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1. Changes in performance and bacterial communities in a continuous biohydrogen-producing reactor subjected to substrate- and pH-induced perturbations

Author:
García-Depraect, Octavio; Diaz-Cruces, Víctor F.; Rene, Eldon R.; León-Becerril, Elizabeth
Source:
Bioresource technology 2020 v.295 pp. 122182
ISSN:
0960-8524
Subject:
bacterial communities,   etc   ; biohydrogen; fermentation; lactose; pH; vinasse;     Show all 6 Subjects
Abstract:
... The performance and microbial communities of a continuous dark fermentation reactor exposed to perturbations induced by substrate change and acidic pH shock were investigated. A mesophilic well-mixed reactor separately fed with two types of tequila vinasses (TVs) and lactose was operated at a fixed pH of 5.5, except during short-term pH (3.8) stress, for ~61 days at decreasing hydraulic retention ...
DOI:
10.1016/j.biortech.2019.122182

2. Effect of a side-stream voltage supplied by sludge recirculation to an anaerobic digestion reactor

Author:
Park, Jun-Gyu; Kwon, Hye-Jeong; Sposob, Michal; Jun, Hang-Bae
Source:
Bioresource technology 2020 v.300 pp. 122643
ISSN:
0960-8524
Subject:
bacterial communities,   etc   ; anaerobic digestion; bacteria; commercialization; methanogens; sludge;     Show all 6 Subjects
Abstract:
... This study showed that side stream voltage supplied by sludge recirculation from an auxiliary bio-electrochemical anaerobic digestion (ABEAD) reactor appears to have a similar effect as main stream voltage supply to an anaerobic digestion (AD) reactor. The increased sludge recirculation rate enhanced the operation stability at a high OLR. H₂-producing bacterial community was improved in bio-electr ...
DOI:
10.1016/j.biortech.2019.122643

3. Bacterial community structure and gene function prediction in response to long-term running of dual graphene modified bioelectrode bioelectrochemical systems

Author:
Chen, Junfeng; Liu, Yanyan; Yang, Yuewei; Tang, Meizhen; Wang, Renjun; Jiang, Liting; Tian, Yuping; Hu, Hanwen; Zhang, Xiao; Wei, Yushan
Source:
Bioresource technology 2020 v.309 pp. 123398
ISSN:
0960-8524
Subject:
bacterial communities,   etc   ; Chthonomonas; Clostridium; Proteobacteria; bacteria; bioanodes; biocathodes; bioelectrochemistry; community structure; energy metabolism; graphene; metagenomics; prediction;     Show all 13 Subjects
Abstract:
... This work studied bacterial community structure and gene function prediction in long-term running of dual graphene modified bioelectrode bioelectrochemical systems (LT D-GM-BE BES, 2 year). The maximum power density of LT D-GM-BE BES was 99.03 ± 3.64 mW/m², which was 3.66 times of dual control BES (D-C-BE BES), and the transfer resistance of LT GM-BE was just approximately 1/4 of control bioelectr ...
DOI:
10.1016/j.biortech.2020.123398

4. LDPE microplastics significantly alter the temporal turnover of soil microbial communities

Author:
Wang, Jie; Huang, Muke; Wang, Qian; Sun, Yuanze; Zhao, Yanran; Huang, Yi
Source:
The Science of the total environment 2020 v.726 pp. 138682
ISSN:
0048-9697
Subject:
bacterial communities,   etc   ; community structure; microplastics; polyethylene; sequence analysis; soil; soil bacteria; soil ecosystems; soil sampling;     Show all 9 Subjects
Abstract:
... Although the ubiquitous presence of microplastics in various environments is increasingly well studied, knowledge of the effects of microplastics on ambient microbial communities is still insufficient. To estimate the response of soil bacterial community succession and temporal turnover to microplastic amendment, a soil microcosm experiment was carried out with polyethylene microplastics. The soil ...
DOI:
10.1016/j.scitotenv.2020.138682

