scholarly journals Diversity patterns of benthic bacterial communities along the salinity continuum of the Humber estuary (UK)

2018 ◽  
Vol 81 (3) ◽  
pp. 277-291 ◽  
Author(s):  
A Vidal-Durà ◽  
IT Burke ◽  
RJG Mortimer ◽  
DI Stewart
Keyword(s):  
Bacterial Communities ◽  
Diversity Patterns ◽  
Humber Estuary

Biogeography and diversity patterns of abundant and rare bacterial communities in rice paddy soils across China

2020 ◽  
Vol 730 ◽  
pp. 139116 ◽  
Author(s):  
Jinyu Hou ◽  
Longhua Wu ◽  
Wuxing Liu ◽  
Yanyan Ge ◽  
Tingting Mu ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Rice Paddy ◽  
Paddy Soils ◽  
Diversity Patterns ◽  
Rice Paddy Soils

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.

scholarly journals Bacterial Communities of Bartonella-Positive Fleas: Diversity and Community Assembly Patterns

2008 ◽  
Vol 74 (5) ◽  
pp. 1667-1670 ◽  
Author(s):  
Ryan T. Jones ◽  
Katherine F. McCormick ◽  
Andrew P. Martin
Keyword(s):  
Dna Sequencing ◽  
Dna Sequences ◽  
Community Assembly ◽  
Bacterial Communities ◽  
Universal Primers ◽  
Clone Libraries ◽  
Diversity Patterns ◽  
Oropsylla Hirsuta ◽  
Oropsylla Montana

ABSTRACT We investigated the bacterial communities of nine Bartonella-positive fleas (n = 6 Oropsylla hirsuta fleas and n = 3 Oropsylla montana fleas), using universal primers, clone libraries, and DNA sequencing. DNA sequences were used to classify bacteria detected in a phylogenetic context, to explore community assembly patterns within individual fleas, and to survey diversity patterns in dominant lineages.

scholarly journals Bacterial Community Spacing Is Mainly Shaped by Unique Species in the Subalpine Natural Lakes of China

2021 ◽  
Vol 12 ◽  
Author(s):  
Jinxian Liu ◽  
Jiahe Su ◽  
Meiting Zhang ◽  
Zhengming Luo ◽  
Xiaoqi Li ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Bacterial Communities ◽  
Environmental Gradients ◽  
Critical Role ◽  
Dispersal Limitation ◽  
Local Area ◽  
Diversity Patterns ◽  
Natural Lakes ◽  
Composition And Structure ◽  
Subalpine Lakes

Bacterial communities have been described as early indicators of both regional and global climatic change and play a critical role in the global biogeochemical cycle. Exploring the mechanisms that determine the diversity patterns of bacterial communities and how they share different habitats along environmental gradients are, therefore, a central theme in microbial ecology research. We characterized the diversity patterns of bacterial communities in Pipahai Lake (PPH), Mayinghai Lake (MYH), and Gonghai Lake (GH), three subalpine natural lakes in Ningwu County, Shanxi, China, and analyzed the distribution of their shared and unique taxa (indicator species). Results showed that the species composition and structure of bacterial communities were significantly different among the three lakes. Both the structure of the entire bacterial community and the unique taxa were significantly influenced by the carbon content (TOC and IC) and space distance; however, the structure of the shared taxa was affected by conductivity (EC), pH, and salinity. The structure of the entire bacterial community and unique taxa were mainly affected by the same factors, suggesting that unique taxa may be important in maintaining the spatial distribution diversity of bacterial communities in subalpine natural freshwater lakes. Our results provide new insights into the diversity maintenance patterns of the bacterial communities in subalpine lakes, and suggest dispersal limitation on bacterial communities between adjacent lakes, even in a small local area. We revealed the importance of unique taxa in maintaining bacterial community structure, and our results are important in understanding how bacterial communities in subalpine lakes respond to environmental change in local habitats.

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