scholarly journals Beneficial changes in rumen bacterial community profile in sheep and dairy calves as a result of feeding the probioticBacillus amyloliquefaciensH57

2018 ◽  
Vol 124 (3) ◽  
pp. 855-866 ◽  
Author(s):  
B.J. Schofield ◽  
N. Lachner ◽  
O.T. Le ◽  
D.M. McNeill ◽  
P. Dart ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Dairy Calves ◽  
Community Profile

scholarly journals Spatial Variations of the Bacterial Diversity in an Alkaline Lake

2021 ◽  
Vol 4 ◽  
Author(s):  
E. Gozde Ozbayram ◽  
Latife Koker ◽  
Reyhan Akçaalan ◽  
Fatih Aydın ◽  
Meriç Albay
Keyword(s):  
Surface Water ◽  
Bacterial Community ◽  
Bacterial Diversity ◽  
Water Samples ◽  
Bacterial Communities ◽  
Sediment Samples ◽  
Diversity Patterns ◽  
Water And Sediment ◽  
Alkaline Lake ◽  
Community Profile

Lake Iznik is one of the largest lake of Turkey covering 308 km2 surface area with 65 m max. depth. The lake has alkaline characteristics (Akcaalan et al. 2014). It is a mesotrophic lake that becomes stratified between June-September and well mixed between October-April. Although there are almost 200 lakes in Turkey, there is very little published research focused on the bacterial diversity structures (Ozbayram et al. 2020.) The specific objective of this study was to evaluate the bacterial community profile in the surface water and sediment of the alkaline lake during the winter turnover. For this purpose, the samples were collected from 6 stations (5 on the shore and 1 in the middle of the lake) in February 2020 when the lake was completely mixed. In addition to the surface water and sediment samples, a sample was also collected from the depth of 40 m from the station located in the mid-lake. The water samples were filtered from a 0.22 µm filter and the sediment samples were taken into sterile plastic containers. The total DNAs were extracted using the NucleoSpin® Soil Kit (Macherey-Nagel, Germany) following the manufacturer’s instructions. Bacterial community profiles of the samples were analyzed by 16S rRNA gene-targeted sequencing using Illumina® MiSeq™. Physicochemical parameters were measured as explained by Ozbayram et al. 2020. The pH was between 8.29-8.67 and the Electrical Conductivity (EC) was in the range of 734-996 µS/cm (Suppl. material 1 -Table S1). Whereas the Dissolved Oxygen (DO) levels were measured as 10.12-11.65 mg/L in the surface waters, it was 9.72 mg/L in the 40 m. Among all samples, the highest value of the Shannon and Pielou's evenness indices were calculated for the surface water sample collected from station 2 indicated a more evenly distributed and diverse bacterial community (Suppl. material 1-Table S2). Bacterial diversity patterns of the samples were presented at the phylum level in Figure 1. In compliance with the literature on freshwaters (Zhang et al. 2014), the community was dominated by Proteobacteria species, and higher abundances were determined in the sediment samples (ranged 40.4-50.0 %). Especially, Gammaproteobacteria, Deltaproteobacteria were the major classes of this phylum in the sediment. On the other hand, the composition of bacterial communities in water samples showed a difference in which Actinobacteria and Bacteroidetes (in particular, the order: Flavobacteriales) were also predominated the communities. However, the community profile slightly differed with depth (station 6). At the genus level, most of the reads were not assigned any genera. Ilumatobacter, Fluviicola, and Flavobacterium were represented 3.4-7.1% of the bacterial community of water samples. Fig. 1 Overall, due to the complete mixing conditions in the lake, there was a homogenization of the bacterial communities and the diversity patterns were quite similar in the water samples. In further studies, samples will be collected during the stratification and the community structures will be compared.

Herpesvirus in the oral cavity of children with leukaemia and its impact on the oral bacterial community profile

2015 ◽  
Vol 68 (3) ◽  
pp. 222-228 ◽  
Author(s):  
Tacíria M Bezerra ◽  
Dennis C Ferreira ◽  
Flávia L Carmo ◽  
Raquel Pinheiro ◽  
Deborah C A Leite ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Oral Cavity ◽  
Community Profile

scholarly journals Temporal changes in the fecal bacterial community in Holstein dairy calves from birth through the transition to a solid diet

PLoS ONE ◽  
2020 ◽  
Vol 15 (9) ◽  
pp. e0238882
Author(s):  
Meagan L. Hennessy ◽  
Nagaraju Indugu ◽  
Bonnie Vecchiarelli ◽  
Joseph Bender ◽  
Christa Pappalardo ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Temporal Changes ◽  
Dairy Calves ◽  
Solid Diet ◽  
Fecal Bacterial Community
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