5. Struvite-supported biochar composite effectively lowers Cu bio-availability and the abundance of antibiotic-resistance genes in soil

Author:
Li, Yuan; Wang, Xuejiang; Wang, Yuan; Wang, Fei; Xia, Siqing; Zhao, Jianfu
Source:
The Science of the total environment 2020 v.724 pp. 138294
ISSN:
0048-9697
Subject:
bacterial communities,   etc   ; Actinobacteria; Firmicutes; antibiotic resistance; antibiotic resistance genes; bioavailability; biochar; copper; pollution; soil;     Show all 10 Subjects
Abstract:
... The accumulation of heavy metals and the accelerated dissemination of antibiotic-resistance genes (ARGs) in soil receiving long-term manure application are causing worldwide concern. In this study, struvite-supported biochar composite (MAP/BC) obtained by N and P recovery from pig slurry with Mg(OH)₂-modified biochar (Mg(OH)₂/BC) was used as a novel amendment for the remediation of Cu- and ARG-con ...
DOI:
10.1016/j.scitotenv.2020.138294

6. The profile of antibiotic resistance genes in pig manure composting shaped by composting stage: Mesophilic-thermophilic and cooling-maturation stages

Author:
Cao, Rukun; Wang, Jian; Ben, Weiwei; Qiang, Zhimin
Source:
Chemosphere 2020 v.250 pp. 126181
ISSN:
0045-6535
Subject:
bacterial communities,   etc   ; Mycobacterium; antibiotic resistance; antibiotic resistance genes; bacteria; composting; pathogens; physicochemical properties; pig manure;     Show all 9 Subjects
Abstract:
... The variation of antibiotic resistance genes (ARGs) and influential factors in pig manure composting were investigated by conducting simulated composting tests using four different supplement materials (wheat straw, corn straw, poplar sawdust and spent mushroom). The results show that the relative abundance of total ARGs increased by 0.19–1.61 logs after composting, and tetX, sulI, sulII, dfrA1 an ...
DOI:
10.1016/j.chemosphere.2020.126181

7. Occurrence and distribution of antibiotic resistance genes in sediments in a semi-enclosed continental shelf sea

Author:
Zhang, Yuxuan; Lu, Jian; Wu, Jun; Wang, Jianhua; Lin, Yichen
Source:
The Science of the total environment 2020 v.720 pp. 137712
ISSN:
0048-9697
Subject:
bacterial communities,   etc   ; antibiotic resistance genes; bacteria; beta-lactams; coasts; continental shelf; principal component analysis; sediments;     Show all 8 Subjects
Abstract:
... Extensive and improper overuse of antibiotics resulted in the prevalence of antibiotic resistance genes (ARGs). As the typical semi-enclosed continental shelf sea, the Bohai Sea has been considered as one of the most polluted marine areas in China. However, no comprehensive investigation on the spatial distribution of ARGs in sediments from the Bohai Sea has been reported. A large-scale sampling w ...
DOI:
10.1016/j.scitotenv.2020.137712

8. Changed bacterial community in the river water samples upon introduction of biodegradable poly(3-hydroxybutyrate)

Author:
Kadoya, Ryosuke; Tanaka, Naoto; Fujita, Nobuyuki; Shiwa, Yuh; Taguchi, Seiichi
Source:
Polymer degradation and stability 2020 v.176 pp. 109144
ISSN:
0141-3910
Subject:
bacterial communities,   etc   ; bacteria; biodegradability; biodegradation; biodiversity; metagenomics; poly-3-hydroxybutyrate; polyethylene; river water; rivers; statistical analysis;     Show all 11 Subjects
Abstract:
... The addition effects of polymeric materials on natural environments have been mainly evaluated in terms of the relationships between culturable polymer-degrading microorganisms and/or their secreted enzymes and target materials. In this study, we applied metagenome analysis to better understand the change in unculturable microorganismal biodiversity in the four different river samples by using pol ...
DOI:
10.1016/j.polymdegradstab.2020.109144

