Divergent responses of soil bacterial communities in erosion-deposition plots on the Loess Plateau

Geoderma ◽  
2020 ◽  
Vol 358 ◽  
pp. 113995 ◽  
Author(s):  
Lanlan Du ◽  
Rui Wang ◽  
Xin Gao ◽  
Yaxian Hu ◽  
Shengli Guo
Keyword(s):  
Loess Plateau ◽  
Bacterial Communities ◽  
The Loess Plateau ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Assembly mechanisms of soil bacterial communities in subalpine coniferous forests on the Loess Plateau, China

2019 ◽  
Vol 57 (6) ◽  
pp. 461-469
Author(s):  
Pengyu Zhao ◽  
Jinxian Liu ◽  
Tong Jia ◽  
Zhengming Luo ◽  
Cui Li ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Bacterial Communities ◽  
Coniferous Forests ◽  
The Loess Plateau ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

scholarly journals Erratum: Li, P.; Zhang, X.; et al. Effects of Vegetation Restoration on Soil Bacterial Communities, Enzyme Activities, and Nutrients of Reconstructed Soil in a Mining Area on the Loess Plateau, China. Sustainability 2019, 11, 2295

2019 ◽  
Vol 11 (19) ◽  
pp. 5171
Author(s):  
Li ◽  
Zhang ◽  
Hao ◽  
Cui ◽  
Zhu ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Enzyme Activities ◽  
Bacterial Communities ◽  
Mining Area ◽  
Vegetation Restoration ◽  
The Loess Plateau ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
Reconstructed Soil ◽  
Published Paper

The authors would like to make the following corrections about the published paper [1]. The changes are as follows: [...]

scholarly journals Soil Bacterial Community Response and Nitrogen Cycling Variations Associated with Subalpine Meadow Degradation on the Loess Plateau, China

2020 ◽  
Vol 86 (9) ◽  
Author(s):  
Zhengming Luo ◽  
Jinxian Liu ◽  
Tong Jia ◽  
Baofeng Chai ◽  
Tiehang Wu
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Loess Plateau ◽  
Bacterial Communities ◽  
N Cycling ◽  
The Loess Plateau ◽  
Soil Bacterial Communities ◽  
Subalpine Meadow ◽  
Soil Bacterial ◽  
Meadow Degradation

ABSTRACT Grassland degradation is an ecological problem worldwide. This study aimed to reveal the patterns of the variations in bacterial diversity and community structure and in nitrogen cycling functional genes along a subalpine meadow degradation gradient on the Loess Plateau, China. Meadow degradation had a significant effect on the beta diversity of soil bacterial communities (P < 0.05) but not on the alpha diversity (P > 0.05). Nonmetric multidimensional scaling (NMDS) and analysis of similarity (ANOSIM) indicated that the compositions of bacterial and plant communities changed remarkably with increasing meadow degradation (all P < 0.05). The beta diversities of the plant and soil bacterial communities were significantly correlated (P < 0.05), while their alpha diversities were weakly correlated (P > 0.05) along the meadow degradation gradient. Redundancy analysis (RDA) showed that the structure of the bacterial community was strongly correlated with total nitrogen (TN), nitrate nitrogen (NO3−-N), plant Shannon diversity, plant coverage, and soil bulk density (all P < 0.05). Moreover, the abundances of N fixation and denitrification genes of the bacterial community decreased along the degradation gradient, but the abundance of nitrification genes increased along the gradient. The structure of the set of N cycling genes present at each site was more sensitive to subalpine meadow degradation than the structure of the total bacterial community. Our findings revealed compositional shifts in the plant and bacterial communities and in the abundances of key N cycling genes as well as the potential drivers of these shifts under different degrees of subalpine meadow degradation. IMPORTANCE Soil microbes play a crucial role in the biogeochemical cycles of grassland ecosystems, yet information on how their community structure and functional characteristics change with subalpine meadow degradation is scarce. In this study, we evaluated the changes in bacterial community structure and nitrogen functional genes in degraded meadow soils. Meadow degradation had a significant effect on bacterial community composition. Soil total nitrogen was the best predictor of bacterial community structure. The beta diversities of the plant and soil bacterial communities were significantly correlated, while their alpha diversities were only weakly correlated. Meadow degradation decreased the potential for nitrogen fixation and denitrification but increased the potential for nitrification. These results have implications for the restoration and reconstruction of subalpine meadow ecosystem on the Loess Plateau.

scholarly journals Adaptive Development of Soil Bacterial Communities to Ecological Processes Caused by Mining Activities in the Loess Plateau, China

2020 ◽  
Vol 8 (4) ◽  
pp. 477 ◽  
Author(s):  
Zhanbin Luo ◽  
Jing Ma ◽  
Fu Chen ◽  
Xiaoxiao Li ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Bacterial Communities ◽  
Mining Subsidence ◽  
Mining Activities ◽  
The Loess Plateau ◽  
Ecological Processes ◽  
Soil Bacterial Communities ◽  
Subsidence Area ◽  
Adaptive Development ◽  
Soil Bacterial

