Effects of diphenylarsinic acid on bacterial and archaeal community structures in an anaerobic paddy soil

Geoderma ◽  
2013 ◽  
Vol 195-196 ◽  
pp. 243-250 ◽  
Author(s):  
Ling Guan ◽  
Naoki Harada ◽  
Yasushi Ono ◽  
Takuya Takahashi ◽  
Kunihiko Fujii ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Archaeal Community ◽  
Community Structures

Effect of long-term fertilization on archaeal community structure in cal-careous purplish paddy soil

2011 ◽  
Vol 19 (3) ◽  
pp. 369-376
Author(s):  
Gu Yunfu ◽  
Zhang Xiaoping ◽  
Tu Shihua ◽  
Lindström Kristina
Keyword(s):  
Community Structure ◽  
Paddy Soil ◽  
Archaeal Community

scholarly journals Variation of Bacterial and Archaeal Community Structures in a Full-Scale Constructed Wetlands for Wastewater Treatment

Archaea ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Xiu-lu Lang ◽  
Xiang Chen ◽  
Ai-ling Xu ◽  
Zhi-wen Song ◽  
Xin Wang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Constructed Wetlands ◽  
Relative Abundance ◽  
Constructed Wetland ◽  
Free Surface Flow ◽  
Archaeal Community ◽  
Illumina Miseq ◽  
Surface Flow ◽  
Community Structures ◽  
Soil And Water

Microorganisms play important roles in the reduction of organic and inorganic pollutants in constructed wetlands used for the treatment of wastewater. However, the diversity and structure of microbial community in constructed wetland system remain poorly known. In this study, the Illumina MiSeq Sequencing of 16S rDNA was used to analyze the bacterial and archaeal microbial community structures of soil and water in a free surface flow constructed wetland, and the differences of bacterial communities and archaeal compositions between soil and water were compared. The results showed that the Proteobacteria were the dominant bacteria, making up 35.38%~48.66% relative abundance. Euryarchaeotic were the absolute dominant archaea in the influent sample with the relative abundance of 93.29%, while Thaumarchaeota showed dominance in the other three samples, making up 50.58%~75.70%. The relative abundances of different species showed great changes in bacteria and archaea, and the number of dominant species in bacteria was much higher than that in archaea. Compared to archaea, the community compositions of bacteria were more abundant and the changes were more significant. Meanwhile, bacteria and archaea had large differences in compositions between water and soil. The microbial richness in water was significantly higher than that in soil. Simultaneously, soil had a significant enrichment effect on some microbial flora.

scholarly journals Distribution of Archaea in a Black Smoker Chimney Structure

2001 ◽  
Vol 67 (8) ◽  
pp. 3618-3629 ◽  
Author(s):  
Ken Takai ◽  
Tetsushi Komatsu ◽  
Fumio Inagaki ◽  
Koki Horikoshi
Keyword(s):  
Enrichment Culture ◽  
Archaeal Community ◽  
Polymorphism Analysis ◽  
Community Structures ◽  
Black Smoker ◽  
Culture Methods ◽  
X Ray ◽  
Combined Use ◽  
Culture Independent ◽  
Archaeal Communities

ABSTRACT Archaeal community structures in microhabitats in a deep-sea hydrothermal vent chimney structure were evaluated through the combined use of culture-independent molecular analyses and enrichment culture methods. A black smoker chimney was obtained from the PACMANUS site in the Manus Basin near Papua New Guinea, and subsamples were obtained from vertical and horizontal sections. The elemental composition of the chimney was analyzed in different subsamples by scanning electron microscopy and energy-dispersive X-ray spectroscopy, indicating that zinc and sulfur were major components while an increased amount of elemental oxygen in exterior materials represented the presence of oxidized materials on the outer surface of the chimney. Terminal restriction fragment length polymorphism analysis revealed that a shift in archaeal ribotype structure occurred in the chimney structure. Through sequencing of ribosomal DNA (rDNA) clones from archaeal rDNA clone libraries, it was demonstrated that the archaeal communities in the chimney structure consisted for the most part of hyperthermophilic members and extreme halophiles and that the distribution of such extremophiles in different microhabitats of the chimney varied. The results of the culture-dependent analysis supported in part the view that changes in archaeal community structures in these microhabitats are associated with the geochemical and physical dynamics in the black smoker chimney.

scholarly journals Response of methane production via propionate oxidation to carboxylated multiwalled carbon nanotubes in paddy soil enrichments

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4267 ◽  
Author(s):  
Jianchao Zhang ◽  
Xingxuan Xia ◽  
Siliang Li ◽  
Wei Ran
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Paddy Soil ◽  
Archaeal Community ◽  
Major Product ◽  
Natural Environments ◽  
Cell Integrity ◽  
Multiwalled Carbon ◽  
Propionate Degradation ◽  
Propionate Oxidation

