scholarly journals Petroleum-contamination drives the shift of microbiome through modifying soil metallome

2021 ◽  
Author(s):  
Zhe Liu ◽  
Meixia Gu ◽  
Wei Zhu ◽  
Mengru Zhang ◽  
Weizhi Zhou
Keyword(s):  
Physicochemical Properties ◽  
Soil Microbial Communities ◽  
Oil Field ◽  
Total Carbon ◽  
Petroleum Contamination ◽  
Soil Physicochemical Properties ◽  
Short Term ◽  
Soil Microbial ◽  
Microbial Network ◽  
Α Diversity

Soil oil-pollution is one of the most severe environmental issues at present. Shifts of soil metallome and microbiome are essential indicators for risk assessment and remediation of field soil pollutions, but not well studied undergoing the petroleum contamination. In this research, soil samples were collected from a short-term and long-term petroleum-contaminated oil field. The soil physicochemical properties, metallome, microbial community, and polluted and unpolluted soil network were testified. Results showed that the contents of soil total petroleum hydrocarbon, total carbon, total nitrogen, total sulfur, total phosphorus, calcium, copper, manganese, lead, and zinc were increased by petroleum contamination. In contrast, the soil pH was decreased by petroleum contamination regardless of the pollution duration. Petroleum-contamination also reduced bacterial and fungal α-diversity indices. In contrast, bacterial α-diversity was negatively correlated with soil TPH and EC, and fungal α-diversity was negatively correlated with soil EC. Moreover, the relative abundances of Proteobacteria, Ascomycota, Oleibacter, and Fusarium in soil were increased by petroleum contamination. Network analysis showed that number of links, modules and the network invulnerability decreased in PS, followed by the OS group. These results demonstrate that short-term heavy petroleum contamination can cause shifts in soil physicochemical properties, metallome, and microbiome and assemble a less complex and vulnerable soil microbial network. Moreover, natural restoration can hardly amend soil properties and microbial network structure. This research emphasizes that the uncommonly studied soil metallome may play a vital part in the reaction of soil microbial communities to petroleum-contamination and potential application value of synthetic community in bioremediation.

scholarly journals Soil Microbial Community Structure and Physicochemical Properties in Amomum tsaoko-based Agroforestry Systems in the Gaoligong Mountains, Southwest China

2019 ◽  
Vol 11 (2) ◽  
pp. 546 ◽  
Author(s):  
Guizhou Liu ◽  
Man Jin ◽  
Chuantao Cai ◽  
Chaonan Ma ◽  
Zhongsuzhi Chen ◽  
...  
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Physicochemical Properties ◽  
Phospholipid Fatty Acid ◽  
Soil Microbial Communities ◽  
Total Carbon ◽  
Native Forest ◽  
Soil Microbial Community Structure ◽  
Soil Microbial ◽  
The Impact

Amomum tsaoko is cultivated in forests of tropical and subtropical regions of China, and the planting area is expanding gradually. However, little attention has been paid to the impact of A. tsaoko cultivation on the soil characteristics of the regions. We analyzed the effects of the A. tsaoko-forest agroforestry system (AFs) on the composition of soil microbial communities with increasing stand ages. We also compared the soil physicochemical properties, microbial biomass, and phospholipid fatty acid (PLFA) composition between native forest (NF) and AFs. The results showed that the level of total carbon, nitrogen, and organic matter dramatically dropped in AFs with increasing stand ages. pH affected other soil properties and showed close correlation to total carbon (P = 0.0057), total nitrogen (P = 0.0146), organic matter (P = 0.0075), hydrolyzable nitrogen (P = 0.0085), available phosphorus (P < 0.0001), and available potassium (P = 0.0031). PLFAs of bacteria (F = 4.650, P = 0.037), gram-positive bacteria (F = 6.640, P = 0.015), anaerobe (F = 5.672, P = 0.022), and total PLFA (F = 4.349, P = 0.043) were significantly affected by different treatments, with the greatest value for NF treatment, and least value for AF5. However, the microbial biomass declined during the initial 5 years of cultivation, but it reached the previous level after more than 10 years of cultivation. Our research suggests that AFs is a profitable land-use practice in the Gaoligong Mountains and that AFs showed a recovering trend of the soil nutrient condition with increasing stand ages. However, the severe loss of nitrogen in the soil of AFs requires additional nitrogen during cultivation to restore it to pre-cultivation levels.

