scholarly journals Different Responses of Bacterial and Archaeal Communities in River Sediments to Water Diversion and Seasonal Changes

2021 ◽  
Vol 9 (4) ◽  
pp. 782
Author(s):  
Jiali Lv ◽  
Yangdan Niu ◽  
Ruiqiang Yuan ◽  
Shiqin Wang
Keyword(s):  
Bacterial Communities ◽  
Seasonal Changes ◽  
High Throughput Sequencing ◽  
Environmental Changes ◽  
Yellow River ◽  
River Sediments ◽  
Water Transfer ◽  
Water Diversion ◽  
Bacterial And Archaeal Communities ◽  
Archaeal Communities

In recent years, different responses of archaea and bacteria to environmental changes have attracted increasing scientific interest. In the mid-latitude region, Fen River receives water transferred from the Yellow River, electrical conductivity (EC), concentrations of Cl− and Na+ in water, total phosphorus (TP), and Olsen phosphorus (OP) in sediments were significantly affected by water transfer. Meanwhile, temperature and oxidation-reduction potential (ORP) of water showed significant seasonal variations. Based on 16S rRNA high-throughput sequencing technology, the composition of bacteria and archaea in sediments was determined in winter and summer, respectively. Results showed that the dominance of bacterial core flora decreased and that of archaeal core flora increased after water diversion. The abundance and diversity of bacterial communities in river sediments were more sensitive to anthropogenic and naturally induced environmental changes than that of archaeal communities. Bacterial communities showed greater resistance than archaeal communities under long-term external disturbances, such as seasonal changes, because of rich species composition and complex community structure. Archaea were more stable than bacteria, especially under short-term drastic environmental disturbances, such as water transfer, due to their insensitivity to environmental changes. These results have important implications for understanding the responses of bacterial and archaeal communities to environmental changes in river ecosystems affected by water diversion.

scholarly journals The Influence on Contaminant Bioavailability and Microbial Abundance of Lake Hongze by the South-to-North Water Diversion Project

2019 ◽  
Vol 16 (17) ◽  
pp. 3068
Author(s):  
Yu Yao ◽  
Peifang Wang ◽  
Chao Wang
Keyword(s):  
Environmental Factors ◽  
High Throughput Sequencing ◽  
Alpha Diversity ◽  
Northern China ◽  
Water Transfer ◽  
The Other ◽  
Water Diversion ◽  
Microbial Abundance ◽  
The South ◽  
North Water

The world famous South-to-North Water Transfer Project was built to alleviate serious water shortages in northern China. Considering that lake Hongze is an important freshwater lake in this region, analyzing the influence of water diversion on typical contaminant bioavailability and microbial abundance could aid in achieving a good overall understanding of hydrodynamic variation. Accordingly, in situ high-resolution measurements of diffusive gradients in thin films (DGT) and next-generation high-throughput sequencing were combined in order to survey Lake Hongze and determine the relationship between environmental factors and microbial communities. The DGT method effectively obtained more than the 85% of bioavailable concentrations of the corresponding contaminants; the results showed that labile P, S, Fe, As, and Hg concentrations were higher in areas influenced by water transfer. Moreover, the relative abundance and alpha diversity of the sampling sites distributed in the water transfer area differed significantly from other sites. The pH, conductivity, and labile Mn, As, and P were shown to be the primary environmental factors affecting the abundance and diversity of microbes. With the exception of bioturbation-affected sites controlled by labile Mn and pH, sites distributed in the water diversion area were most affected by As and conductivity, with little spatial discrepancy. Furthermore, site 2, with higher bioturbation abundance, and site 10, with stronger hydrodynamics, had low alpha diversity compared to the other sites. Consequently, the bioavailability of typical contaminants such as P, S, As, Hg, Fe, Mg, Cd, Pb, and Mn, as well as the diversity and abundance of microbial in the sites influenced by the water diversion, were significantly different to the other sites. Thus, the impacts of the South-to-North Water Transfer Project on participant lakes were non-negligible overall in the investigation.

