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

Biology ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1329
Author(s):  
Zhi Yu ◽  
Kunnan Liang ◽  
Guihua Huang ◽  
Xianbang Wang ◽  
Mingping Lin ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Bacterial Communities ◽  
Soil Bacterial Community ◽  
Community Diversity ◽  
Soil Bacterial Communities ◽  
Bacterial Community Diversity ◽  
Teak Plantation ◽  
Soil Bacterial ◽  
Total Potassium ◽  
Significant Factors

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.

Effects of inoculation with organic-phosphorus-mineralizing bacteria on soybean (Glycine max) growth and indigenous bacterial community diversity

2017 ◽  
Vol 63 (5) ◽  
pp. 392-401 ◽  
Author(s):  
Wei Sun ◽  
Xun Qian ◽  
Jie Gu ◽  
Xiao-Juan Wang ◽  
Yang Li ◽  
...  
Keyword(s):  
Glycine Max ◽  
Carbon Source ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Organic Phosphorus ◽  
Community Diversity ◽  
Carbon Source Utilization ◽  
Soil Bacterial Communities ◽  
Bacterial Community Diversity ◽  
Soil Bacterial

Three different organic-phosphorus-mineralizing bacteria (OPMB) strains were inoculated to soil planted with soybean (Glycine max), and their effects on soybean growth and indigenous bacterial community diversity were investigated. Inoculation with Pseudomonas fluorescens Z4-1 and Brevibacillus agri L7-1 increased organic phosphorus degradation by 22% and 30%, respectively, compared with the control at the mature stage. Strains P. fluorescens Z4-1 and B. agri L7-1 significantly improved the soil alkaline phosphatase activity, average well color development, and the soybean root activity. Terminal restriction fragment length polymorphism analysis demonstrated that P. fluorescens Z4-1 and B. agri L7-1 could persist in the soil at relative abundances of 2.0%–6.4% throughout soybean growth. Thus, P. fluorescens Z4-1 and B. agri L7-1 could potentially be used in organic-phosphorus-mineralizing biofertilizers. OPMB inoculation altered the genetic structure of the soil bacterial communities but had no apparent influence on the carbon source utilization profiles of the soil bacterial communities. Principal components analysis showed that the changes in the carbon source utilization profiles of bacterial community depended mainly on the plant growth stages rather than inoculation with OPMB. The results help to understand the evolution of the soil bacterial community after OPMB inoculation.

scholarly journals Soil bacterial community diversity and composition vary more with elevation than seasons in alpine habitats of western Himalaya

2020 ◽  
Author(s):  
Pamela Bhattacharya ◽  
Samrat Mondol ◽  
Gautam Talukdar ◽  
Gopal Singh Rawat
Keyword(s):  
Bacterial Community ◽  
High Altitude ◽  
Bacterial Communities ◽  
Western Himalaya ◽  
Soil Bacterial Community ◽  
Community Diversity ◽  
Soil Bacterial Communities ◽  
Alpine Habitats ◽  
Soil Bacterial ◽  
The Himalaya

AbstractSoil heterotrophic respiration-driven CO2 emissions, its impact on global warming and the mechanistic roles of soil bacterial communities in this process have been an area of active research. However, our knowledge regarding the effects of environmental changes on soil bacterial communities is limited. To this end, the climate-sensitive high-altitude alpine ecosystems offer ideal opportunities to investigate relationship between climate change and bacterial communities. While data from several high-altitude mountain regions suggest that local environment factors and geological patterns govern bacterial communities, no information is available from the Himalaya. Here we provide baseline information on seasonal soil bacterial community diversity and composition along a 3200-4000 m elevation gradient covering four alpine habitats (subalpine forest, alpine scrub, alpine meadow and moraine) in Gangotri National Park, western Himalaya. Bacterial metabarcoding data from 36 field-collected samples showed no elevation trend in the bacterial richness and a non-monotonous decrease in their diversity. Further, their community diversity and composition varied significantly among habitats along elevation but were stable seasonally within each habitat. The richness was primarily influenced by soil inorganic carbon (SOC) and total nitrogen (TN), whereas temperature, SOC and TN affected diversity and composition patterns. Given the importance of the Himalaya in the context of global carbon cycle this information will help in accurate modeling of climate adaptation scenarios of bacterial niches and their downstream impacts towards climate warming.

scholarly journals Diversity of Soil Bacterial Community Is Influenced by Spatial Location and Time but Not Potato Cultivar

2020 ◽  
Vol 4 (3) ◽  
pp. 225-238
Author(s):  
Kamrun Nahar ◽  
Jean-Baptiste Floc’h ◽  
Claudia Goyer ◽  
Bernie J. Zebarth ◽  
Sean Whitney
Keyword(s):  
Bacterial Community ◽  
Bacterial Communities ◽  
Common Scab ◽  
Potato Cultivar ◽  
Community Diversity ◽  
Bacterial Community Diversity ◽  
Streptomyces Spp ◽  
Β Diversity ◽  
Soil Bacterial ◽  
Spatial Locations