scholarly journals Soil Bacterial and Fungal Composition and Diversity Responses to Seasonal Deer Grazing in a Subalpine Meadow

Diversity ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 84
Author(s):  
Andéole Niyongabo Turatsinze ◽  
Baotian Kang ◽  
Tianqi Zhu ◽  
Fujiang Hou ◽  
Saman Bowatte
Keyword(s):  
Relative Abundance ◽  
Soil Microbial Communities ◽  
Gansu Province ◽  
Total Carbon ◽  
Mountain Range ◽  
Microbial Composition ◽  
Soil Microbial ◽  
Β Diversity ◽  
Α Diversity ◽  
Soil Bacterial

Soil microbial composition and diversity are widely recognized for their role in ecological functioning. This study examined the differences of soil microbial communities between two seasonally grazed grasslands. The study area was in the Gansu red deer farm located on the Qilian Mountain range in the Gansu province of northwestern China. This farm adopted a seasonal rotation grazing system whereby grasslands at higher altitudes are grazed in summer (SG), whilst grasslands at lower altitudes are grazed in winter (WG). The soil bacterial and fungal communities were examined by Illumina MiSeq sequencing. We found that soil water content (SWC), organic carbon (OC), total carbon (TC), and total nitrogen (TN) were significantly higher, whereas the C/N ratio was significantly lower in SG than WG pastures. The α-diversity of bacteria was greater than that of fungi in both pastures, while both bacterial and fungal α-diversity were not significantly different between the pastures. The bacterial β-diversity was significantly different between the pastures, but fungal β-diversity was not. The bacterial phylum Actinobacteria and fungal phylum Ascomycota were dominant in both pastures. The relative abundance of Actinobacteria in soil was significantly higher in WG pastures, whereas the relative abundance of Proteobacteria in soil was significantly higher in SG pastures. Significant correlations between bacterial and fungal phyla and soil properties were observed, but this varied between the two grasslands. This study showed that distinct microbial community structures developed in two pastures within the same geographic location that were grazed in different seasons.

scholarly journals Manure substitution of chemical fertilizer affect soil microbial community diversity, structure and function in greenhouse vegetable production systems

2019 ◽  
Author(s):  
Haoan Luan ◽  
Wei Gao ◽  
Shaowen Huang ◽  
Jiwei Tang ◽  
Mingyue Li ◽  
...  
Keyword(s):  
Microbial Community ◽  
Physicochemical Properties ◽  
Soil Microbial Community ◽  
Enzyme Activities ◽  
Substitution Rate ◽  
Soil Microbial Communities ◽  
Chemical Fertilizer ◽  
Soil Physicochemical Properties ◽  
Soil Microbial ◽  
Microbial Characteristics

ABSTRACTSoil microbial community and enzyme activities together affect various ecosystem functions of soils. Fertilization, as important agricultural management practices, are known to modify soil microbial characteristics; however, inconsistent results have been reported. The aim of this research therefore was to make a comparative study of the effects of different fertilization patterns (No N inputs (No N), 100% chemical fertilizer-N (CN) inputs (4/4CN) and different substitution rates of CN by organic manure-N (MN) (3/4CN+1/4MN, 2/4CN+2/4MN and 1/4CN+3/4MN)) on soil physicochemical properties, enzyme activities and microbial attributes in a GVP of Tianjin, China. Manure substitution of chemical fertilizer, especially at higher substitution rate (2/4CN+2/4MN and 1/4CN+3/4MN), improved soil physicochemical properties (higher soil organic C (SOC) and nutrient contents; lower bulk densities), promoted microbial growth (higher total phospholipid fatty acids and microbial biomass C contents) and activity (higher soil hydrolase activities). Manure addition caused a remarkable increase of the fungi/bacteria ratio and a distinct shift in the fungal (bacterial) community to greater abundance of arbuscular mycorrhizal fungi (G+ bacteria) compared with saprotrophic fungi (G− bacteria). These changes drove shifts toward fungal-dominated soil microbial communities and then optimized microbial community structure. Also, manure application increased soil biodiversity (microbial community and enzyme function), indicated by increased Shannon–Wiener diversity. Redundancy analysis indicated that the most possible mechanism of the impacts of different fertilization patterns on soil microbial characteristics may be the mediation of SOC and nutrient (N) availability (especially SOC) in this GVP of China. In conclusion, manure substitution of chemical fertilizer, especially at higher substitution rate, was more efficient for improving soil quality and biological functions.