Impacts on the utilization degree of canal water caused by agricultural water reallocation: a case study from China

Water Policy ◽  
2015 ◽  
Vol 17 (5) ◽  
pp. 815-830 ◽  
Author(s):  
Xiaoping Dai ◽  
Yuping Han ◽  
Xiaohong Zhang ◽  
Daoxi Li ◽  
Jing Chen
Keyword(s):  
Water Supply ◽  
Yellow River ◽  
Household Head ◽  
Water Transfer ◽  
Water Diversion ◽  
Agricultural Water ◽  
Canal Water ◽  
Current Compensation ◽  
Compensation Methods ◽  
Agricultural Water Supply

Our study area in the People's Victory Canal Irrigation District (PVCID), which is downstream of the Yellow River in China, has been undergoing agricultural water transfer to the city for municipal uses. Water supply condition data from PVCID are used to analyze the impacts of water reallocation on agricultural water supply quality, and field survey data in PVCID are used to examine the impacts of agricultural water supply quality on the utilization degree of canal water. Several issues on the current compensation methods are also discussed. Results show that the amount of irrigation water and the number of days for irrigation are affected by water reallocation, especially when the amount of water diversion significantly decreases. Regression results show that timeliness and adequacy of canal water are important factors affecting the utilization degree of canal water. Several factors reveal significant association with the utilization degree of canal water, such as the water price of canal water, water fee charge methods, soil texture of the largest cropland, precipitation, and age of farm household head. Current compensation methods can hardly compensate for the decrease in canal water reliability. Some recommendations are put forward to compensate for the adverse effects of agricultural water transfer.

scholarly journals Ecological Strategies on the Demonstration of the Western Route Water Transfer

2018 ◽  
Vol 246 ◽  
pp. 01030
Author(s):  
Tongtong Wang ◽  
Hao Chen
Keyword(s):  
Water Resources ◽  
Environmental Changes ◽  
Yellow River ◽  
Early Stage ◽  
Water Source ◽  
Water Transfer ◽  
Water Saving ◽  
Ecological Civilization ◽  
Source Regions ◽  
North Water

To comply with the national strategic layout adjustment in recent years, and to promote ecological civilization construction in China western region, it is necessary to study the opportunities and challenges in the Western Route Water Transfer demonstration brought by in ecological and environmental changes in both water-source regions and water receiving regions. By referring to the operation management experience of the Eastern and Middle routes of the South-to-North Water Transfer Project, this paper analyzed the ecological and environmental changes of the Western Route Project’s water transfer rivers, and the relationship between water and sediment of the Yellow River in water-receiving regions, found out the integrating point between the Western Route Project and the new development ideas, and finally concluded that the ecology must be given to priority in the demonstration of the Western Route Project. The early stage work of the Western Route Project needed to follow the general principles as for any major water conservancy project, which includes to demonstrate the project necessity given fully employing the water-saving potential, and to give highest priority to ecological security. Several relationships need be coordinated between: water source regions and water-receiving regions in water-saving, water ecological restoration and water resources development, water pollution control and water resources management, government leading and society participation, etc. These instruments above will guarantee both the water-source and water-receiving regions could benefit from the Western Route Project, help to solve the contradiction between ecological protection and water resources allocation, and facilitate achieving the target of sustainable development.

scholarly journals High-Throughput Sequencing Survey of Sunflower Soil

2021 ◽  
Vol 10 (8) ◽  
Author(s):  
Olubukola Oluranti Babalola ◽  
Blessing Chidinma Nwachukwu ◽  
Ayansina Segun Ayangbenro
Keyword(s):  
South Africa ◽  
High Throughput Sequencing ◽  
Soil Processes ◽  
North West ◽  
The North ◽  
Plant Environment ◽  
Bacterial And Archaeal Communities ◽  
Below Ground ◽  
Archaeal Communities ◽  
Microbiota Diversity

ABSTRACT Plant rhizobiomes are responsible for major soil processes in the immediate plant environment, but our knowledge of the linkage between below-ground microbiota diversity and plant health is limited. We studied the bacterial and archaeal communities of sunflower rhizosphere organisms by comparing the composition of these communities to bulk soils at three farms in the North West province of South Africa. We evaluated and described a plethora of bacterial and archaeal taxa.

