Impact of microecological agents on water environment restoration and microbial community structures of trench system in a Baiyangdian wetland ecosystem

2021 ◽  
Author(s):  
Zhifei Li ◽  
Yang Liu ◽  
Jun Xie ◽  
Guangjun Wang ◽  
Xiangju Cheng ◽  
...  
Keyword(s):  
Microbial Community ◽  
Water Environment ◽  
Wetland Ecosystem ◽  
Community Structures ◽  
Microbial Community Structures ◽  
Baiyangdian Wetland ◽  
Environment Restoration

scholarly journals Changes in Microbial Community Structures under Reclaimed Water Replenishment Conditions

2020 ◽  
Vol 17 (4) ◽  
pp. 1174
Author(s):  
Jie Li ◽  
Yujiao Sun ◽  
Xiaoyu Wang ◽  
Shangwei Xu
Keyword(s):  
Microbial Community ◽  
Water Resources ◽  
Natural Water ◽  
Water Environment ◽  
Reclaimed Water ◽  
Ecological Niches ◽  
Rrna Gene ◽  
Community Structures ◽  
Significant Difference ◽  
Microbial Community Structures

Using reclaimed water as a resource for landscape water replenishment may alleviate the major problems of water resource shortages and water environment pollution. However, the safety of the reclaimed water and the risk of eutrophication caused by the reclaimed water replenishment are unclear to the public and to the research community. This study aimed to reveal the differences between natural water and reclaimed water and to discuss the rationality of reclaimed water replenishment from the perspective of microorganisms. The microbial community structures in natural water, reclaimed water and natural biofilms were analyzed, and the community succession was clarified along the ecological niches, water resources, fluidity and time using 16S rRNA gene amplicon sequencing. Primary biofilms without the original community were added to study the formation of microbial community structures under reclaimed water acclimation. The results showed that the difference caused by ecological niches was more than those caused by the fluidity of water and different water resources. No significant difference caused by the addition of reclaimed water was found in the microbial diversity and community structure. Based on the results of microbial analysis, reclaimed water replenishment is a feasible solution that can be used for supplying river water.

Salt stress-induced changes in microbial community structures and metabolic processes result in increased soil cadmium availability

2021 ◽  
Vol 782 ◽  
pp. 147125
Author(s):  
Meng Wang ◽  
Shuwen Zhao ◽  
Lifu Wang ◽  
Shibao Chen ◽  
Shanshan Li ◽  
...  
Keyword(s):  
Salt Stress ◽  
Microbial Community ◽  
Community Structures ◽  
Metabolic Processes ◽  
Microbial Community Structures ◽  
Soil Cadmium ◽  
Induced Changes

scholarly journals Microbial Population Changes during Bioremediation of an Experimental Oil Spill

1999 ◽  
Vol 65 (8) ◽  
pp. 3566-3574 ◽  
Author(s):  
Sarah J. MacNaughton ◽  
John R. Stephen ◽  
Albert D. Venosa ◽  
Gregory A. Davis ◽  
Yun-Juan Chang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Bacterial Community ◽  
Oil Spill ◽  
Phospholipid Fatty Acid ◽  
Community Structures ◽  
Gram Negative ◽  
Dgge Analysis ◽  
16S Rdna Pcr ◽  
Microbial Community Structures ◽  
Plfa Analysis

ABSTRACT Three crude oil bioremediation techniques were applied in a randomized block field experiment simulating a coastal oil spill. Four treatments (no oil control, oil alone, oil plus nutrients, and oil plus nutrients plus an indigenous inoculum) were applied. In situ microbial community structures were monitored by phospholipid fatty acid (PLFA) analysis and 16S rDNA PCR-denaturing gradient gel electrophoresis (DGGE) to (i) identify the bacterial community members responsible for the decontamination of the site and (ii) define an end point for the removal of the hydrocarbon substrate. The results of PLFA analysis demonstrated a community shift in all plots from primarily eukaryotic biomass to gram-negative bacterial biomass with time. PLFA profiles from the oiled plots suggested increased gram-negative biomass and adaptation to metabolic stress compared to unoiled controls. DGGE analysis of untreated control plots revealed a simple, dynamic dominant population structure throughout the experiment. This banding pattern disappeared in all oiled plots, indicating that the structure and diversity of the dominant bacterial community changed substantially. No consistent differences were detected between nutrient-amended and indigenous inoculum-treated plots, but both differed from the oil-only plots. Prominent bands were excised for sequence analysis and indicated that oil treatment encouraged the growth of gram-negative microorganisms within the α-proteobacteria andFlexibacter-Cytophaga-Bacteroides phylum. α-Proteobacteria were never detected in unoiled controls. PLFA analysis indicated that by week 14 the microbial community structures of the oiled plots were becoming similar to those of the unoiled controls from the same time point, but DGGE analysis suggested that major differences in the bacterial communities remained.

Analysis and comparison of the microbial community structures of two enrichment cultures capable of reductively dechlorinating TCE and cis-DCE

2003 ◽  
Vol 6 (1) ◽  
pp. 45-54 ◽  
Author(s):  
April Z. Gu ◽  
Brian P. Hedlund ◽  
James T. Staley ◽  
Stuart E. Strand ◽  
H. David Stensel
Keyword(s):  
Microbial Community ◽  
Community Structures ◽  
Enrichment Cultures ◽  
Microbial Community Structures
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