sensitive to environmental changes. However, the response of soil bacterial communities to chronosequence in tropical ecosystems is still poorly understood. This study characterized the structures and co-occurrence patterns of soil bacterial communities in rhizosphere and bulk soils along a chronosequence of teak plantations and adjacent native grassland as control. Stand ages significantly shifted the structure of soil bacterial communities but had no significant impact on bacterial community diversity. Bacterial community diversity in bulk soils was significantly higher than that in rhizosphere soils. The number of nodes and edges in the bacterial co-occurrence network first increased and then decreased with the chronosequence. The number of strongly positive correlations per network was much higher than negative correlations. Available potassium, total potassium, and available phosphorus were significant factors influencing the structure of the bacterial community in bulk soils. In contrast, urease, total potassium, pH, and total phosphorus were significant factors affecting the structure of the bacterial community in the rhizosphere soils. These results indicate that available nutrients in the soil are the main drivers regulating soil bacterial community variation along a teak plantation chronosequence.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Kunnan

Huang

et al. 2021

Biology

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“…Species composition changes, a decline in diversity, and biomass decrease always accompany soil degradation [4,7]. Reduced vegetation coverage resulted in increasing availability of light [8], which decreases soil moisture and causes a ripple effect, such as increases in soil pH and bulk density [9,10], organic carbon and total nitrogen loss [1,11]. Soil microorganisms facilitate the release of nutrients, decomposition of organic matter, and participation in the cycle of carbon and nitrogen [12].…”

Section: Introductionmentioning

confidence: 99%

“…Soil microorganisms facilitate the release of nutrients, decomposition of organic matter, and participation in the cycle of carbon and nitrogen [12]. Their short life cycle produces extraordinary sensitivity to the microenvironment, which results in their terrific response to environmental stress and ecological change, especially in the alpine meadow [9,13]. Previous studies have proven that microbial community composition changes accompany soil degradation or degraded patch formation [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…The extremely degraded alpine meadows, known as "black beach" are always transformed into artificial grassland to improve grass productivity and relieve the grazing pressure on the natural meadow [22,23]. However, as a significant improvement for alpine meadow degradation artificial cultivation was always neglected in previous studies [6,9]. This is not conducive to fully and accurately understanding the changing rules of soil factors in the degradation and cultivation of alpine meadow.…”

Section: Introductionmentioning

confidence: 99%

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Variations and Mutual Relations of Vegetation–Soil–Microbes of Alpine Meadow in the Qinghai-Tibet Plateau under Degradation and Cultivation

Zhang

Ding

Zhang

et al. 2022

Land

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Artificial cultivation had been applied to recover the meadow suffering from serious degradation in the Qinghai–Tibet Plateau. Studies focusing only on the changes in vegetation, soil and microbes along the meadow degradation were insufficient, and artificial cultivation as an important part of succession was always neglected. Here, the variables of vegetation, soil, and soil bacteria are surveyed in four types of alpine meadow in the protected lands of the Qinghai–Tibet Plateau: intact alpine meadow (IAM), moderate degradation alpine meadow (MDAM), extreme degradation alpine meadow (black soil beach (BSB)), and artificial alpine grassland (AAG). The results indicated that degradation and cultivation significantly changed the characteristics of the vegetation community, physicochemical features of the soil, and soil bacterial community diversity. Soil bacteria took a considerably longer time to adapt to degradation and cultivation than vegetation and soil. Compared to IAM and BSB, ADAM and AAG had more specific bacteria identified by ANOVA and LEfSe analysis, implying an unstable state. Combined with vegetation and soil variables, it was speculated that the unstable AAG was not significantly improved from the degraded meadow, and also lagged significantly compared to IAM. Correlation analysis revealed that aboveground biomass, species richness, vegetation coverage, SOC, C/N, BD, WC, and pH were significantly associated with bacterial diversity under community level. Aboveground biomass was an effective indicator for soil bacterial gene copies. Redundancy analysis demonstrated that the soil bacterial community is mainly regulated by the vegetation coverage, Gleason index, Simpson index, TN, TP, and pH under phylum and genus level. Partial mantel test analysis indicated that the physicochemical features of the soil were the most important factor correlating with the soil bacterial community along the degradation and cultivation, compared to other environmental factors.

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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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Nutrients available in the soil regulate the changes of soil microbial community alongside degradation of alpine meadows in the northeast of the Qinghai-Tibet Plateau

Cited by 83 publications

References 82 publications

Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Variations and Mutual Relations of Vegetation–Soil–Microbes of Alpine Meadow in the Qinghai-Tibet Plateau under Degradation and Cultivation

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

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