9. Characteristics of airborne bacterial communities in indoor and outdoor environments during continuous haze events in Beijing: Implications for health care

Author:
Guo, Jianguo; Xiong, Yi; Shi, Changhua; Liu, Ce; Li, Hongwei; Qian, Hua; Sun, Zongke; Qin, Chuan
Source:
Environment international 2020 v.139 pp. 105721
ISSN:
0160-4120
Subject:
bacterial communities,   etc   ; Adonis; Clostridia; health services; human health; morbidity; phylogeny; pneumonia; pollutants; pollution; China;     Show all 11 Subjects
Abstract:
... There is solid evidence that haze pollution threatens human health owing to the abiotic pollutants it contains. However, the characteristics of airborne bacterial communities in indoor and outdoor environments exhibiting haze occurrence are still unknown. Thus, we examined variations in both indoor and outdoor airborne bacterial communities in Beijing from December 9–27, 2016, a period which inclu ...
DOI:
10.1016/j.envint.2020.105721

10. A brick in the wall: Discovering a novel mineral component of the biofilm extracellular matrix

Author:
Keren-Paz, Alona; Kolodkin-Gal, Ilana
Source:
New biotechnology 2020 v.56 pp. 9-15
ISSN:
1871-6784
Subject:
bacterial communities,   etc   ; Bacillus subtilis; Gram-negative bacteria; Mycobacterium smegmatis; antibiotics; biofilm; calcite; extracellular matrix; phylogeny; solutes;     Show all 10 Subjects
Abstract:
... Multicellular bacterial communities, known as biofilms, have been thought to be held together solely by a self-produced organic extracellular matrix (ECM). However, new evidence for a missed mineral constituent of ECM in both Gram-positive and Gram-negative bacterial species, is accumulating. Study of two phylogenetically distinct bacteria, Bacillus subtilis and Mycobacterium smegmatis, identified ...
DOI:
10.1016/j.nbt.2019.11.002

11. Sodium azide inhibition of microbial activities and impact on sludge floc destabilization

Author:
Suresh, Akshaykumar; Pan, Chaozhi; Ng, Wun Jern
Source:
Chemosphere 2020 v.244 pp. 125452
ISSN:
0045-6535
Subject:
bacterial communities,   etc   ; aerobes; ammonium; dissolved oxygen; flocculation; fluorescence; microbial activity; microorganisms; potassium; proteins; sludge; sodium azide;     Show all 12 Subjects
Abstract:
... Absence of sludge deflocculation under prolonged (24 h or longer) conditions with dissolved oxygen (DO) less than 0.5 mg L⁻¹ was recently reported. The reduced aerobic microbial activity, was speculated, had been compensated by the activity of other bacterial (i.e. facultative) communities. To assess such a compensation mechanism and to better evaluate impact of overall microbial activity on the f ...
DOI:
10.1016/j.chemosphere.2019.125452

12. Selectively enrichment of antibiotics and ARGs by microplastics in river, estuary and marine waters

Author:
Wang, Shanshan; Xue, Nana; Li, Wenfeng; Zhang, Daoyong; Pan, Xiangliang; Luo, Yongming
Source:
The Science of the total environment 2020 v.708 pp. 134594
ISSN:
0048-9697
Subject:
bacterial communities,   etc   ; antibiotics; aquatic environment; bacteria; estuaries; microplastics; risk; rivers; water salinity;     Show all 9 Subjects
Abstract:
... The partition of antibiotics and antibiotic resistant genes (ARGs) between the microplastics (MPs) and the surrounding water with various salinity are still unclear. In this study, we hypothesized that adsorption of antibiotics on MPs might cause a significant change of the structure of microbial communities, diversity and abundance of ARGs on MPs and this might be further affected by change of sa ...
DOI:
10.1016/j.scitotenv.2019.134594

13. Shifts of bacterial community and molecular ecological network at the presence of fluoroquinolones in a constructed wetland system