Carboxylated multiwalled carbon nanotubes (MWCNTs-COOH) have become a growing concern in terms of their fate and toxicity in aqueous environments. Methane (CH4) is a major product of organic matter degradation in waterlogged environments. In this study, we determined the effect of MWCNTs-COOH on the production of CH4 from propionate oxidation in paddy soil enrichments. The results showed that the methanogenesis from propionate degradation was accelerated in the presence of MWCNTs-COOH. In addition, the rates of CH4 production and propionate degradation increased with increasing concentrations of MWCNTs-COOH. Scanning electron microscopy (SEM) observations showed that the cells were intact and maintained their structure in the presence of MWCNTs-COOH. In addition, SEM and fluorescence in situ hybridization (FISH) images revealed that the cells were in direct contact with the MWCNTs and formed cell-MWCNTs aggregates that contained both bacteria and archaea. On the other hand, nontoxic magnetite nanoparticles (Fe3O4) had similar effects on the CH4 production and cell integrity as the MWCNTs-COOH. Compared with no nanomaterial addition, the relative abundances of Geobacter and Methanosarcina species increased in the presence of MWCNTs-COOH. This study suggests that MWCNTs-COOH exerted positive rather than cytotoxic effects on the syntrophic oxidation of propionate in paddy soil enrichments and affected the bacterial and archaeal community structure at the test concentrations. These findings provide novel insight into the consequences of nanomaterial release into anoxic natural environments.

scholarly journals Warming shapes nirS- and nosZ-type denitrifier communities and stimulates N2O emission in acidic paddy soil

2021 ◽  
Author(s):  
Xiaoyi Xing ◽  
Yafang Tang ◽  
Huifang Xu ◽  
Hongling Qin ◽  
Yi Liu ◽  
...  
Keyword(s):  
Global Warming ◽  
Elevated Temperature ◽  
Paddy Soil ◽  
High Throughput Sequencing ◽  
Pore Space ◽  
Paddy Soils ◽  
Community Structures ◽  
Total N ◽  
Temperature Range ◽  
Denitrifier Communities

Warming strongly stimulates soil nitrous oxide (N2O) emission, contributing to the global warming trend. Submerged paddy soils exhibit huge N2O emission potential; however, the N2O emission pathway and underlying mechanisms under warming are not clearly understood. We conducted an incubation experiment using 15N to investigate the dynamics of N2O emission at controlled temperatures (5, 15, 25, and 35 °C) in 125% water-filled pore space. The community structures of nitrifiers and denitrifiers were determined via high-throughput sequencing of functional genes. Our results showed that elevated temperature sharply enhanced soil N2O emission from submerged paddy soil. Denitrification was the main contributor, accounting for more than 90% of total N2O emission at all treatment temperatures. N2O flux was coordinatively regulated by nirK-, nirS-, and nosZ-containing denitrifiers, but not ammonia-oxidising archaea or ammonia-oxidising bacteria. The nirS-containing denitrifiers were more sensitive to temperature shifts, especially at a lower temperature range (5 to 25 °C), and showed a stronger correlation with N2O flux than that of nirK-containing denitrifiers. By contrast, nosZ-containing denitrifiers exhibited substantial variation at higher temperatures (15 to 35 °C), thereby playing an important role in N2O consumption. Certain taxa of nirS- and nosZ-containing denitrifiers regulated N2O flux, including nirS-containing denitrifiers affiliated with Rhodanbacter and Cupriavidus as well as nosZ-containing denitrifiers affiliated with Azoarcus and Azospirillum. Together, these findings suggest that elevated temperature can significantly increase N2O emission from denitrification in submerged paddy soils by shifting the overall community structures and enriching some indigenous taxa of nirS- and nosZ-containing denitrifiers. Importance The interdependence between global warming and greenhouse gas N2O has always been the hotspot. However, information on factors contributing to N2O and temperature-dependent community structure changes are scarce. This study demonstrated high temperature-induced N2O emission from submerged paddy soils, mainly via stimulating denitrification. Further, we speculate that key functional denitrifiers drive N2O emission. This study showed that denitrifiers were more sensitive to temperature rise than nitrifiers, and the temperature sensitivity differed among denitrifier communities. N2O-consuming denitrifiers (nosZ-containing denitrifiers) were more sensitive at a higher temperature range than N2O-producing denitrifiers (nirS-containing denitrifiers). This study’s findings help predict N2O fluxes under different degrees of warming and develop strategies to mitigate N2O emissions from paddy fields based on microbial community regulation.

The bacterial and archaeal community structures and methanogenic potential of the cecal microbiota of goats fed with hay and high-grain diets

2018 ◽  
Vol 111 (11) ◽  
pp. 2037-2049 ◽  
Author(s):  
Wei Jin ◽  
Yin Li ◽  
Yanfen Cheng ◽  
Shengyong Mao ◽  
Weiyun Zhu
Keyword(s):  
Archaeal Community ◽  
Community Structures ◽  
Cecal Microbiota

Distinctive effects of TiO 2 and CuO nanoparticles on soil microbes and their community structures in flooded paddy soil

2015 ◽  
Vol 86 ◽  
pp. 24-33 ◽  
Author(s):  
Chen Xu ◽  
Cheng Peng ◽  
Lijuan Sun ◽  
Shu Zhang ◽  
Haomin Huang ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Soil Microbes ◽  
Cuo Nanoparticles ◽  
Community Structures ◽  
Flooded Paddy Soil
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