scholarly journals Alteration of Nutrient Substrates and Absence of Seawater Due to Coastal Embankments Affects Soil Microbial Communities in Salt Marshes of Eastern China

2021 ◽  
Author(s):  
Hongyu Feng ◽  
Yajun Qiao ◽  
Lu Xia ◽  
Wen Yang ◽  
Yongqiang Zhao ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Eastern China ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Rrna Gene ◽  
Soil Physicochemical Properties ◽  
Organic C ◽  
Soil Microbial ◽  
Bacterial And Archaeal Communities ◽  
Archaeal Communities

Abstract Aims: Although the influence of coastal embankments on soil physicochemical properties and carbon (C) and nitrogen (N) cycling has been widely studied, the mechanisms of their effects on the soil microbial ecology are still poorly understood. Thus, the aim of this study was to investigate variations in soil bacterial and archaeal communities between natural and embanked saltmarshes, as well as the determinants that drive these variations.Methods: 16S rRNA gene sequence analysis was performed to assess the impacts of embankments on the bacterial and archaeal communities of the invasive Spartina alterniflora Loisel., as well as native Suaeda salsa (L.) Pall. and Phragmites australis (Cav.) Trin. ex Steud. saltmarshes in the coastal China.Results: Embankments significantly decreased the Simpson diversity index of the S. alterniflora saltmarsh, while increasing the OTU richness in the P. australis saltmarsh. Additionally, the bacterial and archaeal community compositions in the embanked S. alterniflora and P. australis saltmarshes were considerably modified. However, no variations were found between the bacterial and archaeal communities of the natural and embanked S. salsa saltmarshes.Conclusions: These results were possibly because embankments decreased the soil nutrient substrates (e.g., soil organic C and N) dramatically in the S. alterniflora saltmarsh, while increased soil nutrient substrates significantly in the P. australis saltmarsh. However, embankments had a negligible effect on the soil nutrient substrates in the S. salsa saltmarsh. Moreover, embankments increased the abundance of Betaproteobacteria, and decreased the abundance of sulfur- and sodium-dependent bacteria due to the dramatic change in soil physicochemical properties.

scholarly journals Coupling Effects of Goat Manure and Water Management on Immobilization of Cadmium and Improvement of Bacterial Community

2022 ◽  
Author(s):  
Yiyun Liu ◽  
Yingming Xu ◽  
Qingqing Huang ◽  
Xu Qin ◽  
Lijie Zhao ◽  
...  
Keyword(s):  
Water Management ◽  
Bacterial Community ◽  
Physicochemical Properties ◽  
Soil Microbial Communities ◽  
Soil Physicochemical Properties ◽  
Water Condition ◽  
Soil Microbial ◽  
Goat Manure ◽  
Remediation Process ◽  
Amended Soil

Abstract The objective of this study was to expound possible effect of fertilization and water management in the remediation process of hazardous substance using sepiolite(SP). Meanwhile, Illumina high-throughput sequencing was performed to investigate how the composition of the rhizosphere bacterial community responded to a series of soil remediation process. The results showed that application of SP increased pH, decreased DOM under different water condition, but goat manure (GM) increased pH and DOM at the same time. Under water-saturated condition (FWHC), the application of GM increased the content of available Cd (DTPA-Cd) by 42.0-68.9%, 13.1%-30.3% of unamended and SP-amended soil, respectively. Under normal water condition (NWHC), the application of GM increased DTPA-Cd by 0.7%-5.8%, 73.7%-115.5% of unamended and SP-amended soil, respectively. Consequently, coupling effect of FWHC and GM decreased Cd content in shoots of pak choi. We also found that the application of GM increased the abundance of soil microbial communities. Abundance of proteobacteria reached a peak when applied GM in SP-amended soil under FWHC. RDA analysis showed that soil microbes such as bacteroidetes, patescibacteria, and proteobacteria were correlated positively with pH, DOM, and DTPA-Cd. Acidobacteria was correlated positively with DTPA-Cd, and negatively with pH and DOM. The relationship of soil physicochemical properties and the bacterial community variation indicated that GM and SP mixed additives may indirectly affect the soil microbial community by changing soil physicochemical properties and available Cd content.

scholarly journals Effects of Short-Term Rice Straw Return on the Soil Microbial Community