Author:
Li, Xinhui; Lu, Shaoyong; Liu, Shidi; Zheng, Quan; Shen, Peng; Wang, Xiaohui
Source:
The Science of the total environment 2020 v.708 pp. 135156
ISSN:
0048-9697
Subject:
bacterial communities,   etc   ; Clostridia; Dechloromonas; Delftia; chemical oxygen demand; community structure; constructed wetlands; fluoroquinolones; phosphorus; trophic relationships;     Show all 10 Subjects
Abstract:
... Fluoroquinolones (FQs) has caused increasing concerns regarding its potential environmental risks. However, their effects on bacterial community and microbial interactions in wetland system remains unclear. To verify these issues, a lab-scale constructed wetland exposed to low concentration FQs mixture was carried out for two months. The results showed that the removal efficiencies of COD and TP w ...
DOI:
10.1016/j.scitotenv.2019.135156

14. Soil pH and temperature regulate assembly processes of abundant and rare bacterial communities in agricultural ecosystems

Author:
Jiao, Shuo; Lu, Yahai
Source:
Environmental microbiology 2020 v.22 no.3 pp. 1052-1065
ISSN:
1462-2912
Subject:
bacterial communities,   etc   ; agroecosystems; community structure; corn; environmental factors; geographical distribution; paddies; phylogeny; soil pH; temperature; China;     Show all 11 Subjects
Abstract:
... The factors determining stochastic and deterministic processes that drive microbial community structure, specifically the balance of abundant and rare bacterial taxa, remain underexplored. Here we examined biogeographic patterns of abundant and rare bacterial taxa and explored environmental factors influencing their community assembly processes in agricultural fields across eastern China. More phy ...
DOI:
10.1111/1462-2920.14815

15. Enhanced anaerobic degradation of nitrogen heterocyclic compounds with methanol, sodium citrate, chlorella, spirulina, and carboxymethylcellulose as co-metabolic substances

Author:
Shi, Jingxin; Xu, Chunyan; Han, Yuxing; Han, Hongjun
Source:
Journal of hazardous materials 2020 v.384 pp. 121496
ISSN:
0304-3894
Subject:
bacterial communities,   etc   ; Chlorella; Spirulina; anaerobic treatment; carboxymethylcellulose; community structure; indoles; methanol; quinoline; sodium citrate;     Show all 10 Subjects
Abstract:
... The aim of the study was to explore the feasibility of methanol, sodium citrate, chlorella, spirulina, and carboxymethylcellulose (CMC) as co-metabolic substances in strengthening the anaerobic degradation of selected nitrogen heterocyclic compounds (NHCs). Chlorella, spirulina, and CMC as co-metabolic substances were first introduced into the enhanced anaerobic treatment of refractory compounds. ...
DOI:
10.1016/j.jhazmat.2019.121496

16. New insight into fates of sulfonamide and tetracycline resistance genes and resistant bacteria during anaerobic digestion of manure at thermophilic and mesophilic temperatures

Author:
Zou, Yina; Xiao, Yao; Wang, Hui; Fang, Tingting; Dong, Peiyan
Source:
Journal of hazardous materials 2020 v.384 pp. 121433
ISSN:
0304-3894
Subject:
bacterial communities,   etc   ; anaerobic digestion; antibiotic resistance; bacteria; clones; hosts; prediction; resistance genes; selective media; temperature; tetracycline;     Show all 11 Subjects
Abstract:
... This study investigated the variations in antibiotic (sulfonamide and tetracycline) resistance genes (ARGs) and resistant bacteria (ARB) during manure anaerobic digestion (AD) at 35 ℃ and 55 ℃, and discussed the mechanisms of variations in ARGs. The AD lasted for 60 days, five ARGs and intI1 each decreased in abundance after AD at the thermophilic temperature, while only half decreased at the meso ...
DOI:
10.1016/j.jhazmat.2019.121433