Microorganisms are the driving force behind the circulation and transformation of the soil substance. The development of soil bacterial communities is critical for ecosystem restoration and evolution. In the Loess Plateau, coal mining activities have aggravated the deterioration of the fragile local ecological environment. The adaptive development of soil bacterial communities in response to different ecological processes caused by coal mining activities was explored through high-throughput sequencing technology and an ecological network analysis of the mining subsidence area of the Daliuta Coal Mine and vegetation rehabilitation area of the Heidaigou Coal Mine in the Loess Plateau. The results showed that while mining subsidence was inhibited, vegetation rehabilitation promoted the soil physicochemical properties. Soil organic matter, available phosphorus and available potassium in the subsidence area decreased significantly (P < 0.05), while soil organic matter, soil water, pH and EC in the vegetation rehabilitation area increased significantly (P < 0.05). The diversity index in the subsidence area decreased by about 20%, while that in the vegetation rehabilitation area increased by 63%. Mining subsidence and vegetation rehabilitation had a distinct influence on the molecular ecological networks of the soil bacteria, which tended to be more complex after the mining subsidence, and the number of connections in the network increased otherwise significantly enhanced interactive relationships. After the vegetation rehabilitation, the number of modules in the ecological network increased, but the contents of modules tended to be simpler. Soil bacterial communities adapted to the changes by changing the relationships between bacteria in response to different ecological processes. This study provides new insights into the monitoring and abatement of the damaged ecological environment in mines.

scholarly journals Effects of Vegetation Restoration on Soil Bacterial Communities, Enzyme Activities, and Nutrients of Reconstructed Soil in a Mining Area on the Loess Plateau, China

2019 ◽  
Vol 11 (8) ◽  
pp. 2295 ◽  
Author(s):  
Pengfei Li ◽  
Xingchang Zhang ◽  
Mingde Hao ◽  
Yongxing Cui ◽  
Shilei Zhu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Bacterial Communities ◽  
Mining Area ◽  
Biochemical Properties ◽  
Vegetation Restoration ◽  
The Loess Plateau ◽  
Soil Biochemical Properties ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
Reconstructed Soil

Soil microbes are the main driving forces and influencing factors of biochemical reactions in the environment. Study of ecological recovery after mining activities has prompted wider recognition of the importance of microbial diversity to ecosystem recovery; however, the response of soil bacterial communities to vegetation restoration types and soil biochemical properties remains poorly understood. The purpose of this research was to explore the soil bacterial communities and soil biochemical properties at four sampling sites (brushland (BL), forestland (FL), grassland (GL) and unreclaimed land (UL)) on the Loess Plateau, China, to evaluate the effect of vegetation restoration on the reconstructed soil in mining areas. In August 2017, samples were collected at the Heidaigou coal mine dumps. Illumina MiSeq sequencing was used to identify the structure of the soil bacterial community and evaluate its relationships with soil biochemical properties. The results showed that soil biochemical properties (soil organic matter, available phosphorus, urease, sucrase, microbial biomass carbon and microbial biomass nitrogen) were significantly increased in BL, FL and GL relative to UL, indicating that the soil quality was significantly improved by vegetation restoration. In addition, the results showed that the vegetation restoration on the reconstructed soil in the mining area could significantly improve the operational taxonomic units (OTUs), abundance (ACE and Chao1) and diversity (Shannon and Simpson) indices of bacterial community and the dominant phyla were Proteobacteria, Actinobacteria and Acidobacteria. With vegetation restoration, the relative abundance of Proteobacteria and Acidobacteria showed an increasing trend, while that of Actinobacteria showed a decreasing trend, and the dominant phyla were only significantly correlated with a few biochemical properties. Moreover, there were no changes in soil bacterial community structures across the four sampling sites and the response of the bacterial community to biochemical properties was not obvious. This implies that, although the region has experienced about 20 years of vegetation restoration, the microbial community still maintains good stability and lagging response to soil biochemical properties. Since the BL soil had better biochemical properties and higher bacterial richness and diversity, it was recommended as the optimum vegetation restoration type for soil reclamation in this area.

scholarly journals Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China

2019 ◽  
Vol 16 (24) ◽  
pp. 4892 ◽  
Author(s):  
Zhanbin Luo ◽  
Jing Ma ◽  
Fu Chen ◽  
Xiaoxiao Li ◽  
Huping Hou ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Loess Plateau ◽  
Bacterial Communities ◽  
Nutrient Loss ◽  
Community Diversity ◽  
Available Phosphorus ◽  
Soil Microbial Community Structure ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Soil microorganisms play a key role in global biogeochemical changes. To understand the interactions among soil bacterial communities and their responses to extreme environments, the soil properties and bacterial community diversity were determined in the post-mining ecosystem of the Loess Plateau, China. The results showed that the soil temperature, pH, organic matter, available phosphorus, and available potassium values were significantly reduced in the post-mining cracks area. However, the richness and uniformity of soil bacterial communities increased by about 50% in the post-mining cracks area. Soil microbial community structure and the network interactions tended to be complex and strengthened in the post-mining cracks area. Moreover, soil nutrient loss caused the differences in soil bacterial community structure compositions in the post-mining cracks area. Furthermore, the relationships between soil physicochemical properties and different modules of the soil bacterial molecular ecological network were changed in a complex manner in the post-mining cracks area. This study provides a theoretical basis for adaptive management and response to cracks in post-mining areas and under other extreme conditions.

scholarly journals Structure and Diversity of Soil Bacterial Communities in Offshore Islands

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yu-Te Lin ◽  
Yu-Fei Lin ◽  
Isheng J. Tsai ◽  
Ed-Haun Chang ◽  
Shih-Hao Jien ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Soil Bacterial Communities ◽  
Soil Bacterial
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