Potato cultivars susceptible to common scab were previously reported to harbor five to six times more abundant pathogenic Streptomyces spp. in the rhizosphere soils compared with tolerant cultivars. It is still unclear if the diversity of soil bacterial communities is related to the abundance of pathogenic Streptomyces spp. This study evaluated the effects of potato cultivar on the diversity of bacterial communities in three spatial locations (soil located close to the plant [SCP], in the rhizosphere soil [RS], and in the geocaulosphere soil [GS]) in 2013 and 2014. Common scab tolerant (Goldrush and Hindenburg) and susceptible cultivars (Green Mountain and Agria) were planted in a field infested with pathogenic Streptomyces spp. causing common scab. The β-diversity of the bacterial community was significantly different between years and on dates within each year according to a permutational multivariate analysis of variance. The β-diversity also varied significantly among spatial locations (i.e., SCP, RS, and GS), probably due to changes in soil properties, but did not change significantly among potato cultivars. The architecture of the bacterial network in RS in 2014 was more complex compared with 2013 with a 2.5-fold increase in the number of bacteria included according to a co-occurrence analysis. These results indicated that the soil bacterial community diversity changed temporally and spatially. However, bacterial community diversity and richness were not affected by potato cultivar, suggesting that there were no relationships between bacterial community diversity or richness and the abundance of pathogenic Streptomyces spp.

scholarly journals The Influence of Land Use Patterns on Soil Bacterial Community Structure in the Karst Graben Basin of Yunnan Province, China

Forests ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 51 ◽  
Author(s):  
Jiangmei Qiu ◽  
Jianhua Cao ◽  
Gaoyong Lan ◽  
Yueming Liang ◽  
Hua Wang ◽  
...  
Keyword(s):  
Land Use ◽  
Surface Layer ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Yunnan Province ◽  
Soil Bacterial Community ◽  
Land Use Patterns ◽  
Use Patterns ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Land use patterns can change the structure of soil bacterial communities. However, there are few studies on the effects of land use patterns coupled with soil depth on soil bacterial communities in the karst graben basin of Yunnan province, China. Consequently, to reveal the structure of the soil bacterial community at different soil depths across land use changes in the graben basins of the Yunnan plateau, the relationship between soil bacterial communities and soil physicochemical properties was investigated for a given area containing woodland, shrubland, and grassland in Yunnan province by using next-generation sequencing technologies coupled with soil physicochemical analysis. Our results indicated that the total phosphorus (TP), available potassium (AK), exchangeable magnesium (E-Mg), and electrical conductivity (EC) in the grassland were significantly higher than those in the woodland and shrubland, yet the total nitrogen (TN) and soil organic carbon (SOC) in the woodland were higher than those in the shrubland and grassland. Proteobacteria, Verrucomicrobia, and Acidobacteria were the dominant bacteria, and their relative abundances were different in the three land use types. SOC, TN, and AK were the most important factors affecting soil bacterial communities. Land use exerts strong effects on the soil bacterial community structure in the soil’s surface layer, and the effects of land use attenuation decrease with soil depth. The nutrient content of the soil surface layer was higher than that of the deep layer, which was more suitable for the survival and reproduction of bacteria in the surface layer.

scholarly journals High throughput sequencing-based analysis of the soil bacterial community structure and functions of Tamarix shrubs in the lower reaches of the Tarim River

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12105
Author(s):  
Fangnan Xiao ◽  
Yuanyuan Li ◽  
Guifang Li ◽  
Yaling He ◽  
Xinhua Lv ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Bacterial Communities ◽  
Metabolic Pathways ◽  
Soil Bacteria ◽  
High Throughput Sequencing ◽  
Soil Bacterial Community ◽  
Tarim River ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
And Function

Tamarix is a dominant species in the Tarim River Basin, the longest inland river in China. Tamarix plays an important role in the ecological restoration of this region. In this study, to investigate the soil bacterial community diversity in Tamarix shrubs, we collected soil samples from the inside and edge of the canopy and the edge of nebkhas and non-nebkhas Tamarix shrubs located near the Yingsu section in the lower reaches of Tarim River. High throughput sequencing technology was employed to discern the composition and function of soil bacterial communities in nebkhas and non-nebkhas Tamarix shrubs. Besides, the physicochemical properties of soil and the spatial distribution characteristics of soil bacteria and their correlation were analyzed. The outcomes of this analysis demonstrated that different parts of Tamarix shrubs had significantly different effects on soil pH, total K (TK), available K (AK), ammonium N (NH4+), and available P (AP) values (P < 0.05), but not on soil moisture (SWC), total salt (TDS), electrical conductivity (EC), organic matter (OM), total N (TN), total P (TP), and nitrate N (NO3−) values. The soil bacterial communities identified in Tamarix shrubs were categorized into two kingdoms, 71 phyla, 161 classes, 345 orders, 473 families, and 702 genera. Halobacterota, unidentified bacteria, and Proteobacteria were found to be dominant phyla. The correlation between the soil physicochemical factors and soil bacterial community was analyzed, and as per the outcomes OM, AK, AP, EC, and NH4+ were found to primarily affect the structure of the soil bacterial community. SWC, TK and pH were positively correlated with each other, but negatively correlated with other soil factors. At the phyla level, a significantly positive correlation was observed between the Halobacterota and AP, OM as well as Bacteroidota and AK (P < 0.01), but a significantly negative correlation was observed between the Chloroflexi and AK, EC (P < 0.01). The PICRUSt software was employed to predict the functional genes. A total of 6,195 KEGG ortholog genes were obtained. The function of soil bacteria was annotated, and six metabolic pathways in level 1, 41 metabolic pathways in level 2, and 307 metabolic pathways in level 3 were enriched, among which the functional gene related to metabolism, genetic information processing, and environmental information processing was found to have the dominant advantage. The results showed that the nebkhas and canopy of Tamarix shrubs had a certain enrichment effect on soil nutrients content, and bacterial abundance and significant effects on the structure and function of the soil bacterial community.

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