17. Bioinformatic strategies to address limitations of 16rRNA short-read amplicons from different sequencing platforms

Author:
Bailén, María; Bressa, Carlo; Larrosa, Mar; González-Soltero, Rocío
Source:
Journal of microbiological methods 2020 v.169 pp. 105811
ISSN:
0167-7012
Subject:
bacterial communities,   etc   ; Bacteroides; bioinformatics; genes; metagenomics; pipelines; ribosomal RNA; sequence analysis;     Show all 8 Subjects
Abstract:
... Sequencing the 16S gene rRNA has become a popular method when identifying bacterial communities. However, recent studies address differences in the characterization based on sample preparation, sequencing platforms, and data analysis. In this work, we tested some of the available user-friendly protocols for data analysis with the reads obtained from the sequencing machines Illumina MiSeq and Ion T ...
DOI:
10.1016/j.mimet.2019.105811

18. Bioaugmentation of triclocarban and its dechlorinated congeners contaminated soil with functional degraders and the bacterial community response

Author:
Liang, Bin; Yun, Hui; Kong, Deyong; Ding, Yangcheng; Li, Xiangkai; Vangnai, Alisa S.; Wang, Aijie
Source:
Environmental research 2020 v.180 pp. 108840
ISSN:
0013-9351
Subject:
bacterial communities,   etc   ; Ochrobactrum; bioaugmentation; biodegradation; inoculum; microbiome; phylogeny; polluted soils; wastewater treatment;     Show all 9 Subjects
Abstract:
... Partial removal of haloaromatic antimicrobial triclocarban (TCC) during wastewater treatment caused the final introduction of residual TCC into soils. Bioaugmentation has been proposed for the biodegradation of TCC and its dechlorinated congeners 4,4′-dichlorocarbanilide (DCC) and carbanilide (NCC) in soil. The isolated TCC-degrading strain Ochrobactrum sp. TCC-2 and chloroanilines-degrading strai ...
DOI:
10.1016/j.envres.2019.108840

19. Evidence for the coexistence of direct and riboflavin‐mediated interspecies electron transfer in Geobacter co‐culture

Author:
Huang, Lingyan; Liu, Xing; Ye, Yin; Chen, Man; Zhou, Shungui
Source:
Environmental microbiology 2020 v.22 no.1 pp. 243-254
ISSN:
1462-2912
Subject:
bacterial communities,   etc   ; Geobacter sulfurreducens; coculture; cytochromes; electron transfer; electrons; kinetics; oxidation; riboflavin;     Show all 9 Subjects
Abstract:
... Geobacter species can secrete free redox‐active flavins, but the role of these flavins in the interspecies electron transfer (IET) of Geobacter direct interspecies electron transfer (DIET) co‐culture is unknown. Here, we report the presence of a new riboflavin‐mediated interspecies electron transfer (RMIET) process in a traditional Geobacter DIET co‐culture; in this process, riboflavin contributes ...
DOI:
10.1111/1462-2920.14842

20. Survival of Salmonella enterica and shifts in the culturable mesophilic aerobic bacterial community as impacted by tomato wash water particulate size and chlorine treatment

Author:
Van Haute, Sam; Luo, Yaguang; Bolten, Samantha; Gu, Ganyu; Nou, Xiangwu; Millner, Patricia
Source:
Food microbiology 2020 v.90 pp. 103470
ISSN:
0740-0020
Subject:
bacterial communities,   etc   ; Salmonella enterica; aerobes; bacteria; chlorine; cross contamination; filtration; food safety; grape tomatoes; packing houses; particulates; spores; tanks;     Show all 13 Subjects
Abstract:
... Particulates of harvest debris are common in tomato packinghouse dump tanks, but their role in food safety is unclear. In this study we investigated the survival of Salmonella enterica and the shifts in relative abundance of culturable mesophilic aerobic bacteria (cMAB) as impacted by particulate size and interaction with chlorine treatment. Particulates suspended in grape tomato wash water spanne ...
DOI:
10.1016/j.fm.2020.103470