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 561
Author(s):  
Enze Wang ◽  
Xiaolong Lin ◽  
Lei Tian ◽  
Xinguang Wang ◽  
Li Ji ◽  
...  
Keyword(s):  
Microbial Community ◽  
Rice Straw ◽  
Paddy Soil ◽  
Soil Microbial Community ◽  
Short Term ◽  
Soil Microbial ◽  
Microbial Network ◽  
Straw Return ◽  
Bacteria And Fungi ◽  
Main Factor

Rice straw is a byproduct of agricultural production and an important agricultural resource. However, rice straw has not yet been effectively used, and incorrect treatment methods (such as burning in the field) can cause serious damage to the environment. Studies have shown that straw returning is beneficial to soil, but there have been few studies focused on the effect of the amount of short-term straw returned on the soil microbial community. This study evaluates 0%, 50%, 75%, and 100% rice straw returned to the field on whether returning different amounts of straw in the short term would affect the diversity and composition of the soil microbial community and the correlation between bacteria and fungi. The results show that the amount of straw returned to the field is the main factor that triggers the changes in the abundance and composition of the microbial community in the paddy soil. A small amount of added straw (≤ 50% straw added) mainly affects the composition of the bacterial community, while a larger amount of added straw (> 50% straw added) mainly affects the composition of the fungal community. Returning a large amount of straw increases the microbial abundance related to carbon and iron cycles in the paddy soil, thus promoting the carbon and iron cycle processes to a certain extent. In addition, network analysis shows that returning a large amount of straw also increases the complexity of the microbial network, which may encourage more microbes to be niche-sharing and comprehensively improve the ecological environment of paddy soil. This study may provide some useful guidance for rice straw returning in northeast China.

scholarly journals Short-term plant legacy alters the resistance and resilience of soil microbial communities exposed to heat disturbance in a Mediterranean calcareous soil

2020 ◽  
Vol 108 ◽  
pp. 105740 ◽  
Author(s):  
Ana Beatriz de Oliveira ◽  
Amélie A.M. Cantarel ◽  
Marie Seiller ◽  
Alessandro Florio ◽  
Annette Bérard ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Calcareous Soil ◽  
Soil Microbial Communities ◽  
Short Term ◽  
Soil Microbial

scholarly journals Soil Physicochemical Properties and the Rhizosphere Soil Fungal Community in a Mulberry (Morus alba L.)/Alfalfa (Medicago sativa L.) Intercropping System

Forests ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 167 ◽  
Author(s):  
Mengmeng Zhang ◽  
Ning Wang ◽  
Jingyun Zhang ◽  
Yanbo Hu ◽  
Dunjiang Cai ◽  
...  
Keyword(s):  
Community Structure ◽  
Environmental Factors ◽  
Physicochemical Properties ◽  
Fungal Community ◽  
Total Carbon ◽  
Soil Physicochemical Properties ◽  
Planting Pattern ◽  
Fungal Community Structure ◽  
Soil Fungal Community ◽  
Soil Environmental Factors

A better understanding of soil fungal communities is very useful in revealing the effects of an agroforestry system and would also help us to understand the fungi-mediated effects of agricultural practices on the processes of soil nutrient cycling and crop productivity. Compared to conventional monoculture farming, agroforestry systems have obvious advantages in improving land use efficiency and maintaining soil physicochemical properties, reducing losses of water, soil material, organic matter, and nutrients, as well as ensuring the stability of yields. In this study, we attempted to investigate the impact of a mulberry/alfalfa intercropping system on the soil physicochemical properties and the rhizosphere fungal characteristics (such as the diversity and structure of the fungal community), and to analyze possible correlations among the planting pattern, the soil physicochemical factors, and the fungal community structure. In the intercropping and monoculture systems, we determined the soil physicochemical properties using chemical analysis and the fungal community structure with MiSeq sequencing of the fungal ITS1 region. The results showed that intercropping significantly improved the soil physicochemical properties of alfalfa (total nitrogen, alkaline hydrolysable nitrogen, available potassium, and total carbon contents). Sequencing results showed that the dominant taxonomic groups were Ascomycota, Basidiomycota, and Mucoromycota. Intercropping increased the fungal richness of mulberry and alfalfa rhizosphere soils and improved the fungal diversity of mulberry. The diversity and structure of the fungal community were predominantly influenced by both the planting pattern and soil environmental factors (total nitrogen, total phosphate, and total carbon). Variance partitioning analysis showed that the planting pattern explained 25.9% of the variation of the fungal community structure, and soil environmental factors explained 63.1% of the variation. Planting patterns and soil physicochemical properties conjointly resulted in changes of the soil fungal community structure in proportion.

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