scholarly journals Seasonal Changes of Airborne Bacterial Communities Over Tokyo and Influence of Local Meteorology

2019 ◽  
Vol 10 ◽  
Author(s):  
Jun Uetake ◽  
Yutaka Tobo ◽  
Yasushi Uji ◽  
Thomas C. J. Hill ◽  
Paul J. DeMott ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Seasonal Changes ◽  
Local Meteorology

scholarly journals Seasonal changes in the digesta-adherent rumen bacterial communities of dairy cattle grazing pasture

PLoS ONE ◽  
2017 ◽  
Vol 12 (3) ◽  
pp. e0173819 ◽  
Author(s):  
Samantha J. Noel ◽  
Graeme T. Attwood ◽  
Jasna Rakonjac ◽  
Christina D. Moon ◽  
Garry C. Waghorn ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Bacterial Communities ◽  
Seasonal Changes ◽  
Cattle Grazing

Seasonal changes in nitrogen-cycle gene abundances and in bacterial communities in acidic forest soils

2012 ◽  
Vol 50 (3) ◽  
pp. 365-373 ◽  
Author(s):  
Jaejoon Jung ◽  
Jinki Yeom ◽  
Jiwon Han ◽  
Jisun Kim ◽  
Woojun Park
Keyword(s):  
Nitrogen Cycle ◽  
Forest Soils ◽  
Bacterial Communities ◽  
Seasonal Changes

scholarly journals Seasonal Changes in a Maize-Based Polyculture of Central Mexico Reshape the Co-occurrence Networks of Soil Bacterial Communities

2017 ◽  
Vol 8 ◽  
Author(s):  
Eria A. Rebollar ◽  
Edson Sandoval-Castellanos ◽  
Kyria Roessler ◽  
Brandon S. Gaut ◽  
Luis D. Alcaraz ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Seasonal Changes ◽  
Central Mexico ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Seasonal Changes in Bacterial Communities Cause Foaming in a Wastewater Treatment Plant

2015 ◽  
Vol 71 (3) ◽  
pp. 660-671 ◽  
Author(s):  
Ping Wang ◽  
Zhisheng Yu ◽  
Jihong Zhao ◽  
Hongxun Zhang
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Bacterial Communities ◽  
Seasonal Changes ◽  
Treatment Plant

scholarly journals Effects of forest conversion and seasonal changes on the assembly of bacterial and fungal communities in tropical forests

2021 ◽  
Author(s):  
G Lan ◽  
Bangqian Chen ◽  
Zhixiang Wu ◽  
Chuan Yang ◽  
Xicai Zhang
Keyword(s):  
Community Assembly ◽  
Bacterial Communities ◽  
Seasonal Changes ◽  
Rainy Season ◽  
Tropical Rainforest ◽  
Dry Season ◽  
Fungal Communities ◽  
Forest Conversion ◽  
Rubber Plantation ◽  
Soil Microbial

To date, few studies have assessed the impact of forest conversion or seasonal changes on soil microbial community assembly. To fill this research gap, 16S rRNA and ITS gene sequences were used to evaluate the effects of forest conversion and seasonal changes on the assembly of bacterial and fungal communities using 260 soil samples collected from tropical rainforest and rubber plantation sites across Hainan Island, South China. A majority (~60%) of observed OTUs conformed with neutral model expectations, indicating that neutral processes were important for the assembly of soil microbial communities. For bacterial communities, the NST (normalized stochasticity ratio) was higher in the tropical rainforest (0.746 in the dry season, 0.684 in the rainy season) versus rubber plantation sites (0.647, 0.584), regardless of season. Thus, forest conversion decreased the importance of stochasticity for soil bacterial community assembly. For fungal communities, rubber plantation communities showed greater stochasticity (NST = 0.578) than rainforest communities (NST = 0.388) in the dry season, but the reverse was true in the rainy season (NST = 0.852 for rubber plantations; NST = 0.978 for rainforest). Both the NST results and structural equation modeling showed that bacterial communities were more stochastic in the dry season, while fungal communities were more stochastic in the rainy season; the effects of seasonal changes on assembly therefore differed between bacterial and fungal communities. More importantly, forest conversion did not have a direct impact on the assembly of bacterial or fungal communities, but exerted indirect effects via soil pH and soil AK.

scholarly journals Variations in gut bacterial communities of hooded crane (Grus monacha) over spatial-temporal scales

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7045 ◽  
Author(s):  
Yuanqiu Dong ◽  
Xingjia Xiang ◽  
Guanghong Zhao ◽  
Yunwei Song ◽  
Lizhi Zhou
Keyword(s):  
Bacterial Community ◽  
Bacterial Communities ◽  
Seasonal Changes ◽  
High Throughput Sequencing ◽  
Bacterial Composition ◽  
Gut Microbe ◽  
Host Life ◽  
Internal And External Factors ◽  
Gut Microbial Community ◽  
Grus Monacha

