scholarly journals Phyllopshere Bacterial Community Structure of Spinach (Spinacia oleracea) as Affected by Cultivar and Environmental Conditions at Time of Harvest

Diversity ◽  
2011 ◽  
Vol 3 (4) ◽  
pp. 721-738 ◽  
Author(s):  
Gabriela Lopez-Velasco ◽  
Gregory E. Welbaum ◽  
Joseph O. Falkinham III ◽  
Monica A. Ponder
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Environmental Conditions ◽  
Bacterial Community Structure ◽  
Spinacia Oleracea ◽  
Time Of Harvest

scholarly journals Divergent Patterns of Bacterial Community Structure and Function in Response to Estuarine Output in the Middle of the Bohai Sea

2021 ◽  
Vol 12 ◽  
Author(s):  
Caixia Wang ◽  
Haikun Zhang ◽  
Pengyuan Liu ◽  
Yibo Wang ◽  
Yanyu Sun ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Microbial Communities ◽  
Environmental Conditions ◽  
Bacterial Community Structure ◽  
Bohai Sea ◽  
Bacterial Community Composition ◽  
Nucleotide Metabolism ◽  
The Yellow Sea ◽  
The Bohai Sea

Understanding environment-community relationships under shifting environmental conditions helps uncover mechanisms by which environmental microbial communities manage to improve ecosystem functioning. This study investigated the microbial community and structure near the Yellow Sea River estuary in 12 stations across the middle of the Bohai Sea for over two seasons to elucidate the influence of estuarine output on them. We found that the dominant phyla in all stations were Proteobacteria, Cyanobacteria, Bacteroidetes, Actinobacteria, and Planctomycetes. Alpha-diversity increased near the estuary and bacterial community structure differed with variation of spatiotemporal gradients. Among all the environmental factors surveyed, temperature, salinity, phosphate, silicon, nitrate, and total virioplankton abundance played crucial roles in controlling the bacterial community composition. Some inferred that community functions such as carbohydrate, lipid, amino acid metabolism, xenobiotics biodegradation, membrane transport, and environmental adaptation were much higher in winter; energy and nucleotide metabolism were lower in winter. Our results suggested that estuarine output had a great influence on the Bohai Sea environment and changes in the water environmental conditions caused by estuarine output developed distinctive microbial communities in the middle of the Bohai Sea. The distinctive microbial communities in winter demonstrated that the shifting water environment may stimulate changes in the diversity and then strengthen the predicted functions.

Effects of remediation on the bacterial community of an acid mine drainage impacted stream

2012 ◽  
Vol 58 (11) ◽  
pp. 1316-1326 ◽  
Author(s):  
Suchismita Ghosh ◽  
Moumita Moitra ◽  
Christopher J. Woolverton ◽  
Laura G. Leff
Keyword(s):  
Community Structure ◽  
Acid Mine Drainage ◽  
Bacterial Community ◽  
Environmental Conditions ◽  
Bacterial Community Structure ◽  
Mine Drainage ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Acid Mine ◽  
Reference Stream

Acid mine drainage (AMD) represents a global threat to water resources, and as such, remediation of AMD-impacted streams is a common practice. During this study, we examined bacterial community structure and environmental conditions in a low-order AMD-impacted stream before, during, and after remediation. Bacterial community structure was examined via polymerase chain reaction amplification of 16S rRNA genes followed by denaturing gradient gel electrophoresis. Also, bacterial abundance and physicochemical data (including metal concentrations) were collected and relationships to bacterial community structure were determined using BIO-ENV analysis. Remediation of the study stream altered environmental conditions, including pH and concentrations of some metals, and consequently, the bacterial community changed. However, remediation did not necessarily restore the stream to conditions found in the unimpacted reference stream; for example, bacterial abundances and concentrations of some elements, such as sulfur, magnesium, and manganese, were different in the remediated stream than in the reference stream. BIO-ENV analysis revealed that changes in pH and iron concentration, associated with remediation, primarily explained temporal alterations in bacterial community structure. Although the sites sampled in the remediated stream were in relatively close proximity to each other, spatial variation in community composition suggests that differences in local environmental conditions may have large impacts on the microbial assemblage.

Temporally invariable bacterial community structure in the Arabian Sea oxygen minimum zone

2014 ◽  
Vol 73 (1) ◽  
pp. 51-67 ◽  
Author(s):  
A Jain ◽  
M Bandekar ◽  
J Gomes ◽  
D Shenoy ◽  
RM Meena ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Arabian Sea ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum
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