scholarly journals Planktonic Bacterial and Archaeal Communities in an Artificially Irrigated Estuarine Wetland: Diversity, Distribution, and Responses to Environmental Parameters

2020 ◽  
Vol 8 (2) ◽  
pp. 198
Author(s):  
Mingyue Li ◽  
Tiezhu Mi ◽  
Zhigang Yu ◽  
Manman Ma ◽  
Yu Zhen
Keyword(s):  
16S Rrna ◽  
Microbial Communities ◽  
High Throughput Sequencing ◽  
Environmental Parameters ◽  
Archaeal Community ◽  
Rrna Gene ◽  
Liaohe River ◽  
Estuarine Wetland ◽  
Bacterial And Archaeal Communities ◽  
Archaeal Communities

Bacterial and archaeal communities play important roles in wetland ecosystems. Although the microbial communities in the soils and sediments of wetlands have been studied extensively, the comprehensive distributions of planktonic bacterial and archaeal communities and their responses to environmental variables in wetlands remain poorly understood. The present study investigated the spatiotemporal characteristics of the bacterial and archaeal communities in the water of an artificially irrigated estuarine wetland of the Liaohe River, China, explored whether the wetland effluent changed the bacterial and archaeal communities in the Liaohe River, and evaluated the driving environmental factors. Within the study, 16S rRNA quantitative PCR methods and MiSeq high-throughput sequencing were used. The bacterial and archaeal 16S rRNA gene abundances showed significant temporal variation. Meanwhile, the bacterial and archaeal structures showed temporal but not spatial variation in the wetland and did not change in the Liaohe River after wetland drainage. Moreover, the bacterial communities tended to have higher diversity in the wetland water in summer and in the scarce zone, while a relatively higher diversity of archaeal communities was found in autumn and in the intensive zone. DO, pH and PO4-P were proven to be the essential environmental parameters shaping the planktonic bacterial and archaeal community structures in the Liaohe River estuarine wetland (LEW). The LEW had a high potential for methanogenesis, which could be reflected by the composition of the microbial communities.

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 The Structure and Species Co-Occurrence Networks of Soil Denitrifying Bacterial Communities Differ Between A Coniferous and A Broadleaved Forests

2019 ◽  
Vol 7 (9) ◽  
pp. 361 ◽  
Author(s):  
Jie Chen ◽  
Jiajia Li ◽  
Weijun Shen ◽  
Han Xu ◽  
Yide Li ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Bacterial Communities ◽  
High Throughput Sequencing ◽  
Environmental Changes ◽  
Southern China ◽  
Soil Microbial Communities ◽  
Sequencing Data ◽  
Microbial Biomass Nitrogen ◽  
N Transformations ◽  
Α Diversity

Acacia mangium (AM) and Pinus massoniana (PM) are widely planted in tropical regions, whereas their effects on soil microbial communities remain unclear. We did a comprehensive investigation of soil denitrifying bacterial communities in AM and PM monoculture plantations in Southern China based on the high throughput sequencing data of their functional genes: nirK, nirS, and nosZ. The average abundance of nosZ (1.3 × 107) was significantly higher than nirS (5.6 × 106) and nirK (4.9 × 105). Shannon estimator revealed a markedly higher α-diversity of nirS and nosZ communities in PM than in AM plantations. The AM and PM plantations were dominated by different nirS and nosZ taxa belonging to proteobacteria, actinobacteria, thermoleophilia, chloroflexia, and acidobacteria, while the dominant nirK taxa were mainly categorized into proteobacteria in both types of plantations. The structure of nirS and nosZ communities shifted substantially from AM to PM plantations with changes in soil moisture, NH4+, and microbial biomass nitrogen content. The species co-occurrence network of nirK community was better organized in a more modular manner compared to nirS and nosZ communities, and the network keystone species mostly occurred in PM plantations. These results indicated a highly species corporation of nirK community in response to environmental changes, especially in PM plantations. AM and PM plantations can form different soil denitrifying microbial communities via altering soil physicochemical properties, which may further affect soil N transformations.

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