BackgroundMicrobes have been recognized as important symbionts to regulate host life. The animal gut harbors abundance and diverse bacteria. Numerous internal and external factors influence intestinal bacterial communities, including diet, seasonal fluctuations and habitat sites. However, the factors that influence the gut bacterial communities of wild bird is poorly characterized.MethodsBy high-throughput sequencing and statistical analysis, we investigated the variations in gut bacterial communities of the hooded cranes at three wintering stages in Caizi (CZL) and Shengjin Lake (SJL), which are two shallow lakes in the middle and lower Yangtze River floodplain.ResultsOur results revealed significant differences in gut bacterial community structure and diversity among different sampling sites and wintering stages. Seasonal changes have a significant impact on the gut microbe composition of hooded cranes in the two lakes. ANOSIM analysis demonstrated that the samples in CZL had greater differences in the gut bacterial composition than that in SJL. Our data showed strong evidence that the host’s gut filtering might be an important factor in shaping bacterial community according to mean nearest taxon distance (MNTD). The PICRUSt analysis showed that the predicted metagenomes associated with the gut microbiome were carbohydrate metabolism, amino acid metabolism and energy metabolism over the entire wintering period at the two lakes.ConclusionsThe results demonstrated that both seasonal changes and habitat sites have significant impact on the gut bacterial communities of hooded cranes. In addition, predictive function of gut microbes in hooded cranes varied over time. These results provide new insights into the gut microbial community of the cranes, which serves as a foundation for future studies.

scholarly journals Variations in bacterial communities during foliar litter decomposition in the winter and growing seasons in an alpine forest of the eastern Tibetan Plateau

2016 ◽  
Vol 62 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Yeyi Zhao ◽  
Fuzhong Wu ◽  
Wanqin Yang ◽  
Bo Tan ◽  
Wei He
Keyword(s):  
Tibetan Plateau ◽  
16S Rrna ◽  
Litter Decomposition ◽  
Bacterial Communities ◽  
Seasonal Changes ◽  
Growing Season ◽  
Elemental Content ◽  
Eastern Tibetan Plateau ◽  
Alpine Forest ◽  
Growing Seasons

Bacterial communities are the primary engineers during litter decomposition and related material cycling, and they can be strongly controlled by seasonal changes in temperature and other environmental factors. However, limited information is available on changes in the bacterial community from winter to the growing season as litter decomposition proceeds in cold climates. Here, we investigated the abundance and structure of bacterial communities using real-time quantitative PCR and denaturing gradient gel electrophoresis (DGGE) during a 2-year field study of the decomposition of litter of 4 species in the winter and growing seasons of an alpine forest of the eastern Tibetan Plateau. The abundance of the bacterial 16S rRNA gene was relatively high during decomposition of cypress and birch litter in the first winter, but for the other litters 16S rRNA abundance during both winters was significantly lower than during the following growing season. A large number of bands were observed on the DGGE gels, and their intensities and number from the winter samples were lower than those from the growing season during the 2-year decomposition experiment. Eighty-nine sequences from the bands of bacteria that had been cut from the DGGE gels were affiliated with 10 distinct classes of bacteria and an unknown group. A redundancy analysis indicated that the moisture, mass loss, and elemental content (e.g., C, N, and P) of the litter significantly affected the bacterial communities. Collectively, the results suggest that uneven seasonal changes in climate regulate bacterial communities and other decomposers, thus affecting their contribution to litter decomposition processes in the alpine forest.

scholarly journals Habitats Are More Important Than Seasons in Shaping Soil Bacterial Communities on the Qinghai-Tibetan Plateau

2021 ◽  
Vol 9 (8) ◽  
pp. 1595
Author(s):  
Rui Wang ◽  
Miao Wang ◽  
Jing Wang ◽  
Yinghua Lin
Keyword(s):  
Tibetan Plateau ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Seasonal Changes ◽  
Relative Effect ◽  
Soil Bacterial Communities ◽  
Bacterial Dynamics ◽  
Composition And Structure ◽  
Microbial Biomarkers ◽  
Soil Bacterial

Both habitats and seasons can determine the dynamics of microbial communities, but the relative importance of different habitats and seasonal changes in shaping the soil bacterial community structures on a small spatial scale in permafrost areas remains controversial. In this study, we explored the relative effect of four typical alpine meadow habitats (swamp wetland, swamp meadow, meadow and mature meadow) versus seasons on soil bacterial communities based on samples from the Qinghai-Tibetan Plateau in four months (March, May, July and September). The results showed that habitats, rather than seasons explained more variation of soil bacterial composition and structure. Environmental cofactors explained the greatest proportion of bacterial variation observed and can help elucidate the driving force of seasonal changes and habitats on bacterial communities. Soil temperature played the most important role in shaping bacterial beta diversities, followed by soil total nitrogen and pH. A group of microbial biomarkers, used as indicators of different months, were identified using random forest modeling, and for which relative abundance was shaped by different environmental factors. Furthermore, seasonality in bacterial co-occurrence patterns was observed. The data showed that co-occurrence relationships changed over months. The inter-taxa connections in May and July were more pronounced than that in March and September. Bryobacter, a genus of subgroup_22 affiliated to Acidobacteria, and Pseudonocardia belonging to Actinobacteria were observed as the keystone taxa in different months in the network. These results demonstrate that the bacterial community was clustered according to the seasonal mechanism, whereas the co-occurrence relationships changed over months, which indicated complex bacterial dynamics in a permafrost grassland on the eastern edge of Qinghai-Tibetan.

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